Reply To: 7-1/2 Merc75 Idle Problem

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August 18, 2020 at 9:25 am #211972
David Stanton
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    Thanks guys for the suggestions. It just came back to my memory that when I changed the spark plugs, one plug had rust around the edge of the inside surface. This got me to thinking maybe there is a blown head gasket letting a bit of water in, so today, first thing I’m going to check is compression. Next will be for 3/8 inch spark. When I changed plugs, I looked for spark in the surface gap with the plugs removed and it looked healthy, but that’s a short jump with no compression. Stay Tuned…..
    Dave