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Harry Ferguson Tractors Discussion Forum
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TO20 Hard Start

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Rick

08-02-2003 16:41:16




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I bought a 49 TO20 last fall and used it to plow my drive this past winter. It had its moments over the course of the winter where it was difficult to start. This spring I decided to perform maintenace. I replaced the normal ignition items: plugs, wires, points, and condenser. After replacing these items, I expected the thing to run smoother because there had been a slight noticeable miss at idle. However there was no improvement so I also cleaned fuel bowl and removed and dissassembeled the carbeurator. In addition I replaced the oil and oil filter. Now, the tractor is very difficult to start when engine is cold and it floods immediately and then can only be started at full throttle. When it does start, the blue smoke just rolls out of it and talk about stink. I can't decide if there is something I've done to it to make it run this poorly or if it;s just time to rebuild the engine. It has had this miss since I purchased it. When I removed two of the spark plugs to replace them they appeared soaked in oil. How about some expert advice. I'd be mighty grateful! Note: once I get all the blue smoke cleared out after it does start at full throttle, when I take it down to idle, it idles OK yet still with a slight miss.

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Jerry/ MT

08-02-2003 21:20:45




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 Re: TO20 Hard Start in reply to Rick, 08-02-2003 16:41:16  
Rick, You said you "...cleaned and disassembled..."
the carburetor. Did you replace and adjust the he float valve? The flooding could be caused by a poorly adjusted float or a bad float valve. Did you adjust the mixture properly?What about the aircleaner? The old oil bath aircleaners are notorious for not being maintained. The fact that you found oil on the plugs implies the oil control rings are worn or stuck or the valve guides are worn. The slight miss could be an ignition problem or it could be your valves are burned or not adjusted properly or the fuel/air mixture is not adjusted right.
Hope this helps.

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Rick

08-03-2003 05:41:32




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 Re: Re: TO20 Hard Start in reply to Jerry/ MT, 08-02-2003 21:20:45  
Thanks Jerry/ MT. The float valve seemed fine. In fact the carb in general was surprisingly clean. All I did was dissasemble it, removed bothe the idle and power screws, cleaned it and put it back together and mounted it on the tractor. I set the screws to specifications found in owners manual. Now for the oil bath air cleaner. This could be part of the problem as could the rings and valves. I could not separate the actual air cleaner element from the housing so I sprayed carb cleaner into it and allowed it to dry thouroughly. I housing that comes along with the element seemed to be original equipment and I couldn't see a dealer having the housing available. I wonder if this procedure has clogged the filtering and is causing the flooding at when starting? Any additional comments will be appreciated.

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Jerry/MT

08-04-2003 15:58:21




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 Re: Re: Re: TO20 Hard Start in reply to Rick, 08-03-2003 05:41:32  
Rick:
Did you assure yourself that the float setting was right? These M/S carbs seem really sensitive to float setting. My experience with cleaning an oil bath air cleaner is that is takes a lot of soaking with the likes of lacquer thinner or mineral spirits to get the gunk off the filter filler material if it is really not been properly maintained. My process has been to soak them in a bucket of solvent overnight and pour the solvent through them over a bucket several times over a period of days. A final clean rinse with solvent will tell you whether or not you got most of it. After you have it cleaned out (as well as cleaning out the oil cup) refill the cup with the proper ammout of specified oil and restart the tractor. Hope this is of some help to you.

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