can I do a compression check without a carb on the motor?

[storedaddy]

this might be a silly question. I am looking at buying a parts motor 9.9 johnson that does not have a carb. and I want to know if the powerhead rings and pistons etc are in good shape still.
thanks.

 

[trendsetter240]

Re: can I do a compression check without a carb on the motor?

Yes, engine should still have compression with the carbs off. Compression exists as long as the reed valves are closed.

 

[G DANE]

Re: can I do a compression check without a carb on the motor?

And even with the reed valves off, compression will be next to the same, I had one with a broken leaf once, on one cylinder, still had same compression never the less.

 

[reeldutch]

Re: can I do a compression check without a carb on the motor?

reeds build up crankcase compression and vacuum always overlooked on a 2 stroke.

its a way to transport intake to the cylinder.

on a compresion test it doesnt matter its just air.