Yamaha 2006 25 HP tiller

[porknose1234]

I am changing the base friction plate fiber ring on the base plate, does this go on dry with no lube? Also what is the purpose of the Diaphragm that the Magneto control lever rests against and how do I know if it's operating properly and set correctly in its slots?

 

[boscoe]

No lubricant on the friction plate.

I suspect the diaphragm is acting as a dashpot to slow down the rate of the carburetors closing. The SM describes how to adjust the diaphragm. If needed. If the motor does not stumble or die when you quickly retard the throttle to idle I would suspect that the diaphragm is adjusted and working correctly.