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rough idle

Posted: Sat May 28, 2011 1:40 pm
by paul42mill
Hi.
Just wondered if anyone has encountered this one.
Have just got my moggie up and running after a long slumber, starting and running o.k. just seems a little lumpy on tick over.
will idle with the revs turned up a little but not on low revs.
Have cleaned the carb out, fitted new plugs, points. condenser and checked that fuel is getting through o.k.
The only other two things left for me to try is to replace plug leads and drain the old fuel.
I did add a coulpe of gallons of fresh stuff to the old but did not drain it.
Fuel may be stale so will drain tank and put fresh in.
Any other ideas??

Paul.M.

Re: rough idle

Posted: Sat May 28, 2011 3:48 pm
by minor65
Check tappet clearance gap and then carry out a compression check if no improvement.

Re: rough idle

Posted: Sat May 28, 2011 4:57 pm
by Dean
Have you checked the dash pot has oil in it?

Re: rough idle

Posted: Sat May 28, 2011 5:01 pm
by paul42mill
Hi.
Good point, how much oil should you put in the dash pot and what type, is it the 3 in 1 type ??
Paul.M.

Re: rough idle

Posted: Sat May 28, 2011 5:48 pm
by bmcecosse
3 in 1 - just burn off the old fuel, don't bother draining it.

Re: rough idle

Posted: Sat May 28, 2011 5:53 pm
by Dean
Paul, enough to create resistance as you press the plunger back down. Don't overfill as you will spend several minutes slowly pushing the thing back down.

Re: rough idle

Posted: Sat May 28, 2011 6:00 pm
by paul42mill
Hi.
Thanks very much, will let you know how i get on.

paul.M.

p.s. its a god send this website.

Re: rough idle

Posted: Sun May 29, 2011 9:18 am
by mike.perry
Have you tried adjusting the mixture?

Re: rough idle

Posted: Sun May 29, 2011 10:46 am
by Dean
Have you had a quiet word with her?