Home › Forum › Ask A Member › Johnson HD-25 "outboard or anchor?" › Re: Johnson HD-25 "outboard or anchor?"
April 3, 2017 at 12:50 pm
#55439
quote Steve A W:
Before you tear into those motors to replace the rings, run a healthy dose
of something like Sea Foam through the gas.
It will clean the old carbon from the rings and the compression might come up.
Google De Carbing outboard motor.
Back in the days your motors were running oil was dirtier than now.
I have a Johnson CD12 that had comp. numbers in the low 60’s when I unstuck it.
I ran a rich dose of Sea Foam through it and have run S/F in the gas since and
now the comp. is in the mid 80’s.
Good luck with your motors.
of something like Sea Foam through the gas.
It will clean the old carbon from the rings and the compression might come up.
Google De Carbing outboard motor.
Back in the days your motors were running oil was dirtier than now.
I have a Johnson CD12 that had comp. numbers in the low 60’s when I unstuck it.
I ran a rich dose of Sea Foam through it and have run S/F in the gas since and
now the comp. is in the mid 80’s.
Good luck with your motors.
Steve A W
I have been running that stuff since the 1970’s when I purchased it in Duluth. There was none of it in Canada at that time. Your motors will drip all the time at the bottom; but you will never ever get carbon build up. I normally "assume" all guys working on these engines at least pull the heads and LOOK? I run a 1/2 ounce per gal of gas