Outboard motor lower unit problems

Most outboards have four to seven nuts or bolts. Issue 3 - Three Prong Clutch Dog Some gear sets were designed to be used with a three prong clutch dog.

Remove all of the nuts holding the lower unit in place.

Outboard motor lower unit problems. Lower unit problems on an outboard can start off small and snowball into a debilitating mechanical issue that stops your boat cold. Identifying problems early cuts repair costs and in some cases can keep you from having to replace the lower unit altogether. Here are some outboard lower unit troubleshooting tips and videos to get you started.

With three distinct sections of the outboard motor its essential to determine when something has gone wrong with the lower unit or one of the other areas. Bad outboard lower units can give the operator shifting issues and other signs will include water in the gear lube metallic particles on the drain screw magnet clunking sounds when shifted or the loss of the ability to shift into gears. Dealing with lower unit issues on your outboard.

Outboard engine lower unit leaks often result from a broken propeller seal. The operator should replace the seal and flush the oil to resolve the problem. Gear Problems If the outboard motor slips out of gear the shift rod linkage or linkage connecting to the lever that allows the operator to manually change gears may be to blame.

This is not particularly an issue of Evinrude G2 models it can occur with any outboard motor brand. Lower unit leakage or water in the outboard motors lower unit can occur because of excess corrosion on the lower unit components or if one or more parts terminals of the lower unit are broken or damaged. 35 hp Force 357f7b Impeller lower unit problems Heres another update.

After shaking and pulling for quite some time I finally separated the lower unit from the motor. I am a little confused now. The shaft stayed in the motor so the only thing sticking up from the lower unit is the water tube.

The first step in this process is to start the engine and disconnect the fuel line. Then let the engine idle until it runs out of fuel. Next place a rag under the carburetor and open up the carb drain screw.

Once all the remaining fuel has drained away the engine can sit for several months without any issues. Remove all of the nuts holding the lower unit in place. Most outboards have four to seven nuts or bolts.

If your socket doesnt fit use a ring wrench instead. If the lower unit is free remove it. Otherwise you might need to give it a few taps with a soft mallet.

Just dont hit the flange cavitation plates or they will break. Depending on the year of motor the lower unit as seen in the RH photo below can have different water escape around the copper tube from the water pump. Motors in at least the 74-76 range have a different water escape in that the hole where the tube enters is simply made oversize by about 18.

Outboards are self draining so as long as the motor is down it will drain. Start and shut it off a couple of times and you will be fine. Check the lower unit before freezing temperatures arrives a d if it is good you should be good to go.

Brian Klawitter Keymaster MinnesotaWisconsin Mississippi River. Mercury Marine has announced a 600 horsepower V12 outboard with some inovations. Steering is by the lower unit gearcase piviot not the entire engine.

It has a two-speed transmission with shifting controlled by the engine controller and a hood which opens for engine checks and servicing without removing the entire cowl. Your lower unit may have had problems over the years or have a larger issue and be completely out of commission. A replacement lower unit can help you avoid the expense and uncertainty of a complete rebuild.

Back to the original specs the original performance the original thrills. The water pump pushes water up through the engine to keep it cool. The water pump assembly is attached to the drive shaft and uses the rotation of the driveshaft to power the water pump.

As the driveshaft rotates it. An outboard motors lower unit is extremely vulnerable to wear and tear due to constant exposure to great forces and various factors underwater. This is why it is important to carefully inspect your engines lower unit before and after every trip for possible signs of damage.

Outboard motor lower unit diagram impremedia 6 mercury outboard motor lower unit diagram impremedia net charming mercury lower unit wiring diagram best image Mercury Outboard Lower Unit Diagram Mariner 15 Hp Outboard Parts Diagram New Fuel Management System. If you just resealed your 95 Hp outboard lower unit and then reinstalled it only to find out your lower unit isnt shifting into gear dont worry its probably a simple fix since it could only be caused by a few components. The following describes the potential problem areas from the.

Lower Unit Outboard Motor Maintenance. Lower Unit Outboard Motor Maintenance. Posted on June 11 2015 January 26 2021 by Andrew Gardner.

Your lower unit is the difference between cutting through the waves and being dead in the water. Take good care of it with Blains Farm Fleet. Today while up and running all of a sudden the motor reved up with a loud grinding noise.

After stopping and restarting engine I have no propulsion in fwd or rev. Still hear grinding noise when engine is running. After being towed in I checked lower unit grease it is clean and no metal shavings.

With motor in gear you can. Not using a ball detent will cause the motor to fail fast and the lower unit to jump out of gear. Comparing your motors OEM gearcase part number in the chart below to other years and horsepower driveshaft numbers will alleviate this issue.

Issue 3 - Three Prong Clutch Dog Some gear sets were designed to be used with a three prong clutch dog. Continuing to run the motor while still damaged will cause problems to other inboardoutboard components. The lower unit will need repairing pronto and it wont be cheap.

If you see extensive damage to this part avoid buying the boat or be prepared to shell out tons of money to fix it.