This gear clatter under load may damage the gears. The process is kind of similar to shift linkage adjustment. As a rule, idle gear clatter will not damage the gears, as almost no torque is transmitted at low speeds or when idling. Condition: New And if you didnt have one thats as durable and reliable as the one in your boat, your time on the water would be a lot less enjoyable and a lot more worrisome. These two functions are accomplished by a series of internal clutches, which when moved via the gear lever at the helm, engage different gear sets. We fully respect if you want to refuse cookies but to avoid asking you again and again kindly allow us to store a cookie for that. A propeller turning this fast would be highly inefficient, so it is the job of the gears inside the transmission to slow down the propeller rotation to roughly half that of the engine, which is why this is always referred to as the reduction ratio. If this is still present, the model number, ratio, and other information will be listed on it. Note that strictly speaking there is no such thing as forward and reverse, just clockwise and counterclockwise rotation. The stickiness may lessen while using the lubricant. This Website Uses Cookies. 11.5, ZF Transmission Adapter Plate SAE#3 for 45A, 63/68A, 63/68IV, ZF Transmission Adapter Plate SAE#3 for 80A, 85A, 85IV, ZF Transmission Adapter Plate SAE#4 for 45A, 63/68A, 63/68IV (Volvo D4/D6), ZF Transmission Adapter Plate SAE#3 for ZF 220A, ZF Transmission Adapter Plate SAE#3 ZF 220A & IRM280 (Old Style), ZF Transmission Adapter Plate SAE#3 CAT Engine for ZF 220A, ZF Transmission Adapter Plate SAE#3 for ZF 280A/IV, ZF Transmission Adapter Plate SAE#3 for ZF 285A/IV & ZF 286A/IV, Transmission Adapter Plate to Bellhousing Bolt Hardware Kit, SMX Transmission Spacer for Borg Warner Velvet Drive, ZF Marine Mechanical ATF Series Shift & Troll Valve, ZF Marine Electronic ATF Series Shift & Troll Valve, ZF Marine Electric EB15 Shift Valve with Trolling Valve, ZF Marine Mechanical Trolling Valve (ZF 280+), ZF 220/A Marine Mechanical Trolling Valve Kit, ZF ATF 63 A/IV 85 A/IV Electronic Progressive Shift Solenoid, ZF ATF 63 68 A/IV 80 85 A/IV Electronic Shift Solenoid, ZF EB15 Electronic Shift Solenoid (TROLL), ZF EB30/31 Electronic Shift Solenoid Coil, ZF ATF 63 A/IV 85 A/IV Electronic Troll Valve Coil, ZF Electronic Shift Solenoid Wire Plug/Cap, SMX Marine Transmission Drop in Screen Filter 45/63/68/80/85 A/IV Series ATF, Fleetguard LF701 Lube Filter for ZF Gears, Genuine ZF Marine Oil Filter Transmission (3213308019), ZF Marine 25A, 45A, 63A/IV, 80A/IV Input Shaft Seal, ZF Marine 63IV Inner (Small) Output Shaft Seal, ZF Marine 63IV Outer (Large) Output Shaft Seal, ZF Marine 80IV/85IV Inner (Small) Output Shaft Seal, ZF Marine 80IV/85IV Outer (Large) Output Shaft Seal, ZF 63A/IV 68A/IV 80A 85A SMX Marine Transmission Mounting Brackets, ZF 85IV SMX Marine Transmission Mounting Brackets, ZF 220A SMX Marine Transmission Mounting Brackets, ZF 280A ZF 280-1 ZF 220PL SMX Marine Transmission Mounting Brackets, ZF Marine 220 / 220A Replacement Oil Pump, ZF Marine 286A / 286IV Replacement Oil Pump, Split Hub Propeller Shaft Coupling Kit (ZF 63/68 A/IV, Velvet Drive), Split Hub Propeller Shaft Coupling Kit (ZF 220 A/V/IV), Split Hub Propeller Shaft Coupling Kit (ZF 800 80 85 A/IV, ZF 220PL, 280A/IV, 286A/IV, 301, MG506 5061 507), Split Hub Propeller Shaft Coupling Kit (MG 509), Cummins Marine Engine Warranty Information, Marine 316L SS 4 inch Pipe (4.5 OD) 90 Degree Elbow, Checking & Changing the Oil on your ZF Marine Transmission, How to Check the Oil Level in a ZF ATF style Gear, Oil Capacities and Dip-Stick Readings for ATF ZF Transmissions, Marine Age the REAL age of a Marine Diesel Engine, Propellers Move Boats, Engines Just Turn Them, Everything you Need to Know About Marine Exhaust Systems, Continuous Duty A Different Perspective. Also cleaning the charge pump . Shift: Mechanical Shift, Electronic Shift 12V, 24V Twin Disc creates over 100 marine transmission models ranging in horsepower from 35 to over 4000. Configuration: 8 Degree Down Angle, Transmission Manuals By continuing to browse this website, you agree to the use of cookies. Condition: New You can also change some of your preferences. Ratios: 3.0 Years of experience as an OEM supplier, a