HI All,
My friends Yamaha 15hp 2 stroke is doing funny things. It runs fine but keeps dropping revs for no reason. It will run for 10 minutes at full revs and then drop to about half power for another 10 minutes then run fine for 5 minutes then drop for 5 etc. It never stops even though it drops revs.
Checked all the throttle cables etc and they all are fine. If it was a 4 stroke I would say it was dropping into safe mode but its a 2 stroke. Fuel has been checked for dirt etc and all is good there. Anyone got any ideas?
Many thanks
Caz