So close to sink it :)

[Goran_SV]

Again me, and again 2001. Yamaha 2T 50HP.

Today I tried to find out which cylinder is fu*ked up, so I tried the following:

Removed spark plug caps, trimmed wires for about half inch, and returned spark plug caps - boots.
Everything remained the same, won't go over 2500RPM. So it isn't the connection wire / boot.

Next test... tried to pull off cables while the motor was running. Pulled from 1st cylinder, other 2 worked as before, kinda grumpy. Pulled from 2nd cylinder, other 2 were grumpy. Pulled from 3rd cylinder... and yes, other 2 were grumpy.

Ok, next... puled off 2 cables, leaving just 1 cylinder working. 1st worked well, 2nd worked well, 3rd worked well. No matter what cylinder remained, all of them worked fine when just 1 cylinder is working.

By the way, they work ''cleaner'' when only 1 cylinder is working, then any other combination (2 or all 3 cylinders working)

[boats.net]

Run a compression test to see if all cylinders are even, test warning buzzer by grounding pink wire on temp sensor, with key on buzzer should sound. Check timing at WOT, check carbs are clean and synced properly.