1980's mariner 20 hp, I got the boat out I storage last weekend put muffs on and it started right up on the 3rd pull. Let it run for 5-10inutes and shut it down think I was all set to fish. Got the boat in the water started on the first pull ran for about a minute then stalled out. Started back and ran for 30 seconds or so then stalled out. Now it won't start at all. I replaced plugs and have sparks on both, checked all fuel line for blockage and has all fresh gas. The only thing doesn't seem right is that when I pull the choral out there used to be a slurping sound that doesn't happen anymore. Any ideas on what it might be.
Also what is the going rate for it to be checked out at a marina?
Also what is the going rate for it to be checked out at a marina?