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Author Topic:   I smell a Rat!
BJ posted 06-29-2002 09:17 PM ET (US)   Profile for BJ   Send Email to BJ  
1988 150 Merc 0n 18' OR

Just fired up the engine before heading down to the ramp. First time out this year and eveything was looking great except for the puddle of oil rapidly growing in the CC. I soon discovered a hole in my oil line just before it enters the bilge from the console. Looks like the work of a rat...chewed through only one of the lines.

The way I see it, there are two options:

1. Cut out the defect and insert a sleve. The oil line is only 1/4"??? Will a sleve impede the oil flow too much?

2. Forget about boating this weekend and next while waiting for a replacement hose from my dealer.

I believe popular opinion will be to suck it up and wait. Any thoughts???

Regards, BJ

WHALETEX posted 06-29-2002 09:49 PM ET (US)     Profile for WHALETEX    
I had the same problem except it was the speedo pitot tube. Found when I noticed the tunnel filling with water while underway. Pulling the tube from the pitot solved my problem...I thought. Turns out the little SOB had spent some of his spare time redecorating other things in the tunnel, like a number of bare spots on the switch wire for the lights and a few small nicks in the fuel line (not all the way through). Could have been a disaster with the bare wire, water, and fuel. When I removed the stuff I knew was bad I found damage along the full length of the wiring, pitot tube, and fuel tube. So I changed pitot line, fuel line, oil line, and wires. I highly recommend at the very least a thorough inspection with a mirror and flashlight. If any other damage is found where you can see it, I recommend pulling anything that is unshielded out of the tunnel for inspection/replacement. The wiring harness for my outboard was shielded in a thich shrink type tube and was undamaged when I pulled it. If no other damage exists a splice to insert in the inside if your oil line should work fine as a temp fix as long as it is absolutly air tight. The fix must be airtight or the oil pump will draw air not oil.
BJ posted 07-01-2002 01:48 AM ET (US)     Profile for BJ  Send Email to BJ     
Thanks for the advice. Did lots of investigating with a flash light and mirror today. The little buggars chewed through the outbound gas line as well. I'm going to pull the electrical through the tunnel tomorrow. You made an excellent point: fuel/water/bare wires = BIG PROBLEM!

Regards, BJ

whalerron posted 07-01-2002 08:58 AM ET (US)     Profile for whalerron  Send Email to whalerron     
My Johnson manual warns against adding any other fittings in the oil line. This is because each extra fitting impedes oil flow by adding a bit more resistance. You should definitely replace the oil line.
BJ posted 07-01-2002 03:49 PM ET (US)     Profile for BJ  Send Email to BJ     
Pulled all other electriacal through the tunnel. Primary Negative lead to the engine had a 8" bare section nawed to the bone.

The small diameter wire attached to the psi gauge, how does it work? Is there electrical current running through it?

Regards, BJ

Bigshot posted 07-01-2002 03:53 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
probably a ground.

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