Mariner 115 inline 6 - Rebuild starting problem

A

awehnert4

Cadet
Joined
Jul 5, 2012
Messages
10
I've just finished rebuilding my '88 Mariner 115 Inline 6 motor and have a technical quesion I'm hoping to get answered.
After getting everything back together, I found that cranking was tight, like I had 20-1 compression. Had a hard time turning over. So I took the plugs out and found the motor cranks just fine. Any thoughts would be appreciated, hopefullya good one from a mechanic.

Thanks
 
canoemang

canoemang

Petty Officer 1st Class
Joined
Apr 9, 2011
Messages
350
Re: Mariner 115 inline 6 - Rebuild starting problem

If you honed/new rings the initial turn over is a bit stiffer until it get broke in, metal on metal and what not.

If you did use new rings etc.. did you coat the cylinder wall with 2 stroke prior to assembly?

If not it is dry metal to metal..

By no means am i a "Mechanic", but i just rebuilt a 86 merc 115 and it was stiff as heck prior to break in.
 
C

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,158
Re: Mariner 115 inline 6 - Rebuild starting problem

Check starter cables and battery cables and ground cables for clean connections. Maybe starter is not getting full current? With the plugs out they should turn over using finger pressure on the flywheel.
 
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