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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Unsteady Timing

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Randyr

06-23-2007 19:08:16




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When I went to adjust the timing I couldn"t really set it. It was all over the place. MF35, Z134 Continental engine.
Could this cause exhaust popping noise?
What could be causing the erratic timing?
Thanks.




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Gerald J.

06-23-2007 20:08:27




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 Re: Unsteady Timing in reply to Randyr, 06-23-2007 19:08:16  
Badly worn bushings and distributor shaft.

Gerald J.



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Rodger

06-23-2007 19:40:55




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 Re: Unsteady Timing in reply to Randyr, 06-23-2007 19:08:16  
An intermitting short in the low voltage circuit 6 or 12 volts can cause very erratic timing.
Good luck



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Randyr

06-23-2007 22:18:51




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 Re: Unsteady Timing in reply to Rodger, 06-23-2007 19:40:55  
Ok thanks for the answers. I went looking on the net and have seen new and rebuilt distributors for sale. Do the new ones use the same cap, rotor, dust cover and internals as the old ones? I have a Pertronix in mine and it would be nice if I did have to replace the dist that I could just swap in the Pertronix.
Of course I'll check the wiring first, I'd like a cheap fix.



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Jerry/MT

06-24-2007 14:15:16




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 Re: Unsteady Timing in reply to Randyr, 06-23-2007 22:18:51  
Check for shaft/bushing wear. With the points closed, push radiallly (from the side) while observing the shaft and then the points. the allowable radial runout is 0.002" so the shaft should have a barely perceptable motion and the points should not move. If you can notice movement in the shaft or if the pooints move your shaft and/or bushing is worn.

Have you looked around for an auto electric shop that can rebuild your distributor?

Generally when you get a rebuilt distributor the cap and rotor, points, etc do not come with it. You'll have to ask the seller what it comes with. Your Pertonix should fit a rebuilt distributor since they are "drop in" units.

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