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For a 150 HP outboard motor, ideal compression readings typically range between 100 and 130 psi per cylinder, but this can vary based on the specific engine model and manufacturer specifications. It's important that all cylinders show similar compression values, with no more than a 10% variance among them for optimal performance. If compression is significantly lower than the recommended range, it may indicate engine wear or other mechanical issues that need addressing. Always refer to the manufacturer's service manual for precise specifications.
What else can I help you with?
What should the compression be at on a 150 hp mercury outboard motor?
I should be equal on all cylenders and about 110 to 120
What should the compression be for a 50 hp 4 stroke Mercury outboard motor?
125 is the least
What should the normal compression be on a 1997 Johnson 15 hp outboard motor?
between 90-120
What is the engine compression specification for a 1989 Evinrude 110 hp VRO outboard motor?
110
How old is a Mercury 150 hp outboard with the serial number 5976483?
A 150 hp Mercury, serial number 5976483, is a 1982 year model.
What is the gas oil mix for a 150 hp force motor?
The 150 hp Force outboard requires a 50:1 fuel to oil ratio.
How much does a 1997 2 stroke mercury 150 hp weigh vs a 1995 135 hp mercury outboard motor?
The 1997 Mercury 150 HP 2-stroke outboard motor typically weighs around 460 pounds. In comparison, the 1995 Mercury 135 HP 2-stroke outboard motor weighs approximately 400 pounds. Thus, the 150 HP model is about 60 pounds heavier than the 135 HP version.
What is the cylinder compression for a 2003 90 hp mercury outboard?
I have a 2005 and compression should be close to 120 psi. Normally a good engine will have compression between 115 and 130 psi but a leak down test should be performed also to know the full condition of a cylinder.
What is the weight of a 1991 Johnson Outboard 150 hp?
The dry weight of the 1991 model, Johnson 150hp outboard is 384 lbs.
What is the fuel mix for 1984 evinrude 150 hp outboard motor?
50:1
What is the compression for a 1974 Johnson 65 hp outboard?
In the early 1970's, when you could still get good gasoline, outboard compression in the 180-190 psi range was common. If your 65 hp Johnson is running in the 100-150 psi range, this would be acceptable, and the engine should still perform well on todays fuel. The important thing to note with compression readings however, is that the difference between the highest and lowest reading, is no more than 15 psi. One more note, avoid fuels containing alcohol if at all possible.l
What size of Cranking Marine Battery do you need for your 150 HP outboard motor?
100 aph
