Re: mark 75 issues

[motoscott909]

HI guys,

Thanks for all the input. Its been so darn hot here i haven’t wanted to get out in the barn to work on the Mark 75. last night it cooled off to about 85 degrees so i went out to see what i could find. I took the bottom fuel pump apart and all seemed fine. On the top fuel pump i noticed an ever so slight tear in the gasket (probably a manufacturing flaw) but the diaphragm was 100% fine. Im going to replace the gasket to be safe, but my guess is that this is not my problem.

I didn’t get a change to look into the fuel tank, but i will try to do that tonight if it stays below 90 degrees. One other thing that i have noticed since i replaced the primer bulb and line,which i didn’t mention before, is that when i squeeze the primer bulb it stays collapsed for a few seconds before it lets you give it another pump. With my old OEM merc bulb it never did this. As fast as i could pump, the bulb would allow it. The new bulb is an aftermarket ATWOOD brand (all my local marina had). Has anyone else experienced anything like that? Thinking about getting a good OEM Merc bulb again.