Cruising at 3000 rpm, I had a loss of power and the engine stopped as if overheated or out of fuel. (Fuel supply is not the culprit here as I had earlier replaced the mechanical fuel pump with an electric pump which was satisfactorily delivering fuel to the engine.)
Overheating seemed to be the indications as exhaust smoke emanated from the exhaust cover, a brief sizzling sound was heard and the water pump telltale indicator showed water being pumped thru the engine each time I turned the engine over trying to restart.
Long story short, towed to the landing, now into the manuals, and the 1st order of things was to check cylinder compression. all cylinders tested at 60 psi, which looks to be below accepted standards. So I removed the carbs and intake manifold to check the leaf valves. The valves appearance was clean, no apparent damage, all leafs fitting tight.(I have not disassembled the leaf valve assembly yet.)
With no obvious damage to the valves, I decided to do another compression test on the cylinders. The results were 25 psi on all cylinders, some what lower than the previous test before dis-assembly of the intake manifold.
The compression test are really what is confusing me, and so I have stopped and started looking for some agreement whether I should disassemble the engine as the manuals instruct (or) have I went to far in trying to overcome what may be a much simpler carburetion problem or maybe a blown gasket.
Overheating seemed to be the indications as exhaust smoke emanated from the exhaust cover, a brief sizzling sound was heard and the water pump telltale indicator showed water being pumped thru the engine each time I turned the engine over trying to restart.
Long story short, towed to the landing, now into the manuals, and the 1st order of things was to check cylinder compression. all cylinders tested at 60 psi, which looks to be below accepted standards. So I removed the carbs and intake manifold to check the leaf valves. The valves appearance was clean, no apparent damage, all leafs fitting tight.(I have not disassembled the leaf valve assembly yet.)
With no obvious damage to the valves, I decided to do another compression test on the cylinders. The results were 25 psi on all cylinders, some what lower than the previous test before dis-assembly of the intake manifold.
The compression test are really what is confusing me, and so I have stopped and started looking for some agreement whether I should disassemble the engine as the manuals instruct (or) have I went to far in trying to overcome what may be a much simpler carburetion problem or maybe a blown gasket.
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