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Honda 5.5 hp motor problems on pressure washer. HELP

J

JBMac76

Member
I've got this Honda motor, it's rare that I have ever had a problem with one. But i am baffled. Heres the deal, it runs for about 45 seconds and shuts off. If you squeze the trigger, it dies right away. So I thought: sticking float needle valve or lack of fuel from tank, obstruction somewhere. But, if you crack the drain screw at the bottom of the carb bowl as soon as it shuts off, it pours fuel out steadily. Just in case , I put a brand new carb off an Identical motor on it, same exact problem. Has fat, blue spark on the ignition test. Any suggestions on where to look next. Air filter is new, I cant figure it out
 
I had a Honda that started to act that way only it would wait a bit longer and just to mess my mind it did it very erratically. Finally tied off the low oil shut down and it worked great.
 
Yes, I thought about that and unhooked it. Ive seen them go bad before. Maybe I'll replace the coil next, I think I have eliminated fuel as a problem
 
Unhook the kill switch and try it that way. I have had two different motors have that problem this spring. The kill switchs where grounding out when on. They would check okay with and ohm meter but when they viberated they grounded out.
 
I had one that was acting up and it turned out to be a bad spark plug. It would run just long enough to get the plug hot then die. Depending on how fast you ran the motor how long it took. I swore it was a carb problem but turned out to be a plug that would fail when it reached a certain temperature.
 
Also disconnect the "low oil" switch if used, long enough to see if it causes the shut down. They do fail.
 
Mac Does it still have compression after it dies? I had a lawn mower that a valve would stick and motor would die. Just added a little marvel mystery oil to each tank of gas. Never died again. Just a thought. Bernie Steffen
 
Thats funny Art, and I would not put it past me to leave the bag on the filter, but asI posted seperately, it was the plug. Never would have guessed it, the original plug was clean (dark chocolate brown) and sparked good on testing
 
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