1985 johnson 115 compression

R

retirfire

Recruit
Joined
Mar 11, 2008
Messages
2
I have a 1985 Johnson 115. Took it out on a Sat. and it did great. The next Sat. we took it out again. This time it did not have the power as normal. Got home and checked. Very little compression on top right (looking at motor from the rear) cylinder. Does not make any odd sounds.
 
HighTrim

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: 1985 johnson 115 compression

Welcome to iboats.

What were the readings?
 
R

retirfire

Recruit
Joined
Mar 11, 2008
Messages
2
Re: 1985 johnson 115 compression

Don't have them yet, did not have compression gauge. Friend is going to bring one to the fire station next time he works. We will check it then.
 
HighTrim

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: 1985 johnson 115 compression

Let us know what you find.

Check the compression and spark.

The compression should be around 100 psi (depending on gauge, temp, etc) and within 10 percent between cylinders.

With all plugs removed, leads grounded, the spark should jump 7/16 of an inch with a bright blue ZAP!!

If compression and spark check out, you will need to look into fuel delivery.
 
You must log in or register to reply here.
Top