520 Surge Issues

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14 Oct 2015 16:16 #8757 by Geno
Replied by Geno on topic 520 Surge Issues
That is real interesting, in every lean case a little choking fixes that type of stuff. It is really good news to hear though! :woo

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14 Oct 2015 16:26 #8760 by FewMoreMiles
Replied by FewMoreMiles on topic 520 Surge Issues
Yeah the choke definitely didn't do anything for me in this case. I was really sweating over this one. For some reason I thought surge was related to valve seat...so glad that wasn't the case here. The tractor got a good once over though lol. Thanks for taking time out of your already busy day. I am thankful for everyone's help.

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14 Oct 2015 17:03 #8761 by Geno
Replied by Geno on topic 520 Surge Issues
It is due for a valve adjustment at 500 hours also, sooner is usually better. :)

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14 Oct 2015 19:49 #8763 by M Bailey
Replied by M Bailey on topic 520 Surge Issues
Good job Jeff, that should cure the overheating as well :thumb1

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27 Oct 2015 21:16 #8967 by JustinW.73
Replied by JustinW.73 on topic 520 Surge Issues
Valve seating problems don't normally cause an engine to surge, it can, but 99% of the time it isn't. In my small experience, surging (with that much compression) is only caused by fuel problem, like clogged jet, fuel line, pump, sometimes filter. If the valves aren't seating, then it will only have like 40ish psi (remember that some engines, especially the Kohlers, have compression release on the exhaust valve). And it will be hard to start, if it does start it will be weak/sluggish.

1973 No Name 16
1966 856
1964 854
198? 520H
Way too many decks
1966 f100

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