860 again

dwag · Jun 7, 2015

Posted last week on fuel problems on an 860. I blamed excess fuel tank press on engine heat and a new fuel cap. Got to thinking, (which is dangerous) is a fuel cap supposed to vent both ways or act as a check valve allowing air to come into tank to replace fuel volume used but not to vent tank, or hold a certain press in tank and release after press rises to certain level?

JMOR · Jun 7, 2015

(quoted from post at 20:10:16 06/07/15) Posted last week on fuel problems on an 860. I blamed excess fuel tank press on engine heat and a new fuel cap. Got to thinking, (which is dangerous) is a fuel cap supposed to vent both ways or act as a check valve allowing air to come into tank to replace fuel volume used but not to vent tank, or hold a certain press in tank and release after press rises to certain level?

top thinking. Free air flow in either direction.....like breathing.

NoNewParts · Jun 8, 2015

it's just a hole.
engineers just come up with fancy routing of the hole
to keep water out.
Good idea, but kinda pointless, if air can exchange so can water and/or water vapor.
I just drill a hole in em, or go to CNH and get one of those fancy
vented, anti-rollover thingy gas caps.
(they used to be free....don't know if they still are)

dwag · Jun 8, 2015

Thanks. Check for ex leak as you suggested in my earlier "660" post and found muffler split. john

(is my face red or what?) lol

860 again

dwag

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JMOR

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NoNewParts

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dwag

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