cylinder #4 clean as a whistle

[fisheymikey]

I have a force 125 1988 on trophy 18.5

I have 140lbs on all cylinders

here is the problem, all 3 cylinders above are relatively dirty and the bottom one is very clean.
im assuming its due to the engine swap I made in the beginning they have used a silicone gasket.

also when I remove spark plug wir on any other cylinder I see a change to the engine except cylinder #4.

what do u think?

mike

 

[Frank Acampora]

Re: cylinder #4 clean as a whistle

Check for a leaking exhaust cover gasket or a leaking head gasket. Water will stem clean the sparkplug and also cause misfiring.

 

[jerryjerry05]

Re: cylinder #4 clean as a whistle

You have spark on all 4?
If not try swapping the coil leads.
Then the leads from the pack?

 

[fisheymikey]

Re: cylinder #4 clean as a whistle

yes I do have spark on #4

is there any way of checking the gaskets without removing the whole engine apart?

head gasket looks pretty simple the exhaust gasket seems I have to separate engine block from bottom part of unit

mike

 

[fisheymikey]

Re: cylinder #4 clean as a whistle

I also cant buy piece by piece I need to buy the whole gasket set for a whopping 200 bucks

where could I buy it piece buy piece im from quebec Canada

mike

 

[pnwboat]

Re: cylinder #4 clean as a whistle

Try these folks. May want to contact any of the sites below first to see if they ship to Canada. Most likely they do, but should check first.

Mercury, Mercruiser, Force, etc. - POWER HEAD - FORCE 1988 125 HP "C" MODELS

Or these folks.

Chrysler or Force Head Gaskets

 

[jerryjerry05]

Re: cylinder #4 clean as a whistle

boats . net I hate them but they ship to Can.