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Hot start blues

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King
Posts: 387
Joined: Fri Apr 02, 2004 5:05 pm

Hot start blues

#1

Post by King » Tue Sep 12, 2006 3:36 am

I'm baffled.
My 51FL has STD heads, Bendix carb, Andrews #1 Cam, solid pushrods, and electronic ignition. The engine was rebuilt this winter with a new top end and all new bearings in the bottom. It runs great, plenty of power and torque.
It cold starts quite well and when hot if you shut it down for a short time, say to fill with gas, it restarts first kick. But shut it down and let it sit for 5 or 10 minutes and it won't start till it cools down for at least a half hour. It will occasionally backfire through the carb but that's it.
Can anyone hazard a guess as to reasons and possible cures?

All help appreciated.

King



Gearbox
Posts: 38
Joined: Sat Jul 14, 2007 3:08 pm

Re: Hot start blues

#2

Post by Gearbox » Tue Sep 12, 2006 5:55 am

King
If I sit for more that a couple of min. , I give her one prime kick full choke with ign. off and then 1/4 choke with ign. on to start, it seems to work just about every time .

VPH-D
Posts: 851
Joined: Tue Feb 01, 2005 1:00 am

Re: Hot start blues

#3

Post by VPH-D » Tue Sep 12, 2006 6:15 am

Is the gas in the carb boiling? I have a Shovel that used to pull this trick.
VPH-D

kell
Posts: 404
Joined: Sat Jun 19, 2004 2:58 am

Re: Hot start blues

#4

Post by kell » Tue Sep 12, 2006 4:48 pm

I don't know whether you carb uses a choke plate or richener, and I don't know your hot starting procedure. But,
If I had your problem, I'd disable the accelerator pump so I could try cracking the throttle when it's hot/warm.

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