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View Full Version : Mower runs low on Rpm's and then speeds up

VnDrWLawnCare
09-10-2002, 01:38 PM
Hello, I have a 17hp Kaw with 380 hours on it. I started it up and it seemed to only be running on 1 cylinder. So i put new plugs in it and that did not seem to help. So i thought that i would try to run it as is. With the blades engaged and full throtle, it will only turn 2600 Rpm's. After a few minutes though it will suddenly go up to 3500 Rpm's without doing anything. I thought that it could be a bad spark plug wire, however i am not sure. If anyone has any suggestions please let me know. Thanks for you assistance.:(
Floridalandcare
09-10-2002, 03:27 PM
Could be a bad coil .
thfireman
09-10-2002, 03:30 PM
Florida has it right, replace the coil.:(
awm
09-10-2002, 03:43 PM
dont know if this might be a factor but
my lazers seat switch and engageblade switch bothe just cut it to one cylinder. i wasnt always thatway. but its possible u have a safety switch causin this.. in other wds faulty.
dfor
09-10-2002, 05:16 PM
Sounds like a bad coil. My 17 hp Kawasaki has gone through a few coils in about 2.5 years. I pull the spark plug wire and if it still runs the same, well then that is the bad coil. I asked my dealer why I was going through so many coils (every 6 -9 months or so. He called a service technician at Kawasaki. They said to do the same, except to replace the other coil. Makes absolutely no sense to me, but next time I'll give it a try and see what happens.
jrodgers
09-10-2002, 08:56 PM
My 15's and 17's have had bad coils with relativly low hours.
TJLC
09-10-2002, 09:06 PM
That is the EXACT same thing my 18hp Kohler was doing. Dealer replaced the coils and it runs like new again. I do recall before I took it in for repair I could pull one of the plug wires off while it was acting up and there was no change.
awm
09-11-2002, 08:44 AM
good to know about this coil thing. never had that problem,but ill recognise it when i see it now.
D&V
09-11-2002, 10:15 PM
How much does this usually cost to fix? I am having the same problem on my 19 horse Kaw.
jrodgers
09-11-2002, 10:27 PM
Mine was under warantee so I dont know. If I were to guess I would say somewhere in the $40 to $50 range
thfireman
09-11-2002, 10:51 PM
If I would have had mine fixed by the shop it was something like $125.00 but I bought the part and it was around $62.50 or something like that. They got it you need it. They got you!:(
Doc Pete
09-11-2002, 11:16 PM
Originally posted by thfireman
Florida has it right, replace the coil.:(

Yup, the coil went on my 17, too. It ended up being heat related. If I ran the mower, once it got hot it would run on one cylinder.........Check..... they are under warrentte...
Pete