gt1800 Briggs 18 Hp ????

[Brockport Bill 1,933]

Can someone advise what the "healthy " compression reading range would be for the Briggs 18 hp in a '84 GT1800? I  would like to take compression reading for prospective purchase of GT 1800 .....but also need to know if it has a compression release valve? Any other insights, or advice, or info, about that engine is appreciated? What to look for, etc???           thanks !!!!!!!!

Edited April 26, 2022 by Brockport Bill
misc

[Bill D 2,247]

Some of those engines have been known to loose valve seats, like the Onan 20.  Compression check should show that.

[c-series don 10,023]

I too would like to know this. My GT-1800 has god knows how many hours on it so for the heck of it I’d like to do a compression check and see how it’s doing compared to the specs. 

[Brockport Bill 1,933]

1 hour ago, c-series don said:

I too would like to know this. My GT-1800 has god knows how many hours on it so for the heck of it I’d like to do a compression check and see how it’s doing compared to the specs. 

what is the source document that shows the spec for the 18 hp Briggs engine compression?

[dmoore 962]

Your more than likely going to overhaul it anyway, no?

[RED-Z06 2,567]

Briggs really doesnt give a compression spec..their compression release means that a good engine will show low compression, they generally say...key off, turn the flywheel backwards by hand...if it bounces off the compression sharply, its adequate.