Hi all.
I am a third-season owner of a Pearson 28-1 with original A4 engine from early 1970's.
This season a noticed a sudden drop in power - cannot get above 4 MPH under load, no acceleration and struggling in any waves or head winds.
Compression test (dry) as follows: 100, 50, 75, 100. I do not have information on any previous compression readings prior to my ownership.
I have added MMO to the gas to try to clear stuck valves.
Drained the carb and fuel filter (which is changed every season).
Oil pressure and temp is all good.
Idles well and throttle responds well in neutral. But no power beyond an easy 4 MPH in gear.
Any suggestions other than valve job or possible head gasket replacement (noting cylinder 3 and 4)?
I am a newbie at all this.
Thanks.
I am a third-season owner of a Pearson 28-1 with original A4 engine from early 1970's.
This season a noticed a sudden drop in power - cannot get above 4 MPH under load, no acceleration and struggling in any waves or head winds.
Compression test (dry) as follows: 100, 50, 75, 100. I do not have information on any previous compression readings prior to my ownership.
I have added MMO to the gas to try to clear stuck valves.
Drained the carb and fuel filter (which is changed every season).
Oil pressure and temp is all good.
Idles well and throttle responds well in neutral. But no power beyond an easy 4 MPH in gear.
Any suggestions other than valve job or possible head gasket replacement (noting cylinder 3 and 4)?
I am a newbie at all this.
Thanks.
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