F-20 Question

Posted by Ron in Nebr on June 27, 2005 at 23:13:18 from (65.172.143.227):

Well, after it had seemingly become a permanant fixture in our shop for the last three years, I finally buckled down and finished the valve job on my F-20 last week.

After adjusting the points in the mag it fired right up, ran smooth for a bit, then died. Got dark out and I didn't have any more time to mess with it and haven't had time since....finally quit raining here so it's time to make hay.

I know I could probably figure this out by myself in time, but just thought I'd post here and see if anyone(Cowman?) could steer me in the right direction.

What the deal is- it'll start and run for a second then sputter and want to die. I found I could keep it running by pulling the choke almost completely shut. Then I open the choke and it'll smooth out for a second then almost die again until I pull the choke shut again. Obviously it's not getting fuel. Has a good stream of fuel from the fuel line at the carb and the screen in the carb inlet is clean. I also drained the old gas and it has fresh fuel in the tank.

My thoughts-
1- a jet or passageway somewhere in the carb is plugged up(I have a new carb kit sitting here that I haven't installed yet and a 5 gal. bucket of carb cleaner so if that's the problem it'll get fixed when I get time).
Or, 2- The intake manifold gasket isn't sealing and it's letting enough air in that it needs the extra fuel from choking it to run. I put the gasket on dry out of the box(knowing that most gasket sealers and fuel don't get along well together). Haven't yet tried spraying carb cleaner around the gasket to determine if it's leaking but that's next on the list.

Is there anything else I may be overlooking here? Any special tricks to sealing up the manifold gaskets on these engines? This is the original dual-fuel manifold, not an aftermarket peice.

Any advice will be appreciated! Alsp- if anyone knows a baseline setting for the fuel mixture screws on the carb, that'd be appreciated greatly too!

Follow Ups:

• Re: F-20 Question Ron in Nebr 19:54:26 06/28/05 (0)
• Re: F-20 Question Ron in Nebr 19:54:27 06/28/05 (0)
• Re: F-20 Question F-Dean 14:06:34 06/28/05 (0)
• Re: F-20 Question Bobcat 05:43:05 06/28/05 (0)
• Re: F-20 Question Nebraska Cowman 05:05:09 06/28/05 (0)
• Re: F-20 Question Sloroll 00:25:04 06/28/05 (1)
  • Re: F-20 Question Dave Brennan 05:24:02 06/29/05 (0)

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