1990 Merc 90 rebore cracked oil lines

gljnr1983

Cadet
Joined
Nov 20, 2011
Messages
8
Hello all i am working on a merc 90 that had cracked oil lines and it had partially seized scorring the bores so i was wondering if anyony knows what is the max i can get these sleeves bored out to,as it looks quite deep.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,589
Re: 1990 Merc 90 rebore cracked oil lines

You can bore that engine up to.040 oversize... those are recirculation lines and highly unlikely to have caused this problem
 

gljnr1983

Cadet
Joined
Nov 20, 2011
Messages
8
Re: 1990 Merc 90 rebore cracked oil lines

It was the line between the oil and fuel pump that was snapped and unaligned then when looking at the other clear lines they came away in my hand, i will be cleaning and rebuilding the carbs during the rebuild so hopfully all will be good.
 
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