Fuel/oil mix after rebuild

R

rude70

Seaman Apprentice
Joined
Mar 6, 2006
Messages
45
I have a 1990 90HP which I am nearly finished rebuilding. Two cylinders have been bored 40 thou the other two honed so two new pistons and for sets of rings, also new Conrod big end bearings. VRO disconnected, I think I have read somewhere that mix should be 25:1 for first 10 hours after rebuild, also no more than half WOT. Any advice? Thanks
 
Bob_VT

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
Joined
May 19, 2001
Messages
26,022
Re: Fuel/oil mix after rebuild

Running extra oil will not hurt and yes I have heard the same thing before. A little extra smoke for a tank or so will not hurt anything.
 
H

hidef

Lieutenant
Joined
Aug 22, 2009
Messages
1,465
Re: Fuel/oil mix after rebuild

Correct the factory specified running 25:1 for the first ten hours when breaking in a new or rebuilt outboard.
 
W

willy007

Seaman
Joined
Jul 10, 2013
Messages
74
Re: Fuel/oil mix after rebuild

hidef said:
Correct the factory specified running 25:1 for the first ten hours when breaking in a new or rebuilt outboard.
Click to expand...

+1 After everything is done it needs the additional lubrication until the metal smooths out
 
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