proven spare-parts service and, last but not least, our excellently trained employees guarantee your satisfaction and the best repair for your vehicle. Its possible that theres a seawater leak. Shift: Mechanical Shift, Electronic Shift 12V, 24V When dealing with Seaboard Marine, remember that you are dealing with a companythat supports what we sell you, is a listed ZF Marine factory warranty station and certified ZF Marine dealer that you can talk to on the phone or visit our facility. Ratios: 1.65 Tried-and-tested quality and technical superiority: based on requirements, current market value or at a fixed price. So your boats marine gear has three functions that are completely different from your cars transmission. Seaboard Marine delivers Guaranteed Better Than Factory Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. Model: ZF 286A What we are NOT issome totally obscure E-bay vendor with that E-bay Shield, or a parts counter monkey. It will aid the transmissions shifting in all climates because of its anti-slip properties. We need 2 cookies to store this setting. Click to enable/disable Google Analytics tracking. ZF is recognized by its customers as an outstanding and reliable partner for both marine propulsion components as well as complete systems for all types of vessels. Higher horsepower units are available, please call or E-mail for price. For mechanical engines and gears, do I require an additional actuator with the systems processor unit? If there is no tag present, the best way to find out what transmission you have is to take digital pictures, upload them to an image hosting service such as Imgur or PhotoBucket, and. The work is not difficult - it just needs to be done. This causes more wear and tear than when cruising. Internal defects have been few and far between in its over ten years of use, with many of them user-related. Otherwise you will be prompted again when opening a new browser window or new a tab. Replaces: ZF 220A, IRM 220A ZF Marine Transmission Dip Sticks; USCG Approved Engine & Gear Hydraulic Hoses; ZF Piston Rings; ZF Marine Transmission Oil Drain Line Kit; ZF Clutch Kits; ZF Torsional Couplings. ZF 500IV Ratings & Specifications After the initial filling or after carrying out repairs or changing the oil filter, run the gearbox for about twominutes. Warranty: 2 Year Pleasure, 1 Year Commercial Condition: New After moving the lever for about 2 seconds, the transmission delay occurs. ZF presents innovative solutions for marine driveline and applications at the largest and most important fairs worldwide. Experience the next generation marine mobility, Read more about digital solutions for vessels, Read more about hybrid technology for marine propulsion systems, Learn more about commercial and fast craft, Learn more about pleasure craft and yachts. If this FAQ section did not answer your question, pleasecontact us. ZF Electric Shift Solenoid Information. ZF - HURTH transmission in my 346 Carver - knocking sound when idling in gear, at 1200 rpms - quiet - at 3000 rpms same sound and motor starts to lose power. Click to enable/disable Google reCaptcha. By continuing to browse this website, you agree to the use of cookies. ZF 68IV Ratings & Specifications Leaks usually come from a failing transmission oil cooler, so it may be a good idea to replace that at the same time. All transmissions will have an identification tag somewhere on the top or side from the factory. ZF Transmissions All Models Full Set Manuals - Aiostm-All Data Repair Since these providers may collect personal data like your IP address we allow you to block them here. First of all, slip is built into the marine system; there is no positive physical link between your propellers and the water such as there is between your tires and the pavement. The oil level check must be done two minutes after turning off the engine. A typical diesel rotates at around 2000 rpm at cruise setting. Hurth 5-10-20 Service Manual. Condition: New For the ZF6 transmission, the manufacturer recommends Mercon ATF. Configuration: 15 Degree V-Drive, Transmission Manuals Use of Cookies: ZF Friedrichshafen AG uses cookies to continuously improve the website and optimize its design. Too much throttle in the reverse gear is a common cause of transmission failures. Warranty: 2 Year Pleasure, 1 Year Commercial Model: ZF 280IV However, it wont get to the bottom of the issue. 