"I have a pr of old 1973 carb
"I have a pr of old 1973 carb Mercuiser 5lt inboards. The port motor has developed a tapping sound that sounds like loose tappets. They are not loose, replaced all the hyd. lifers, no difference. With the rocker cover off the sound is not from there. Using a...
I have twin 302 Mercruiser Win
I have twin 302 Mercruiser Winsor Fords 1973 vintage. One has developed a tapping noise at the top end that sounds like lifters. It's continuous. I'm not sure how to set the rocker lifter nuts. I thought they should all be tight but all these seem to be about a...