Re: 5.7 thru hull exhaust
ok here's what led me to believe thru-hull would fix my problem without having to replace the flappers. At the end of the season before last my thermostat got jacked and my engine got pretty hot, around 250 or something I think but I noticed it right away and shut it down and ripped out the thermostat. Then this past season I noticed that when I'm hooked to a hose and rev it a little bit everything is fine, even after turning it off and stuff. But whenever I'm in the water, even after I throttle down way slow and let the engine idle for a little bit then shut it off, when I start it back up it starts fine, and it acts normal until like 2000 rpm, once it hits that it'll bog like a turd. So needless to say it won't plane until I put it in neutral and just rev the engine repeatedly until it gets past the bog point. Usually takes about a minute or so. So when I found a burnt piece of rounded metal covered in rubber coming out of my exhaust hole with the drive up presumably from when the motor got hot the season before, I figured it's a reasonable conclusion that a bit of water is getting into the wrong place when I'm sitting in the water without the pressure from the exhaust pushing it out, since the flapper was in my hand....I talked to a local mechanic who works on omc 800 drives all the time and he said to replace the flappers is like 50 bucks per flapper and 500 labor. I was considering doing a thru-hull system anyway and just capping the y-pipe should prevent water from getting in. That way I could have thru hull and fix the water seeping problem with the flappers on the transom for the above waterline exhaust for like 100 bucks. Better than 600 and more beneficial in my book anyway.
