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Harry Ferguson Tractors Discussion Forum
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TO35 sputtering and stalling

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Bob Weeks

02-24-2006 19:14:30




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My newly purchased 1955 TO35 had been given a complete tune-up just before I bought it. After replacing the steering gear and shaft, adding a new coil with a built in resister, and rewiring the instrument panel, I put it to work. After about an hour of running it started to sputter and sometimes stall out completely. It would usually start up but ran rough.
I tried nearly every trick I knew, including rebuilding the carb. I finally decided to swap out the new condencer with an old one I'd saved when I tuned up my TO20 a couple years back. The 35 started up and has been running fine since. It just goes to show that even new parts can be defective or go bad well before expected.
Hope this experience may help someone. I have received so much great advice from this forum.
Thanks to all of you.

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RandyR

02-26-2006 19:11:11




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 Re: TO35 sputtering and stalling in reply to Bob Weeks, 02-24-2006 19:14:30  
When you need to do another tune up, you could bypass the whole point and condenser thing by installing a Pertronix electronic ignition. It"s real simple and fits neatly under the distributor cap. I put one on mine and it runs great.
Here"s the part # if you"re interested: 1143.
And here"s where I got it: Link



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Bob Weeks

02-26-2006 19:48:58




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 Re: TO35 sputtering and stalling in reply to RandyR, 02-26-2006 19:11:11  
A week ago I was ready to order a Pertronix electronic module but looked for information on the Net and found a number of people who had real bad performance from them. Most of the responces werefrom people who had installed them on antique cars, but there were so many unfavorable comments it made me change my mind. It seemed like the module worked for a few hours then went bad. How long have you been using yours? Is it on a 12volt converted system? Which tractor do you have it on? I would love to get rid of the points and condencer if I could be confident of getting some good components.I have a 1955 TO35 and a 1949 TO20.

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RandyR

02-27-2006 07:36:40




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 Re: TO35 sputtering and stalling in reply to Bob Weeks, 02-26-2006 19:48:58  
I installed it in September planning to use it to plow snow, then we got no snow. So I can't give a long term report on mine, but my neighbour has one on his 72 trans am, and has had no trouble for the last 3 years. He drives it all the time from spring to fall.
They can fail if the coil doesn't have the right resistance. They need a 3.5 ohm resistance across the primary, (measure with an ohm meter), but some coils are less than 1 ohm, and that will ruin it. I wouldn't leave the ignition key in the "run" position with the engine stopped.
Also some folks might have voltage regulator trouble giving too much voltage to the coil. That's another good reason for a 3.5 ohm coil. Mine is an MF 35, like a TO 35, with the same engine, Z 134 Contiental, and factory 12 volt with an original Delco generator. These old gennies need to be watched for voltage, their not as consistant as alternators. The regulators can be adjusted for that. If my gennie fails, I'll install an alternator, with a built in regulator.

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Bob Weeks

02-27-2006 20:10:03




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 Re: TO35 sputtering and stalling in reply to RandyR, 02-27-2006 07:36:40  
Thanks for the reply. I have a new NAPA IC-14 coil with a built-in resister. The alternator is a three wire type generic, probably similar to a GM 10-SI. The electrics seem to be working fine except that the Alternator will not excite at low rpm(s). I either have to jumper the P1 and BAT. terminal momentarily or rev the engine.
I want to keep researching the electronic ignition issue with hopes that I can be assured of reliability.

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SandyB@TN

02-28-2006 15:09:12




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 Re: TO35 sputtering and stalling in reply to Bob Weeks, 02-27-2006 20:10:03  
Bob,
I have a TO-35, Z134 Continental. I've had the Pertronix Electronic ignition in mine for four years. Starts right up and runs great. If I had it to do over, I'd do it again. Andy, at Genesee, is real good to work with. Right now he's looking for a 3000 rpm tach for my TO-35.



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Bob Weeks

02-28-2006 19:11:08




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 Re: TO35 sputtering and stalling in reply to SandyB@TN, 02-28-2006 15:09:12  
SandyB,
Thanks for the report and your success with the electronic ignition. It helps bring things into better perspective. I also searched the archives last night and found more positive comments.
I also have a 1949 TO20 with original 6 volt ignition and generator. I have a lot of spark plug fouling even though there is no oil burning. I think a hotter spark would really help this problem. I guess I won't know till I try the elec. ign. module.

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SandyB@TN

03-01-2006 18:13:35




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 Re: TO35 sputtering and stalling in reply to Bob Weeks, 02-28-2006 19:11:08  
Bob,
You do know that you will have to change the 6 volt system to 12 volt to get it to work? I had to change my TO-20 over. It handled it just fine. You just can't grind on the starter for long periods, but you shouldn't have to do that anyway, if the thing is running like it should. Another thought is that the spark plugs you are running in the 20 may be too cold. When I first got my 20 that was the situation. I wish I could tell you what the spark plug numbers were, but I've slept once or twice since then and I can't even remember what's in my 35 right now.

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Joe (IN)

02-26-2006 07:39:37




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 Re: TO35 sputtering and stalling in reply to Bob Weeks, 02-24-2006 19:14:30  
Yeah, it never fails to amaze me that we have the technology to put men in space and get them back in one piece, but we can't manage to produce reliable simple oelectrical components like condensers, coils, and voltage regulators. I dread replacing voltage regulators on any of my 8N's because I usually have to buy 3 or 4 before I get one that actually works. And those all say made in the USA! The quality is pathetic and we're really not being given a choice but to accept it.

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