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mule 550 won't run


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Toss some gas or spray some carb cleaner/starting fluid down the carb throat.

spray it where the duct from the air filter goes to the carb. Then try to start it.

if it does fuel is not making it to through the new carb.

next take out the spark plug and spray some carb cleaner or pour a small amount of gas down the hole, put the plug back in. And turn it over.

if none of these give any results  lift the bed and  unplug the coil ground wire, it's right behind the governor linkage. Then try to start it.

if you want I can upload you some troubleshooting  pages from my shop manual to look at.

Next you might try to unhook the fuel line coming from the pump, to the carb, turn the engine over and gas should shoot out of the pump.

one of the least likely options would be to pull the valve cover and  be sure the valves are operating correctly/not out of time. thats a last last resort.

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23 minutes ago, Travis said:

Here is the coil ground wire. Unplug it right there. Black wire

It's next to th oil fill cap. 

IMG_20190818_144239.jpg

On 4/22/2018 at 9:20 PM, Travis said:

As far as I know, no.  Did you look at kawasakipartshouse.com ? O EM parts, but a bit cheaper. I'm rebuilding my 550 now.

What parts were missing? There are quite a few 1000 parts on Ebay.

 

I did find another issue and it started...it does idle good but has a very severe hesitation on acceleration...i did put on a new omw carb. Hardly has enough power to move...any thoughts?

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1 hour ago, Willy M said:

couldn't resist! Do you have a fuel filter on this model? Could be clogged.  Also any small crack in a fuel line can do bad things.  Does the engine have points and condenser or the newer electronics?

donkey-carrot-300x202.jpg

This engine has a ignition coil on the flywheel, no points.

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Its possible, as old as these engines are, (15+)  I would buy a inline spark tester, like one you would use on a Briggs engine,  this is one like i have. you  hook it up to the plug wire, and clip it to ground, or on the spark plug, if you've got a orange, yellow spark, coil is weak, if its blue or white, thats great! another thing could be a faulty spark plug, sometimes under higher pressure (such as revving the engine) the spark wont jump the gap, the plug i use on the 550 is NGK  i BPR5ES. i would also be sure the plug gap is correct, should be 0.028-0.030, you might also try gapping it slight smaller than spec, if your coils weak it wont have enough oomf to jump the gap over high pressure. EDIT: one thing i would do, is when it starts to bog while revving, choke the engine, about 1/4 of the way, then half choke, then about 3/4  of fully choked. if it runs better while being choked you have a lean mixture of air and fuel. or more air, not much fuel.

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Yes...that is correct....it will just stutter etc...I did notice the spark is Oran g ish and it seems to weaken after spinning the engine over after 10-20 seconds.  I ordered a new coil for it. I did take an empty cloth and shine up the magnet...reset the gap to .0012 per spec's. So hopefully that will fix it.

 

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