so i better check each time the core plugs, is there a way to secure them better?
Only drived the boat once with to small prop, i think i had then about 15psi water pressure...
Is the crank that bad? and what do you need to weld?
Will take a look at the tuner when i take the block of the shaft.
When searching for info over the yamaha ces, found alot of your posts fred...
Seems you have alot of experience with this motors...
Why should it have that serial nb on the case?
To fit the the 90hp carbs on the 70hp engine, i assume you make the holes off the reed plate bigger?
no Further suprises when mounting the carbs?

Its difficult sometimes with these technical terms