11.5, ZF Transmission Adapter Plate SAE#3 for 45A, 63/68A, 63/68IV, ZF Transmission Adapter Plate SAE#3 for 80A, 85A, 85IV, ZF Transmission Adapter Plate SAE#4 for 45A, 63/68A, 63/68IV (Volvo D4/D6), ZF Transmission Adapter Plate SAE#3 for ZF 220A, ZF Transmission Adapter Plate SAE#3 ZF 220A & IRM280 (Old Style), ZF Transmission Adapter Plate SAE#3 CAT Engine for ZF 220A, ZF Transmission Adapter Plate SAE#3 for ZF 280A/IV, ZF Transmission Adapter Plate SAE#3 for ZF 285A/IV & ZF 286A/IV, Transmission Adapter Plate to Bellhousing Bolt Hardware Kit, SMX Transmission Spacer for Borg Warner Velvet Drive, ZF Marine Mechanical ATF Series Shift & Troll Valve, ZF Marine Electronic ATF Series Shift & Troll Valve, ZF Marine Electric EB15 Shift Valve with Trolling Valve, ZF Marine Mechanical Trolling Valve (ZF 280+), ZF 220/A Marine Mechanical Trolling Valve Kit, ZF ATF 63 A/IV 85 A/IV Electronic Progressive Shift Solenoid, ZF ATF 63 68 A/IV 80 85 A/IV Electronic Shift Solenoid, ZF EB15 Electronic Shift Solenoid (TROLL), ZF EB30/31 Electronic Shift Solenoid Coil, ZF ATF 63 A/IV 85 A/IV Electronic Troll Valve Coil, ZF Electronic Shift Solenoid Wire Plug/Cap, SMX Marine Transmission Drop in Screen Filter 45/63/68/80/85 A/IV Series ATF, Fleetguard LF701 Lube Filter for ZF Gears, Genuine ZF Marine Oil Filter Transmission (3213308019), ZF Marine 25A, 45A, 63A/IV, 80A/IV Input Shaft Seal, ZF Marine 63IV Inner (Small) Output Shaft Seal, ZF Marine 63IV Outer (Large) Output Shaft Seal, ZF Marine 80IV/85IV Inner (Small) Output Shaft Seal, ZF Marine 80IV/85IV Outer (Large) Output Shaft Seal, ZF 63A/IV 68A/IV 80A 85A SMX Marine Transmission Mounting Brackets, ZF 85IV SMX Marine Transmission Mounting Brackets, ZF 220A SMX Marine Transmission Mounting Brackets, ZF 280A ZF 280-1 ZF 220PL SMX Marine Transmission Mounting Brackets, ZF Marine 220 / 220A Replacement Oil Pump, ZF Marine 286A / 286IV Replacement Oil Pump, Split Hub Propeller Shaft Coupling Kit (ZF 63/68 A/IV, Velvet Drive), Split Hub Propeller Shaft Coupling Kit (ZF 220 A/V/IV), Split Hub Propeller Shaft Coupling Kit (ZF 800 80 85 A/IV, ZF 220PL, 280A/IV, 286A/IV, 301, MG506 5061 507), Split Hub Propeller Shaft Coupling Kit (MG 509), Cummins Marine Engine Warranty Information, Marine 316L SS 4 inch Pipe (4.5 OD) 90 Degree Elbow, Marine Age the REAL age of a Marine Diesel Engine, Propellers Move Boats, Engines Just Turn Them, Everything you Need to Know About Marine Exhaust Systems, Continuous Duty A Different Perspective. Reverse reduction marine transmission with hydraulically actuated multi-disc clutches. You can go towww.northwayproducts.com, or contact them atemail@northwayproducts.comor425-493-1127. Ratios: 2.90 We use cookies to let us know when you visit our websites, how you interact with us, to enrich your user experience, and to customize your relationship with our website. Here are some good-quality valves that you can try for your ZF transmission. PDF ZF 63 A - Marine Parts Express We need 2 cookies to store this setting. View PDF technical documents, manuals, and more for ZF Marine and Hurth marine transmissions. 33. Shift: Mechanical Shift, Electronic Shift 12V, 24V The ZF . The ZF Aftermarket repair services give you the planning reliability you need. It's also reassessing your transmission, your propellers, and your controls. AMGS has a vast inventory of used and obsolete Marine Transmission parts and accessories. Visit our digital showroom and learn more about our latest innovations. Solenoid Valve Block with Plug Removed. ZF Marine offers to reverse non-reversing and hybrid transmissions. Call an agent to order. When an engine idles or is run at low rpms, it creates more vibration for the transmission, as the firing impulses are farther apart. PDF Zf Transmission Repair Manual 6 S 85 - Yearbook2017.psg.fr Shift: Mechanical Shift, Electronic Shift 12V, 24V So when you hammer your throttles, your engines dont stall or balk. Our ZF Aftermarket maintenance service for commercial vehicles, construction machinery, tractor, utility vehicles, passenger cars and more provides you with reliable error diagnosis and professional repair or replacement of units from a single source on-site too if required. Also, check to see if the shift