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Starting a U302

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RWK in WI

01-23-1999 19:30:02




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I have gotten a U302 but don't know anthing about its history. It looks to be in good shape. It started easily this bummer but doesn't like to start in cold weather without jumping it. Battery tests good. I am hoping for some hints how MM's start best: throtle closed or open - how much. Choke or no choke to start, etc. It has a tune up and fresh 10W- 30 oil.

Thanks for any help. I need it for snowplowing.
Dick

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Jeremy Fiorelli

01-25-1999 14:54:36




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 Re: Starting a U302 in reply to RWK in WI, 01-23-1999 19:30:02  
Find your coils resistor it should be close to the coil on the wire coming from the battery, try shorting across that to start it. The
resistor is there so it doesn�t burn the points but it reduces the spark so after it starts you don�t want to short across it. Normally the gas tractors don't need that but the LP's start easier some times. I am guessing you have a gas tractor so if that helps you may want to replace the resistor so you don't have to short across it. Most of the gas MM's we have we open the throttle a little and choke them, normally they
start right off.

The LP's are very particular about having the throttle closed when starting. We start cranking at a dead idle and then may
partially crack open the throttle. If they haven't started after cranking for 10 to 15 seconds we'll short accost the resistor
normally that will start them.

Most of the time if you have to choke a LP you don't have the throttle at an idle or the idle is not set right.

There are lots of things you can also check. Spark plugs could be gaped wrong or worn out, weak coil, points gaped wrong or
croaded, cap, rotor, and spark plug wires.

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RWK in WI

01-26-1999 19:40:49




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 Re: Re: Starting a U302 in reply to Jeremy Fiorelli, 01-25-1999 14:54:36  
Sorry I should have said it was gas. I never thought about LP. It had a tune up this summer by a good mechanic who regularly works on my Ford tractors. I know it got plugs, points, and wires. I'm not sure about cap or rotor but believe if he thought it needed them he would have done them. Will try bypassing the resistor and see if that helps. Do MMs usually turn over slow? I am wondering about the long battery cable from the starter to the battery by the drivers seat. Looks to be about 2 or 4 gauge. Should it be heavier?
I'm used to starting my Fords but am having trouble with this MM.

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Joe Leising

01-27-1999 16:28:11




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 Re: Re: Re: Starting a U302 in reply to RWK in WI, 01-26-1999 19:40:49  
I would replace the cables (both hot and ground) with the heaviest gauge, highest quality cables that you can find. It takes more amperage to turn over the engine in the cold weather and if the cables are old or small or both the resistance will be high enough to cause the engine to turn over slow because the starter is "starving" for "juice". If everything else is good, assuming the starter is ok and not "dragging", the new cables should fix the problem.

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