What could have happened here? Hole in bypass cover (pic)

[motodave]

83 gt150 J150STLCTE I didn't see this until a few days after removing starter. Looks like it was patched before, but I cant for the life of me figure out what would have happened. Does anyone know if I order a new cover if it will come with the nipple for recir hoses? Or do I have to press the old one out? The surprises just keep coming on this motor

 

[boobie]

How's the motor run ??

 

[motodave]

Hi boobie, so far it doesn't like to idle, but runs well when on plane. No rough spots after fuel system & carb rebuild Pretty rough idle. I've got new recir valves on the way, thanks for looking, one good thing is I guess is it's only $20. Any damage done you think?

 

[Bosunsmate]

Do a compression test and then you will know if its being running lean too long, its smallish hole though

 

[boobie]

You'll be able to tell more after the compression test.

 

[emdsapmgr]

A couple of possibilities: 1. The first choke solenoid applications on the crossflow engines did not inject fuel into the top of the 3 carbs-like on your 1983. The 80 thru 82 fuel primer hoses ran down the side of the engine to a brass hose barb-on each bypass cover. Possible that you have a 1980-82 bypass cover on your engine, and that the small brass nipple is missing. 2. later crossflow engines came equipped with factory recirculation systems. This plumbed a hose between the back of the reed box area on the intake-to a brass nipple on each bypass cover. This hole exposes that cyl to the normal atmosphere, degrading the compression/suction performance of that cyl. If this is what is going on, you need to plug the hole or just replace the cover with the correct one for your year.

 

[motodave]

Thanks all you guys for looking, going to replace it and have a look in there, see if theres any gremlins then start over with compression test. Thanks again!