madhatter
31.05.2021 14:52:26
Insert two bolts into the threaded holes on top of the flywheel. Insert a pry bar in between the bolts so you can prevent the flywheel from turning. here
See full version: How to Remove a Mercury Flywheel
Insert two bolts into the threaded holes on top of the flywheel. Insert a pry bar in between the bolts so you can prevent the flywheel from turning. here
Unlatch the clips that are used to secure the cover and take the cover off the motor. more
Loosen the flywheel nut by using an impact wrench. Once the nut is loose remove the impact wrench and turn the flywheel nut by hand to remove it. [links]
The flywheel on an outboard will need to be removed when repairs are needed such as the motor not starting properly. In order to access the crankshaft of the motor the flywheel will need to be removed from the engine. You can remove the flywheel from a mercury outboard motor by keeping the flywheel stationary and using a special tool called a flywheel puller.
Thread the flywheel puller onto the flywheel and tighten it with an adjustable wrench.
Re: What size nut on a 90hp flywheel ? more
All three and four cylinder engines used the same flywheel until Merc started putting on their ignition. Even then, I think Merc used the same flywheel for 2,3,and 4 cylinder engines. Use a steering wheel puller or harmonic balancer puller and thread three 1/4 X 20 bolts into the holes on top of the flywheel. If you have an impact air gun they will usually pop the flywheel quite nicely. If you do not have one, torque the center bolt really tight and smack the top a few good shots with a heavy hammer--16 oz will not do. If that doesn't do it, use a propane torch and heat the center of the flywheel. She will jump up with a bang. [links]
Re: What size nut on a 90hp flywheel ?
I used the exact gear puller like JerryJerry. It was a loaner tool from Autozone But after a careful inspection of the two flywheels, the 90hp I have got a smaller crank shaft than the 120hp flywheel. I think its because the 120hp flywheel was from the '96 model which then they changed a few things. The 90hp flywheel is from a '94 engine.
OK, Let Us Get Right With it ;
But, for those who are new to the older engines having a magneto ignition, points are a different animal altogether, and even though you can get spark, and the may engine run, it may not be optimum unless the points are careful set and checked against the timing marks on the timing plate. Failure to do so can result in poor engine performance, a huge difference in smooth trolling idle and top end power with possible detonation under high loads, plus poor fuel economy. OK, you may luck out on the first try, but even a blind squirrel finds an acorn at times.
You will note in the photo below that this old motor has had the flywheel nut rusted to the crankshaft, the owner who lived near saltwater allowed this motor to set outside for a number of years. When he tried to remove the flywheel he did not realize it was rusted TIGHT and twisted off the threaded end of the crankshaft. Now he is hopeful that I can weld a new threaded end back onto the crankshaft. . . He was thoughtful enough to save the broken parts. This is a old Elgin of a vintage of about 1955 which has the fuel tank around the flywheel. here
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