Home Forums TaG New starting problem Leopard

This topic contains 25 replies, has 13 voices, and was last updated by  Paul Jones 4 months, 4 weeks ago.

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  • #7998

    Marty Troup
    Participant

    07  leopard

    Has been Flawless for 5 years and now is having starting issues.

    I was acting like a weak battery as it would start to turn over then disengage the starter

    New battery and still the same but it would start sometimes very few and sometimes it would crank over fine but would not start….new plug still no run then it would start and run fine on track but in pits with low idle it would die and would not start again.

    I rebuilt starter and still would act strange.. it would crank over fine but would not fire up. It seemed to try to start in the first 1/2 second but would not catch or fire like it had no spark..

    1:   Is it the ignition box

    2: Has anyone had the same trouble..

    Thanks fore any Help!!

    #8084

    Roberto Perez
    Participant

    How does it start with external?

     

     

    #8085

    Roberto Perez
    Participant

    How does it start with external? 

     

     

    #8106

    Marty Troup
    Participant

    I do not have one anymore sold it two years ago..

    It is always like that..

    #8417

    Juan David Gomez
    Participant

    Check the grounding

    #8437

    tony zambos
    Participant

    Marty,

    +1 for the other two suggestions.  Did you do anything else besides working on the starter like pulling out the plug or removing the carb?  From where did you purchase the replacement battery?  I’ve bought some from battery stores  that were useless on a Leopard

    #8455

    Marty Troup
    Participant

    I have tried all above and one in 25 times it will start and then it will not start.

    It will attempt to turn over than the bendix disengages or will act like a low battery

    then 2 seconds later it will turn over just fine but not fire up.

    Battery is new even bought 2 and same..

    Strange thing is that after starting if it idles it will die and this is new..

     

    Thanks for the info!!

    #8612

    Jay
    Participant

    I wouldn’t expect the Leopard to idle well… although if yours used to but now doesn’t that is interesting. Someone suggested the ground strap–did you remove, clean, and reinstall the ground lug to your engine block? Check the coil wire clip where it connects near the clutch cover. Clean the tab and tighten the clip by crimping it gently a bit with pliers. When was the last time that you changed your fuel filter? A dirty/clogged fuel filter can upset your carburetion.

     

    #8723

    Marty Troup
    Participant

    fuel is fine

    I rechecked and cleaned the grounding all was fine..

    same as before it seemes to start on first try but if you stop it or let it die it will not start even when it turns over fine as if it has no spark then on the next try it will pop through the exhaust or it will seem to try to start for a split second..

    Waiting for a external starter..

    I see where some are switching to a key start that I do not know about

    I have the last couple of leopards around here and there is no support near me. just the Rotax crowd…

     

    #8760

    Matt Dixon
    Participant

    Wiring harness they go bad all the time. Swap it out with a known working one test before buying a new one

     

    #9020

    Jay
    Participant

    I had a Yamaha YZ that behaved this way… it turned out be that the flywheel woodruff key had sheared and the flywheel was slipping on the crankshaft. About once in 25 tries the motor would fire but as soon as I tried to rev it the flywheel would slip again causing the timing to change. The engine would stall and refuse to start for another 25 or so attempt until the flywheel happened to slip into a close-to-correct position.

    #9024

    Marty Troup
    Participant

    Thanks Jay,

    When it runs it runs great just like before but it will not re-fire or seemes to die at low idle

    this is new..

    Strange actions I am leaning to the power pack as it seems like it is advancing the timing during starting IF Popping through exhaust and hard cranking—Then it will turn over normal but not fire up..

    #13216

    Marty Troup
    Participant

    Well not sure what or why but using the external starter it works fine.

    It starts up great but when using the push button it will not start even when it turns over fine..?????

    I changed the brushes and bearings but still the same..

    I have a new starter box coming but the season is ending here so I will try it on this oneas the box is for my other leopard..

     

    Thanks for the help just still unclear why it came up with this new problem..

    #13247

    tony zambos
    Participant

    Marty,
    How many hours since the last top-end on this motor? Wondering if the current problem is being caused by low compression.

    #13296

    Marty Troup
    Participant

    Thanks Tony but the compression is great and still run strong I think it is something in the box when you pull power to the starter it fails the spark circuit..

    #13459

    Oscar Biondi
    Participant

    Try a new plug

    #13727

    Marty Troup
    Participant

    Thanks Oscar.

    It is not the plug I have tried new ones.

    It will seem like it is the starter or low battery and try to turn over and pop through the exhaust and other times it will turn over fine but not fire,

    I have cleaned all contacts and ran jumper ground cables from the battery ground to the starter housing and cylinder head with the same results.

    When I start with the external Coleman it starts fine..

    Thanks for any help.

    #13806

    Bob Wimmer
    Participant

    I had the same problem with my pre 08 Leopard.  I tried swapping every single ignition component with no success until I replaced the flywheel/rotor.  Turns out the magnets were noticeably weaker than on a new one.  I guess the weak magnets could not create enough of a field to charge the coil.  Good luck.

     

    Bob

    #13850

    Marty Troup
    Participant

    Thanks Bob but did it start and run fine with a external starter.

    It might be that as it is older but just happened after I changed the clutch

    My clutch lasted 5 years until one arm broke..

    Thanks and let me know if yours went the same..

    #14346

    Bob Wimmer
    Participant

    Mine started giving me problems after a complete rebuild (the flywheel side bearing failed).  First it wouldn’t start with the off-board starter, but started fine with the on-board.  After a few races it wouldn’t start with either.  Tried everything and nothing solved the problem until I replaced the flywheel.

     

    Hope this helps.

    #14624

    John Dignan
    Participant

    Sounds lime a flywheel problem. Starts fine with external because you are turning the crank and with the on board starter the flywheel could be slipping

    #14676

    Jim Russell, Jr
    Participant

    I have seen issues similar to this where the bendix is full of chain lube. A dousing with WD-40 and brake cleaner to dissolve chain lube and a light oil to lubricate and things work great again.

    Otherwise earlier suggestions have been spot on.

    #15116

    Lake Speed
    Participant

    I once had a problem that sounds exactly like this. It turned out that the fuel pump dia. was stretched too much.  I put in a new dia. and the problem went away.  I am talking about the phenolic one with out any holes or flapper valves.

    #24323

    Josh Jensen
    Participant

    Marty, has there been any updates yet?  I’ve having the same problem and at my wit’s end…I’m about 3 seconds to just buy a new engine…

    #24328

    Marty Troup
    Participant

    Sorry Josh I have been busy and there is still too much snow to try anything

    but I have the new starter box with the wiring so I will try just the box first and if it still

    has the trouble I will change the wiring.

    It starts fine with the external starter and seems to run great.  I rebuilt the starter and re grounded everything with no help.

    It is not the motor just in the wiring.

    I will update when the snow melts and one of my tracks opens.

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