High Revs low speed

Taz59

Petty Officer 1st Class
Joined
Apr 10, 2003
Messages
304
Over the season it’s getting worse, been struggling to get up to speed,revs are really high and struggling to reach 25rpm
and when revs reach over 4K you can see white smoke coming from prop area,Engine temp is normal and engine sounds sweet,Oil temp is ok, I thought it might be the props slipping on the hubs but I marked them and their not slipping,is there anything in the outdrive that could slip,The drive is a reconditioned one that got fitted last year.

Ran the engine in neutral at high revs and no smoke, anything else I could check

any help appreciated
 
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