What now?

jsboo72

Seaman Apprentice
Joined
Mar 8, 2009
Messages
39
First off, I'm an Etec noob. I'm somewhat familiar with other outboards and have rebuilt quite a few with great success but the E-tecs are foreign to me. Anyway, I just picked up a 2012 130hp Etec edplina from a gentleman for what I thought was a really good deal ($1600) as it is in really good condition besides the following. The PO said he had purchased it from another guy several months back and was told it had 300 hrs on it. The guy i got it from had it installed on his boat and eventually discovered the computer actually read 900 or so hours and 20+ over heats. In any case, When I got it he said "it has low compression" and that was all I was told. It didn't come with a control box but i bought one with a harness and plugged it up. I bumped the key with no fuel/oil connected for a very brief sec and it fired right up. Next, I pulled the plugs and did a compression test. It wasn't a warm compression test with the throttle wide open (no cables and only two hands) but I got:
Strbd top-95 psi
Strbd bottom-100
Port top 120
Port bottom 125

Where should I go from here? Is there something that could cause a low compression reading on these outboards that doesn't require a breakdown and rebuild? I just want to make sure I've eliminated all possible causes before I tear into it. Please forgive me for my ignorance.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,930
Is there something that could cause a low compression reading on these outboards that doesn't require a breakdown and rebuild?
Sorry but no as they have very little carbon build up in the ring lands, the excess overheat are likely from the strbd side and that's why compression is low as the pistons when overheated tend to drop locating pins. Pull the head and inspect as it has o-ring for gaskets.
 

jsboo72

Seaman Apprentice
Joined
Mar 8, 2009
Messages
39
Could it possibly be the head gasket or o-rings that's causing the low compression? I'll check them soon as i'm not near the motor for the next few days. What would cause an overheat besides a bad impeller? Would overheating possibly damage the "EMM" or whatever the computer is called? Would bad fuel injectors be a cause? Will a history report reveal problems with injectors for instance. Sorry for all the questions.
/
 
Top