Just received the evinrude piston stop.how do I set the depth of the plunger to find top dead center of the #1 piston?
Thanks for the help
John
Just received the evinrude piston stop.how do I set the depth of the plunger to find top dead center of the #1 piston?
Thanks for the help
John
Twin 200 2005 Mercury Optimax Engines
1B191661
1B160290
One most engines, you would use a degree wheel, or a graduated ruler on the flywheel, and a fixed pointer.
Rotate the engine until the piston comes up against the piston stop, and note the position on the degree wheel/flywheel. Rotate the engine in the opposite direction until the piston hits the stop again, and note the position on the degree wheel/flywheel. Remove the stop. Halfway between these two points is TDC.
Perhaps Evinrude has a different, motor specific way to do it, but that's the method in a nutshell.
Twin 200 2005 Mercury Optimax Engines
1B191661
1B160290
That's why the method he described is commonly used, it doesnt matter how deep the stop is set you will always get the same answer, TDC, if you follow the procedure.
But like he also said, OMC might use a different method, I forget as the only time I checked my old one was years ago
2021 Phoenix 920 Elite / SHO 250
Bullet 21XD / 250 XB (Gone to a great home in LA)
"There is no such thing as a bad day fishing!"
Never turn the motor(outboard) the opposite direction. There is a specified way described in all OMC service and repair manuals. Not the same as a 4 stroke car motor. The only time you can do it backwards is when the powerhead is not attached to the mid and lower or the lower unit and water pump assembly are removed. Go by what your OMC service manual says in the synchronization and timing section..
Age and treachery will always overcome youth and skill !!
Remove sparkplugs. Turn motor by hand untill piston #1 has moved 1/2 " down past TDC. Insert piston stop tool, and adjust screw till it touches piston top. Lock Screw, and holding piston back against stop tool, make a pencil park on flywheel exactly at pionter. Turn motor clockwise till piston touches tool again, make another mark. Using a Flexible Scale, mark exact center between the two marks on flywheel. Turn motor to pionter is against the new center mark. Adjust pionter position to point against the original TDC mark in flywheel. Pointer now is correct/TDC. This is the common way but be sure to check the manual for your specified motor.****Never turn counter clockwise/backwards from normal rotation****
Age and treachery will always overcome youth and skill !!
2021 Phoenix 920 Elite / SHO 250
Bullet 21XD / 250 XB (Gone to a great home in LA)
"There is no such thing as a bad day fishing!"
Thanks every one thats what I needed to know!
Twin 200 2005 Mercury Optimax Engines
1B191661
1B160290