Poor compression on my kicker

[merc20076]

I've checked the compression on my small Evinrude 4,5 HP Kicker and I read only 70-75 PSI per cylinders after 3-4 cranks. It is really low. Used to have a 2HP and it had 120 PSI in the cylinder.

Even my good old Lark VIII 40HP '66 has 110 on both cylinders and runs A1.

I have a felling this is why it smokes blue a lot, I've cleaned the carb, engine with an engine cleaner, ajusted the low needle valve and nothing changed even after a good 4-5 hrs after the tune-up. Also the spark plugs are full of carbon deposits.

What should I do? Do more or change it after this season?

 

[Rick.]

Re: Poor compression on my kicker

Try a good treatment of seafoam to decrb. it. Other than that you could use a full synthetic oil as it is supposed to smoke less. If it runs O.K. I wouldn't worry too much about the numbers as they are at least even. Best of luck. Rick.

 

[Daviet]

Re: Poor compression on my kicker

As long as it meets your needs, keep using it. Maybe do a real good decarb.

 

[JB]

Re: Poor compression on my kicker

70-75psi is fine for a little pull start outboard, as long as the cylinders match within 10%.

It ain't broke, so don't fix it.

 

[kenmyfam]

Re: Poor compression on my kicker

I'm with JB. Should be no issue as long as it runs O.K. for you.