The compression on a 1980 Evinrude 150 should typically be in the range of 90 to 120 psi for each cylinder. It's important that the readings are relatively consistent across all cylinders, with no more than 10% variation between them. If the compression is significantly lower, it may indicate issues such as worn rings or a blown head gasket. Regular maintenance and checks can help ensure optimal performance.
A 1994 model, Evinrude 150 Ocean Pro, weighs 375 lbs. ( Dry weight ).
Should be around 150 psi.
150 psi
60 mph on a good bassboat.
The 1990 model, 150 hp Evinrude outboard has a listed dry weight of 365 - 393 lbs, depending on the particular model.
A yamaha blaster should have at least 120psi 150 is recommended
Around 150 to 200
The 1992 model, 150 Evinrude SF has a dry weight of 372 lbs.
I should be equal on all cylenders and about 110 to 120
120-150 psi as per Haynes manual.
You should look for consistancy in compression readings rather than individual numbers-- all cylinders should be within 10% of each other i.e. 150 ok with 135-165
50:1