1990 mercury 2.4l compression

[Partonjoshua]

Just wanted to run these compression numbers by yall, one cylinder is a little lower than the others and wanted to make sure all is good. Compression was checked cold, all plugs removed, and butterflies closed. Motor is a 1990 merc 2.4l with a little over 5 hrs since rebuild.
#1 125
#2 126
#3 124
#4 125
#5 119
#6 123
number 5 had me a little worried, just wanted some piece of mind. Thanks

 

[Texasmark]

Manual on my 90 said anything below 120 expect problems. Both loopers, both 2 strokers. Big guns on here go more on commonality than absolute value since numerous variables in the measurement besides the actual compression of the engine. Looks like you passed.

 

[Dukedog]

those are really good "base" numbers for new 2.4 slot relief motor rebuild.. hot/cold, open/closed as long ya don't change tha process.. think if something was amiss it would be showin' by now....

you do tha rebuild or a shop?.

 

[Partonjoshua]

Ok good, thats what i wanted to hear, just wanted to record my base numbers so i have something to go by later down the road. I did not do the rebuild, got it from wilson outboards in jasper, ga. My last motor i rebuilt myself on a budget, replaced 2 pistons and re-ringed the rest, but only honed the cylinders instead of sending the block to a machine shop. Needless to say after puting the thing back together and running it for a while i was never able to get it to run right. After checking it, 5 of the cylinders were at 125lbs and one was at 60lbs, so just i sold it and bought this one. Wont make that mistake again when this ones due for a rebuild.
thanks guys

 

[QBhoy]

I’d say that’s strong as an ox for that engine.

 

[Partonjoshua]

Awesome thanks guys