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Ford 600
:

hard to start when warm

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Tom Fischer

04-07-2000 02:03:16




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Have a Ford 600. Starts fine when cold. Hard to re-start when warm. I'm going to adjust the valve tomorrow. (300 hours since I last adjusted them). Anything else I should be thinking about??

Thanks,

Tom Fischer




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Tom Fischer

04-08-2000 11:26:09




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 Re: Ford 600 - hard to start when warm in reply to Tom Fischer, 04-07-2000 02:03:16  
Well it turned out to be a georgeous day. So I warmed the 600 up real good, took off the tank and set all the valves. They were all real tight - maybe .005". That was the problem. Starts up fine when hot now.

Thanks for all the responses.


Tom Fischer



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Jim(UT)

04-08-2000 21:55:50




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 Re: Re: Ford 600 - hard to start when warm in reply to Tom Fischer, 04-08-2000 11:26:09  
I see your hood cover fits as good as mine 8^)



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Kim Hartshorn

04-08-2000 06:09:03




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 Re: Ford 600 - hard to start when warm in reply to Tom Fischer, 04-07-2000 02:03:16  
Could be your coil. When coils start to go they fail when they are hot. Also possibly the resistor if it is an external resistor. If the coil is old I would replace it anyway before the valve job, unless you wanted to do the valve job for other reasons anyway.



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Tom Fischer

04-08-2000 06:59:28




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 Re: Re: Ford 600 - hard to start when warm in reply to Kim Hartshorn, 04-08-2000 06:09:03  
Coil is 'pretty' new (maybe 500 hours). I imagine a coil costs a couple of bucks (and non-returnable). You might be right, but I think I'll try the valves first.

Thanks for the tip.



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Jerry

04-07-2000 18:46:41




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 Re: Ford 600 - hard to start when warm in reply to Tom Fischer, 04-07-2000 02:03:16  
Hello Tom
If you have tried all of the postings and still
have had no luck try this one.Get a piece of
aluminume(how ever you spell it)1/16" and put it
between your motor and starter.This will be a heat
sink taking heat away from your starter.
If that doesn't help then well have to go there
Have fun Tom---Jerry



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Tom Washburne

04-07-2000 07:57:21




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 Re: Ford 600 - hard to start when warm in reply to Tom Fischer, 04-07-2000 02:03:16  
FYI, I once had a similar problem with my Ford 860. I suspected starter (resistance goes up when they get old, and won't work well when hot), but it was OK. I eventually discovered that the starter relay (I think that is the name) was corroded and when it was hot could not handle enough current to turn the starter over. You should be able to find the relay easily by tracing the line back from the starter. You might want to check it out.

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Tom Fischer

04-07-2000 16:11:02




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 Re: Re: Ford 600 - hard to start when warm in reply to Tom Washburne, 04-07-2000 07:57:21  
Mine is not a starter problem - spins fine. Just spins (when warm) like it is out of gas - no sputter at all.

Engine is pretty clean, I never had any dieseling. Going to rain tomorrow. Not going to work on it. I'll be back in a week or two to report if valve clearance was the problem.

Thanks for all the help,

Tom Fischer



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ken in wisconsin

04-07-2000 08:46:51




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 Re: Re: Ford 600 - hard to start when warm in reply to Tom Washburne, 04-07-2000 07:57:21  
Tom,
Does it spin over easily enough, or does it seem to just barely turn over? A mechanic once told me that this sort of thing might be caused by carbon deposits. The theory is that the deposits are heated up by running the engine. When you shut down and try to restart the hot deposits will pre-ignite the fuel on the piston up-stroke, and actually work against the starter. The idea made some sense to me, until I thought that if this was the case, the engine would "diesel" when I shut it off. Next I realized that when I shut down, I throttle down to nothing, thereby starving the engine of fuel to "diesel" on. Another mechanic told me that the wiring, once hot, doesn't flow the juice as well as cold wires. Take your pick, or take neither. In any case, I have this problem with my 860, but it always starts; it just seems to hesitate in turning over when the engine is good and hot, sort of like the last gasp of a dying battery at 20 below in Wisconsin. I havn't actually pulled the head to look.

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Jim(UT)

04-07-2000 10:08:54




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 Re: Re: Re: Ford 600 - hard to start when warm in reply to ken in wisconsin, 04-07-2000 08:46:51  
My 850 is the same way. Starts fine cold but if I happen to kill it, I have to use the choke to restart it warm (!?) The starter turns over the same either way (slow) but won't fire as easily when the engine is warm. I've wondered about vapor lock and have toyed with the idea of re-routing the fuel line, but so far I've done nothing about it.



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