Go BottomCub Cadet 7300 missing under load
 | Blueman
Join Date: Jul 2003 Posts: 243 Washington, PA 
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2007-09-24 146021
My buddy has a 7300 that he has replaced the fuel filter, air filter, has good fuel in it, etc. Idles fine, no smoke, runs well until it goes under a load (using FEL or mower or driving up hill) Then it starts missing terribly. Seems to work fine with low RPMS under 2000 RPM. Any ideas?
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 | hardwood
Join Date: Dec 2002 Posts: 3583 iowa 
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2007-09-24 146029
Blueman: You don't say if the tractor is a gasoline or diesel engine. If it is a gas your symptoms usually indicate a weak spark that won't fire under highre cylinder pressures of load. Check the spark plugs, if they are the right plug and appear good, then work your way back to the distributor, etc., something will show up. Diesels seldom develop a "Miss", unlesss an individual injector goes bad, they either run weak or just stop. 9 times out of ten if a diesel runs slow or weak the fuel filters are to blame. Frank. ....
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 | earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan
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2007-09-24 146032
Like Frank said---gas or diesel---makes a huge amount difference! ....
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 | Art White
Join Date: Jan 2000 Posts: 6898 Waterville New York
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2007-09-24 146039
The 7300 is definfitely diesel and I'd look for a plugged fuel line. We often fint that as the most common problem with them. For the described problem I'd next head for the injectors. ....
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 | candoarms
Join Date: Mar 2007 Posts: 1932 North Dakota 
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2007-09-25 146042
Blueman,
Once you've eliminated any possibility of a fuel delivery problem........
At higher RPMs, the valve train may be the problem. Possibly a weak or broken valve spring, or even a valve timing problem.
Valve problems usually show up at higher RPMs.
Joel ....
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| Blueman
Join Date: Jul 2003 Posts: 243 Washington, PA
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2007-09-25 146053
My fault, I forgot they may have made these in gasoline, but this one is a diesel... ....
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