arm moves and clicks easily. Ratios: 1.23, 1.53, 1.75, 2.0, 2.45 Alternatively, it can be done every six years. Zf Marine Transmission Troubleshooting - Facing Trouble With Your ZF 85IV Ratings & Specifications Ratings apply to marine transmissions currently in production or in development and are subject to change without prior notice. A major cause of gear clatter is a poor alignment of the drive unit and prop shaft. Condition: New You always can block or delete cookies by changing your browser settings and force blocking all cookies on this website. EB 30 solenoid Valve Block 5 x O-Rings. A compression check is a must before putting any blame on the transmission. Not only mechanical engine and gear, but also mechanical engine with electric gear, and electronic engine with mechanical gear. 1) engine cooling system problem- air bubbles or airlock. Configuration: 12 Degree V-Drive, Transmission Manuals Small-Medium Transmission Range - ZF Access Free Zf301a Marine Transmission Manual Read Pdf Free - shop We stock a wide range of parts as well as complete new and rebuilt transmissions. "A lot of people lump the transmission in with the engine. ZF Solenoid Plug EB15 & EB 30 Plug Terminals. Everything about your ZF automatic transmission issues Please contact an Account Manager or call one of these locations: Use of Cookies: ZF Friedrichshafen AG uses cookies to continuously improve the website and optimize its design. Benefit from the expert among the diagnosis tools and find faults quickly and reliably. Vessel Systems Considerations for Marine Repower, ZF Marine Propulsion Systems Miramar, LLC. There can be many common problems and causes for your ZF transmission troubleshooting. There can be many common problems and causes for your ZF transmission troubleshooting. Repair Manual ZF 63 A thru ZF 85 A Repair Manual ZF 45 C ZF 63 C ZF 88 C Repair Manual ZF 63 IV ZF 80 IV Repair Manual ZF 220A - ZF 225 A Repair Manual ZF 3M 30M. Service information, useful tips and more - find all important technical information at a glance! As previously stated, the ZF transmission is extremely reliable. Generally once every 6 months (twice a year) is safe. Condition: New Because the pump generates heat as it pressurizes the oil, every marine transmission also must have an oil cooler, which is typically mounted on the outside of the transmission housing and is identifiable by the water hoses leading into and out of it. There may be additional issues that you must deal with. Clogs in the charge pump are possible. PDF Zf286a Marine Gear Maintenance Manual - Gitlab.dstv.com Pretty exciting stuff, huh? Model: ZF 85IV Oil coolers can become corroded and blocked, and drive plate springs/dampers can become worn and less effective. ZF 286A Ratings & Specifications Transmissions ZF Marine - problems - Boatdiesel.com Check to enable permanent hiding of message bar and refuse all cookies if you do not opt in. Because these cookies are strictly necessary to deliver the website, refusing them will have impact how our site functions. Control Systems & Electronics - ZF Marine Propulsion Systems ZF Marine is the global market leader for the design and development of complete drive systems for all ship models. The shift is easily removed with a screwdriver. 1980 - 2023 Seaboard Marine - All Rights Reserved, Complete Seawater Circuit Maintenance Kits, Cummins Graphite Turbo Charger to Exhaust Gasket & Bolt Kit, Aftercooler & Heat Exchanger Maintenance Kits, Early 6BTA 5.9 Diamond Hoses (1.5 Raw Water Hoses), 6CTA 8.3 430/450/480CE Diamond Engine Hoses, USCG Approved Engine & Gear Hydraulic Hoses, USCG Approved High Pressure Hydraulic Oil Lines, EnviroVent Crankcase Ventilation (CCV) Kits, Marine Silicone Exhaust 6 x 8 Reducing Hump Hose, Custom Marine Exhaust Design & Fabrication, Marine 316L SS 4 inch Pipe (4.5" OD) 90 Degree Elbow, Marine 316L Stainless Steel 4 inch Exhaust Pipe (4.5 OD), SMX Custom Stainless Steel Exhaust Mixer Kit, 90 Degree Exhaust Elbow Wrap (Long Radius), SMX Mechanical Engine Digital Display Kit, SMX J1939 SeaView Double Digital Display Kit, Glendinning Throttle & Shift Control Systems, ZF220A & ZF220V Shift Valve Lever Repair Kit, SMX Custom Exhaust Flange Kit for Cummins Engines, Borg Warner Velvet Drive to Cummins 5.9 HD Adapter Kit, Commercial Marine Hydraulic