YAMAHA 2 STROKE 85HP,AE 688 (year unknown)

[junaidi]

Just bought the outboard engine as above,problem is 1.at idle the engine is shaking but still on,2.the engine seems to be no power or the rpm is not increasing even the throttle is fully forward during sea test,3.there is some noise from the mid engine during start.I'm willing to repair it myself,any advice or guide.TQ

[boats.net]

Start with a compression test to see if all cylinders are even.

[junaidi]

dont have that compression equipment test in our area,any suggestion or other technique?

[junaidi]

already cx the compression manualy and the no 1 cylinder seems to be lack of compression.what should i do?