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Massey Harris & Massey Ferguson Tractors Discussion Forum
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spark plugs cont 176 MF 65

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tractor dan

06-26-2004 06:53:14




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My MF 65 tractor was running so poorly that I thought I had a stuck valve and was ready to do a valve job. My manual says to run D16 plugs. When I bought the tractor it had D21s but I thought it was because the owner had been using it in the winter to blow snow. When I switched out the two cylinders that were running poorly and put in D21s the tractor began running like a swiss watch. Any experience with those plugs? Should I put a high perfomance coil on the engine?

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Ethor Fil

06-27-2004 14:43:57




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 Re: spark plugs cont 176 MF 65 in reply to tractor dan, 06-26-2004 06:53:14  
I don't know what you mean by "switched out two cylinders" . . . ? Before doing a valve job or any other thing major it would be wise to run a compression test on all the cylinders. #1 being the closest to the radiator. I recently bough a Massey Ferguson MF65 in what I call a mint condition and drove it home. Very little to do to it but to check a few things. By taking a compression test you can determine is there has been any enternal engine damage. Broken or worn rings, wore or broken valves and value guides. My tractor has a compression ratio of 8 - 1.0 . A high compression rating. The compression ration in each cylinder might vary but should be no more that 15 apart in readings. Also check the exhaust at the top of the exhaust pipe. See if it is sooty and black. Wet and black. Will tell you if the tractor is using oil or the carb adjustment is not right. Float may be set too high or low. The tractor came with Autolite 386 spark plugs. As long as everyting else is in sync there is no need to use special plugs. Orginals are fine. Autolite works for me. The spark plug cables that I use are 77 mm High Temperture Radio Suppression Cable. The coil wire is the same as the spark plug wires. With spark plug wires and coil wires, distributor cap and rotor you want to elimate straying voltage that will short out the system and cause poor performance. Don't know if this will help or if you already knew about all this because I don't know the level of your expertise.

E. Michael Fil

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