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Ferguson TO35

Two cylinders not firing

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Larry Stewart

10-17-1998 17:31:30

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Good spark coming to all four plugs. Compression on all cylinders approximately 120 lbs per sq inch. But the mystery is cylinders 3 and 4 are not functioning. I can remove these two plug wires with no difference in engine performance or starting. Any ideas, please?

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Dennis

10-19-1998 11:36:51

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Re: Ferguson TO35 - Two cylinders not firing in reply to Larry Stewart, 10-17-1998 17:31:30

Had exactly the same problem with my to-30. Exactly the same symptoms. Found I had a broken valve spring. The valve wouldn't close and number three cylinder would compress over into number 4 really mesing up the compression check. It really stumped me until I pulled the valve cover. Ignition in either cylnder would fire over to the other which already had an open valve. Good luck !!

: Good spark coming to all four plugs. Compression on all cylinders approximately 120 lbs per sq inch. But the mystery is cylinders 3 and 4 are not functioning. I can remove these two plug wires with no difference in engine performance or starting. Any ideas, please?

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Jack in NB

10-18-1998 03:23:44

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Re: Ferguson TO35 - Two cylinders not firing in reply to Larry Stewart, 10-17-1998 17:31:30

Defective spark plugs? I've had them looking good, but shorting to ground inside the steel body. Try swapping 3 & 4 with 1 & 2.

Blown intake gasket? Test - with engine running, turn a propane or acetylene torch on a bit (not lit) and feed the gas along the intake manifold near #3 & 4 cyls. If it smooths out, that's the problem.

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Harry

10-18-1998 05:03:51

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Re: Re: Ferguson TO35 - Two cylinders not firing in reply to Jack in NB, 10-18-1998 03:23:44

That is good advice, sounds like someone who has been there.

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