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WJC
08-03-2010, 08:18 PM
I have an FH580V 19 HP Kawasaki with 550 hours on it and it sputters when you put a load on the engine. Only does it when its hot. I've kept up with the valves adjustment since new. I've only run synthetic oil in it. Keep the filter clean. New plugs. New fuel filter.I tightened up the air gap on the coils to .012" from .014 to see if that would help, but had no effect.. Engine does not burn oil. Starts and runs fine for about 30 mins. then starts to sputter under a load.
If anyone has had this problem and can shed some light on it, I would appreciate it.

laman
08-03-2010, 09:21 PM
Sounds like a coil is acting up. Sounds like a coil is acting up. Find restorob older post and you will find the instuctions on how to do it.

WJC
08-03-2010, 11:30 PM
Thanks for your advice, I'll look at some older posts

topsites
08-04-2010, 12:16 AM
I second the ignition coil diagnosis.

WJC
08-04-2010, 09:34 AM
I appreciate the advice. I have a 13 hp kawi twin, and I'm gonna see if it has the same part # coils on it. If it does, I'll swap them out to see if it corrects the problem. Thanks again

A Leaf Above
08-05-2010, 06:55 AM
Also check the little rubber hose that runs from fuel pump to top of valve cover...If it doesnt make a good fit it will cause motor to sputter also ..

WJC
08-05-2010, 06:28 PM
That little hose appears to be ok.

laman
08-05-2010, 08:06 PM
Have you checked coils yet?

WJC
08-05-2010, 08:59 PM
I looked through older restrorob posts and could not find any that described how to check coil resistance. I checked the coils on my 13 hp kawi, but one of those is a different part # than the other, my 19 hp engine has identical part # for both coils. I was going to swap them to see if it fixed it. I might just try it anyway if I cant find a resistance check.

BigFish
08-05-2010, 10:12 PM
Try this: http://www.lawnsite.com/showthread.php?t=284338
Sometimes though, a coil will wring out OK when cold ,but then acts up when hot. Good luck.

laman
08-05-2010, 10:39 PM
Hey thanks bigfish, I didn't know how to link it....

WJC
08-05-2010, 10:56 PM
Thanks for the link, I'll check them on Saturday. I have a feeling that they will check good. This mower always starts right up hot or cold but sputters under a load when good and hot, especially after idling awhile then throttle up and turn on blades.

WJC
08-07-2010, 11:31 PM
I ohmed out the coils today and one of them was not within spec, so i swapped it with a coil from my 13hp motor and i'll see if it fixes the problem on monday when i'll be mowing again.

WJC
08-09-2010, 05:50 PM
Used my mower all day today with no sputtering, ran perfect all day. Thanks for the help on this problem guys, you definately made it easier to deal with.