841

[DRD in Pa]

In May of last year I bought a 841. The tractor started and ran fine all summer and fall. Around Thanksgiving had tractor out pushing with blade on way back to shed it started coughing and sputtering and missing. Left tractor sit for about 3 weeks. One evening pulled out of shed to put chains on it shut off and would not start. I thought it was a carb problem. Installed a rebuild kit in carb around Christmas with no improvement.Work and weather prevented anymore work on tractor until late January. I checked and had no fire at plugs. Replaced coil checked points has new distibutor and points. It still has no fire when cranking. Voltage at coil drops to 3-4 volts when cranking. Hooked up another battery to coil. Has fire when cranking with other battery hooked to coil. When work and weather here in PA permits will get back to working on tractor any help or advice on what else to check would be greatly appreciated. Thank You!

 

[amstrad]

hello i have a 861 powermaster, which is about the same tractor. I had the same problem, which turned out to be faulty wiring. Good Luck DJ

 

[old]

A weak starter will cause that low voltage problem I would pull it and take it in to have it tested. Most place will test them for free

 

[Dean]

It is normal for the voltage at the coil (or anywhere else) to be 4 volts or less while cranking the engine due to the internal resistance of the battery (assuming your tractor still uses a 6V system).

Since you do have spark when a battery different from the one cranking the engine is powering the coil, I would first clean the points (new or otherwise) with an IBM card or piece of card stock or brown paper bag. Do not use a point file.

It is not uncommon for points (used or new) to develop an insulating coating during periods of unuse. The coating sometimes creates enough resistance to prevent starting due to low battery voltage during cranking but not enough resistance to prevent adequate spark with full battery voltage.

If cleaning the point contacts does not result in proper spark during cranking, suspect plug wires and or, spark plugs.

Dean

 

[Jr150]

seems like i had this same problem and was told to check the wire from the coil where it hooks to the side of the distribitor theres a insulator there that tends to short out. I just ran a wire right to the points and it worked. PS it's still that way lol

 

[DRD in Pa]

Was it all the wiring or just a certain one.

 

[DRD in Pa]

I dont think it is the starter the tractor was poppin and missing and backfiring after rebuilding the carb the same as it was before even when trying to pull start it. When it did finally start we couldnt keep it running.

 

[old]

You may have missed something or even made the carb worse when you worked on it. When you rebuild one you need to soak it at least 24 hours in a good carb cleaner like Berry mans and then blow it out real good and use a small wire etc to make sure ALL passage ways are open. You also need to make sure you have a good steady flow of gas to the carb and back out the carb drain plug. It is very very easy to miss something in a carb I know because I have rebuilt a lot of them an miss things once in a while my self

 

[amstrad]

hello my tractor has been converted to a 12 volt system and i used a reducer between the battery and the distributor it was the wire running from the reducer to the distributor. The insulation look good on the outside of the wire but it was broken on the inside. hope this helps DJ