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flay wheel
- Thread starter lilpain
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DooWacka
Active Member
removing a '96 flywheel
I believe that since the 787 motor is very similar to the 687, you can use a little trick I learned from a Seadoo mechanic. Of course you have to remove the magneto cover. I assume you want to know how to remove the nut holding the flywheel to the crankshaft. If you then remove the airline nearest the Mag (underneath the Mag carb), you can slide a long "pin" into the tube opening. This airline provides the "pulses" to run the fuel pump. I used to use a large nail, like a fat 16 penny with the point ground off. Rotate the crank (easier without the spark plugs) until you feel the pin drop into a slot provided in the Mag piston crankshaft throw. This "locks" the crank in place and allows for easy flywheel nut removal with the proper socket and a breaker bar.
I believe that since the 787 motor is very similar to the 687, you can use a little trick I learned from a Seadoo mechanic. Of course you have to remove the magneto cover. I assume you want to know how to remove the nut holding the flywheel to the crankshaft. If you then remove the airline nearest the Mag (underneath the Mag carb), you can slide a long "pin" into the tube opening. This airline provides the "pulses" to run the fuel pump. I used to use a large nail, like a fat 16 penny with the point ground off. Rotate the crank (easier without the spark plugs) until you feel the pin drop into a slot provided in the Mag piston crankshaft throw. This "locks" the crank in place and allows for easy flywheel nut removal with the proper socket and a breaker bar.
DooWacka
Active Member
PTO flywheel removal
The '90 SP should be the same with the 587 motor. I guess I also assumed you meant the flywheel at the front of the motor with the magneto and gear teeth for the starter. If you meant the smaller rear PTO flywheel, you can use the same pin method, but take off the PTO grease fitting then you can use a large pipe wrench without damaging the fitting.
The '90 SP should be the same with the 587 motor. I guess I also assumed you meant the flywheel at the front of the motor with the magneto and gear teeth for the starter. If you meant the smaller rear PTO flywheel, you can use the same pin method, but take off the PTO grease fitting then you can use a large pipe wrench without damaging the fitting.
DooWacka
Active Member
I've tried it both ways. Stuffing a rope in the spark plug hole, and using the pin. The pin method is a lot better. You can usually pull off the air hose without removing the Oetiker clamp, then just shove it back on when done. The "nail" works well since you can leave the head on so it won't get lost down the hole, and it is about the correct length. To long of a pin and it is difficult to get past the carb, but to short and it won't engage the slot in the crankshaft throw.
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