Pumps & Equipment, PetroWrap Anti-Corrosion Tape (2 in. Warranty: 2 Year Pleasure, 1 Year Commercial And rust begins to stifle its movement. You could be blaming the oil for the problem. But it may not be the case in this situation. (877) 621-2628 HOUSING ADAPTER KIT B/W 3307116001 The following cookies are also needed - You can choose if you want to allow them: This field is for validation purposes and should be left unchanged. Or maybe the shifting is a little bit, Stuckey. So, its possible that the lever isnt going all the way into gear. Configuration: 10 Degree V-Drive, Transmission Manuals To contact ZF Marine directly, please fill out the form or call us. Then you may have a transmission issue. User Manuals - ZF Marine Propulsion Systems Miramar, LLC Wondering about ZF marine transmission troubleshooting? It can be a slow-shifting problem you may face. ZF quality control complies with ISO 9001 standards. Each marine transmission has an internal oil pump that generates hydraulic pressure, which forces these clutches together to provide engagement. To provide you the best experience using our services and prevent security risks, please upgrade to Microsoft Edge or another browser like Google Chrome or Mozilla Firefox. Part number 3312001204. Condition: New Shift: Mechanical Shift, Electronic Shift 12V, 24V Weve been serving local Ventura County, California since 1980 as a custom boat builder, repower specialist, designer, and supplier of equipment to builders, commercial fishermen, and recreational users. Warranty: 2 Year Pleasure, 1 Year Commercial Find a Genuine ZF Commercial Thruster Service Dealer. Yet because this simple but durable device is so critical to getting you where you want to go safely and efficiently, you really ought to have some idea of what it does and how it does it. Click on the different category headings to find out more. Lets get back to another common problem that generally ZF transmission users face. Condition: New Most expensive repairs start from a lack of basic maintenance or ignoring small warnings. EB30 Valve Block without Solenoid Coils. Trust yourself. (ZF makes a two-speed marine gear.). You will lose functionality such as Synchronization and One Lever Mode. 3) worn out Torque converter clutch slipping overheating . Condition: New It can be a slow-shifting problem you may face. Configuration: 14 Degree V-Drive, Transmission Manuals Model: ZF 280-1 While attempting to shift into first gear you may believe the issue is limited to the cable. Can I replace just one of the processors with a new ZF processor? The phenomenon is due to irregularities during the ignition and combustion process which occur at low engine speeds. EB 30 Solenoid Valve Block. Replaces: ZF 85A, Hurth HSW800A Changes will take effect once you reload the page. And believe me, you are not alone. Plunger in the DOWN position is Normal. Do you have any trouble moving your arm? Shift: Mechanical Shift, Electronic Shift 12V, 24V Click to enable/disable _gat_* - Google Analytics Cookie. We may request cookies to be set on your device. the Zf301a Marine Transmission Manual, it is totally easy then, back currently we extend the link to purchase and create bargains to download and install Zf301a Marine Transmission Manual fittingly simple! Click to enable/disable _gid - Google Analytics Cookie. Configuration: Co-Axial, Transmission Manuals Transmissions:ZF Marine. New oil is mostly transparent. Model: ZF 301A After successfully establishing its inboard and outboard propulsion technology for all ranges boats and yachts in the market, marine driveline specialist ZF is now bringing unrivalled performance At this years marine trade convention SMM, ZF is unveiling the hybrid version of its ZF AT 80 thruster system. Replaces: ZF 280IV, IRM 280V Our marine transmission department specializes in sales, repair, and remanufacturing of Velvet Drive, Borg Warner, ZF Marine, Hurth, Paragon, Walters, Pleasurecraft, Twin Disc, Volvo Penta, Yanmar, and Kanzaki transmissions. Replaces: ZF 286IV, IRM 286V Click on the different category headings to find out more. Configuration: 7 Degree Down Angle, Transmission Manuals Replaces: ZF 280-1, IRM 280 The purpose is so that we can enjoy our boat for all the reasons we bought her. ZF offers a wide range of lightweight and robust