Hi
I have noticed, that my '87 6HP Mercury Outboard has a decompression-port for each cylinder, that opens much more earlier that the normal Exhaus-port and therefore closes much later when die piston is on its way up to the TDC.
That way i loose compression and fresh fuel, that comes out of the upper exhaust in the shaft and runs down on it.
I am now wondering, why Mercury did something like this and suspect that easier starting was the main reason behind this.
Which brings me to my other question: I consider myself strong enough to crank the engine even if it isn't decompressed and would like to prevent fresh fuel to leave the cylinder through these ports. How could i achieve this? Is there any High-Temp. Epoxy available that could be used to close these ports?
I have noticed, that my '87 6HP Mercury Outboard has a decompression-port for each cylinder, that opens much more earlier that the normal Exhaus-port and therefore closes much later when die piston is on its way up to the TDC.
That way i loose compression and fresh fuel, that comes out of the upper exhaust in the shaft and runs down on it.
I am now wondering, why Mercury did something like this and suspect that easier starting was the main reason behind this.
Which brings me to my other question: I consider myself strong enough to crank the engine even if it isn't decompressed and would like to prevent fresh fuel to leave the cylinder through these ports. How could i achieve this? Is there any High-Temp. Epoxy available that could be used to close these ports?
