1997 johnson 3 cyl

[juststartingout]

my son took the boat out today first time this spring,said it ran well for 15 minutes. then started missing got it back home no comp on #2 cyl what should I loo for
. Never took apart a outboard before. any help thanks ron

 

[flyingscott]

Kind of a common issue with them if you are sure the compression is 0 time to pull the head

 

[tblshur]

juststartingout , if you shure of comp , my guess is you will have to pull head and have a look hopefully just a head gasket. it just a guess so wait for someone with more knowledge than me to chime in, good luck :joyous:

 

[juststartingout]

yes sure of comp 0 other 2 cyl good thanks for advise ron

 

[emdsapmgr]

A faulty seal ring on the #2 hole in the head gasket would make an easy and cheap fix. If it's more that than, you are looking at a powerhead teardown and at least a partial overhaul. At this point, you need to be working from a genuine factory service manual. Check out this website: outboardbooks.com

 

[juststartingout]

thanks I will get to it next week with some luck

 

[boobie]

As said above, pull the head and get back to us.

 

[juststartingout]

ok thanks

 

[juststartingout]

pulled the head today no problem with the gasket

 

[boobie]

Can you post a pic of the gasket and the cylinder ??

 

[juststartingout]

I will have to go back to where the boat is now.get pics the gasket look good no score on the wall I am a mechanic by trade but never worked on 2 stroke

 

[juststartingout]

sorry forgot to say thanks

 

[Crosbyman]

I would check that head gasket real close..:cold: . I have replaced them on a JW and a couple 4hp

 

[juststartingout]

will do thanks

 

[Crosbyman]

well since you opened it up I would change the (cheap) head gasket* good or not...

check the head for flatness with a steel ruler or piece of glass looking sideways.

if you see light ...it is warped.. you need to resurface it


* get the good OMC stuff

 

[juststartingout]

that's my plans thanks

 

[flyingscott]

There are access covers on the side of the motor by the electrical panel you can remove those to see the side of the piston.

 

[juststartingout]

got omc gasket might be a week before I get out to work on it. thanks again ron

 

[racerone]

I do not believe there are any covers on the side of the block to look at the pistons and rings !

 

[flyingscott]

I do not believe there are any covers on the side of the block to look at the pistons and rings !

He is right sorry about that.