transmissions suitable for all types of engines and propulsion systems, covering every application, such as motor yachts, cruisers, watersports boats and sail boats, but also patrol boats, fishing and small commercial vessels. Typically we recommend replacing both at the same time. Condition: New After four years of partnership and collaboration, the new engine . As a continuous innovator, ZF is preparing for the next generation of marine propulsion systems with, In light of the increasingly strict regulations at sea and in ports, the future of shipping belongs to, Reliable, robust and efficient With its high-performance transmissions, propellers, thrusters as well as control and steering systems, ZF Marine always offers the right solution. A wide variety of transmissions for engine outputs of up to 1,500 hp . Read more Social media Follow us and be the first to know the latest news. Microsoft has terminated updates and support for Internet Explorer . Seawater would dribble onto the transmissions shifter arm. Ratios: 2.32 Please be aware that this might heavily reduce the functionality and appearance of our site. ZFs Microcommand and Clearcommand control systems use a combined processor/actuator unit. ZF 280-1 Ratings & Specifications Ratios: 1.48, 1.75, 2.0, 2.47 The issue could be with the transmissions heat exchange hose. Condition: New As a rule, gear clatter is the result of an unfavorable interaction of individual components, such as engine, couplings, gears, propeller shaft, and propeller. Spray rust around the shaft and work the arm until it easily moves and clicks. Configuration: 15 Degree V-Drive, Transmission Manuals INTRODUCTION This manual gives specific instructions for the proper repair on ZF 63 - ZF 63 A - ZF 80 A - ZF 80-1 A - ZF 85 A transmissions. Following this, recheck the oil level two minutes after turning the engine off. Its also possible that the shifter cable has to be changed. Replaces: ZF 68A, Hurth HSW630A Propelling Forwards: New POD Propulsion 4600 System from ZF. Ratios: 2.45 Now., and the strategy With TotalCommand, ZF brings a brand-new marine control system to market that offers unrivalled cruising and manoeuvrability performance for a wide range ZF Marine presents its new 2-speed transmission, an industry-first, as part of the new V12 Verado Outboard engine developed by Mercury Marine. But you could be mistaken, changing the cable might not help. Yes, the ZF 8-speed transmission is a good choice. Have someone inspect the shift lever on the transmission while someone else shifts the transmission (this can be done with the engine off). Transmission noise is most commonly caused by a poorly running engine or a worn out drive/damper plate. There could be a problem with your ZF transmission. Shift: Mechanical Shift, Electronic Shift 12V, 24V ZF 286IV Ratings & Specifications Ratios: 1.5, 1.75, 2.0, 2.5 For a comparatively simple device, the marine transmission does a lot of work. The delay could be between 2 and 4 seconds. These cookies are strictly necessary to provide you with services available through our website and to use some of its features. A transmission problem can be devious: When an engine fails, the propeller stops spinning, but a neglected transmission could lock into forward or reverse. ZF HURTH MARINE recommends to read the manual completely before starting with repairs, as some of the procedures described are rather complex. There can be many common problems and causes for your ZF transmission troubleshooting. It has a power range of 10 to 12,000 kilowatts in commercial use. You must be still out in the blue about this matter. Quiet operation with helical gearing is provided by their advanced marine transmission technology. And you are facing trouble with your transmission. It's really a repropulsion. Configuration: 10 Degree Down Angle, Transmission Manuals One is to engage and disengage the engine from the propellerin other words, to provide neutral. Download free checklists here In forward and reverse, there is full power and identical reduction ratios. ZF Marine's State of the Art Control Systems Over 50 years ago we introduced the industry's first single lever control systems, and we have been designing and manufacturing control systems for commercial marine vessels, yachts, and pleasure boats ever since.