I do that with my mercrusers, never any trouble. Have you done it to a 1973 Volvo, with a Chris craft engine? I hope the engine isn’t junk, ran for over an hour, seems to be fine.my Mercury’s have through hull exhaust . Of corse, this Lyman is through the outdrive. Mabey I should have said,Never hook the hose directly to the intake hose on your 1973 Volvo outdrive, with a 307 Chris craft , because it may have to much pressure and get into the engine through the exhaust valves.

I’m trying to figure out my valve stem seals.removed spring, no seal. Just the O ring below the keeper.anyone have an idea why no seal? And can I use an umbrella type seal ? Any info would be greatly appreciated! SC

The engine is a 1973 Chevy 307, modified by Chris craft, reverse rotation, mounted backwards. Fly wheel faces the cockpit.

I’ve never done much head work, so I don’t know anything about valve seals,,,,, anyone?

Thinking about the umbrella seals?

Thanks Bondo, we are going to try umbrella seals. Did another compression test all between 160-170. Much better then 65-120 befor. And now, another part of the story. One wet evening I was running the engine before I put water to it. Lost spark, and couldn’t figure out what happened. So I figured Mabey the coil went out. The only other coil I had was an msd blaster. Got it all hooked up, hit the starter button and,KABOOM! Wow that sparked em all at once! Blew the flap off the outdrive 40’ into the drive way. Even after that, still seems to run good. Back soon I hope, with more interesting story’s. SC