200hp Johnson with 1 cyl compression a little low

[Deasteregg]

" I have a 95 Johnson 200hp. W

" I have a 95 Johnson 200hp. When checking the compression I found 2 cylinders at 115, 2 more at 110, 1 at 105, and the last one at about 98. Is this OK or should I be worried? If not, at what point should I start to look at a rebuild? "

 

[tommyg]

" Hi Deasteregg...A good rule-

" Hi Deasteregg...A good rule-of thumb is the lowest should be within 10-12% of the highest...may idle a little rough, but should run fine...If and when it drops a cylinder due to low compression, then its time to get the check book out..! TommtG "

 

[willard]

do a decarb and see if that w

do a decarb and see if that will help

 

[deasteregg]

What is a decarb?

What is a decarb?

 

[sparky]

Decarb is a procedure done by

Decarb is a procedure done by many people to try and get a motor to run correctly(mechanic in a can).The idea is to free up sticky piston rings.

 

[deasteregg]

Thank all of you for your tim

Thank all of you for your time. I will try this idea.