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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 35 won't start

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William Pugh

01-01-2005 10:02:46




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I have a MF 35 Gas it won't fire I have spark it seems to be in time I am getting gas but it just cranks and cranks but won't fire inf ayone can help I would apperciate it thanks




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txblu

01-02-2005 18:04:42




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 Re: MF 35 won't start in reply to William Pugh, 01-01-2005 10:02:46  
Tom has some great ideas but I have a quickey that will help with minimum effort before you do a lot of that work.

Pull a plug and look at it. If it is dry you don't have any gas getting to the combustion chamber. Put it back and try starting while squirting some statring fluid in the air intake. It should kick right off....for a second.

If wet, you have ignition problems.

Then go a lookin for the culprit spark or fuel.

Mark

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Tom G (OK)

01-01-2005 14:30:22




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 Re: MF 35 won't start in reply to William Pugh, 01-01-2005 10:02:46  
I have A 2135 gas with a Continental Z134.

First, you could try maybe unflooding it by opening the choke (unchoked) stepping on the gas and cranking it for about thirty seconds (my owner's manual says not to crank it for more than thirty seconds at a time and then letting it sit for about two minutes to allow the starter to cool off)
Then choke it and try starting it again. Then try some starter fluid. Just a little squirt every ten seconds into the air cleaner while cranking.
Then pull all the spark plugs to see if they're fouled. You can clean them off with a wire brush and a nail file (be sure to set the gap (usually .025")). If they foul frequently, try adding plug extenders. They just screw into the plug holes and the plugs screw into them. They separate the plug from the combustion chamber to prevent fouling.
If none of this works, how about a compression test? If you don't have a gauge, just hold your finger over the spark plug hole and have someone crank it. You should feel good suction and it'll blow your finger off (of the hole). If you have a gauge, my service manual says that with a warm engine and @ 150RPM crankin speed, it should develop 130-145 psi. I guess it would be a little lower for a cold engine. The main thing is that all four should be pretty close to the same compression. You could also check to see if your air cleaner is clogged up.
Lessee, Fuel, spark, air, compression.... it should be running. OH yeah, you could drain some gas out from the bottom of the sediment bowl. Maybe it has water in it. run it out generously (say, a minute).

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