Jet star 3 Super

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Jet star 3 Super

Postby Northman69 » Sat Sep 12, 2020 8:10 pm

Just bought a MM for use around the farm, previously had a 2N Ford.
- I have a low producing cylinder, #2 to be exact. low compression (35psi), plug is fouled, the other cylinders are @ 120 psi range(+ or - 5psi.) tested with all plugs removed. added oil to the cylinder and increased to 40psi.
brought cyl 2 at TDC and connected air to cylinder. bubbling at the intake.

Are there issues with burned valves on these or might it just be carbon hanging the valve? How are the valves looking when any of you have pulled valves? For the sake of being thorough I think I'll try the old spraying water in the intake trick after I get it up to operating temperature tomorrow.
I'm gonna remain hopeful but expecting I'll be pulling a head soon.
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Joined: Sat Sep 12, 2020 5:47 pm

Re: Jet star 3 Super

Postby MMDEL » Sat Nov 28, 2020 11:20 am

I see nobody ever replied to your post. Sorry for that. Did you get your problem solved? Normally valves aren't a problem on that engine. maybe the tappet was too tight.
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Joined: Thu Jan 11, 2007 12:47 pm
Location: Franklin Grove, Ill.

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