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Subject: Fuel system - cleaning

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Peter    Posted 11-10-2020 at 12:49:05 [URL] [DELETE]        [Reply] [Email]  
  • Fuel system - cleaning
  • 1942 9N - 12v with front distributor, points & rotor

    I was having problems keeping the engine running unless I fiddled with the choke as I drove along. Concluded I had a fuel starvation problem, so I cleaned the decades of sludge out of the glass bowl on the tank stop cock, cleaned the fine mesh filter in there as well. Then blew out the fuel line using the compressor and cleaned out the filter on the carburetor fuel intake. Swore at the seal on the glass bulb putting it back but I did get it to seal.

    I sprayed the carburetor with a liberal serving of cleaner for good measure.

    Changed the spark plugs while I was at it to brand new Autolite 467 and set the gap at .25 (it had champion J8 in before with a .28 gap)

    Full of pride at a job well done I climbed onto the seat and cranked her up with just a little choke. Engine just turned over with a smell of gasoline as the gas poured out of the bottom of the carb.

    Swore at the carb, hit it with a block of wood and sprayed some more cleaner in every opening. Still no luck. Carburetor looks to be original Marvel Schebler but the two halves are thoroughly glued together.

    Suggestions on where to go from here, Do I just need a new carburetor or is there some secret to getting it apart to have a go at rebuilding it (never done that before)


    Peter    Posted 11-10-2020 at 19:32:21 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel system - cleaning
  • Managed to get the carburetor apart using a bigger hammer and a cold chisel

    Inside there was a heavy build up on the float of some yellowish deposit. It was on everything inside

    Just now I am working on cleaning all the parts using the Dremel and a range of grinding bits.

    With a bit of luck it is restorable. It's a very heavy cast body so assume this is the original body

    Dead Eye Dave    Posted 11-11-2020 at 04:38:37 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Fuel system - cleaning
  • Peter, it may have been a better idea to just send the carburetor to one of the guys on this site who do the cleaning and rebuilding on a regular basis. Not all that expensive but money well spent. Good luck.

    Peter    Posted 11-11-2020 at 09:09:35 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel system - cleaning
  • Thanks for the suggestion Dave..

    There is a carb rebuilder in London ON which would save the costs of shipping / customs fees sending it to the US.

    I just separated the bowl from the body and polished the float and easily accessible surfaces without and further dismantling. One of my other hobbies is watch restoration so I can put the arb in the ultrasonic cleaner with some watch mechanism cleaner and that may be all that is needed.

    If not, I will take it to be rebuilt


    Dead Eye Dave    Posted 11-11-2020 at 15:31:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Fuel system - cleaning
  • A Canuck? It sounds like you are way ahead of me. I just used my 1952 8N to grade the road into my hunt camp today. Great machines. Dave

    Peter    Posted 11-11-2020 at 16:01:04 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel system - cleaning
  • I just got it last month for snow clearing and for using a brush hog on part of my couple of acres as the ride on mower was having a difficult time managing that area.

    In spring I make maple syrup and wanted a vehicle which wouldn't get stuck as easily as the converted riding mower #2 I was using for that.

    I picked the N series as they are relatively cheap and parts are available and inexpensive. The killer with parts is the shipping, a $100 part ends up costing more like $225.00 up here. A $ 33.00 carb rebuild kit is $70.00 here whether I buy from the local farm dealer or on line.

    Thanks for the kind words and encouragement.


    Peter    Posted 11-19-2020 at 11:46:57 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel system - cleaning
  • I am pleased to report that I have had success cleaning the parts and putting them back together and the old tractor now runs and is just about ready for the driveway clearing task arrives.


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