Author Topic: spittn', sputtern' & popn'  (Read 8776 times)

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Offline Rooster

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Re: spittn', sputtern' & popn'
« Reply #15 on: May 03, 2011, 04:33:13 PM »
Mine has always blown fuel out of the carb. Everyone I build does that, I do not know why they do that, but they do!
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Offline Squidd

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Re: spittn', sputtern' & popn'
« Reply #16 on: May 03, 2011, 04:34:30 PM »
Cam timing overlap
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Offline Caudy155

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Re: spittn', sputtern' & popn'
« Reply #17 on: May 03, 2011, 07:17:22 PM »
hmmm the only reason i asked is cuz my friends opie would do the same but he had oiled his prefilter and it was restricting the carb too much and would cause it to burp and fart and hardly run... might want to check valve lash seen that cause it too... maybe flywheel key also?
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Offline westcoast racer

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Re: spittn', sputtern' & popn'
« Reply #18 on: May 09, 2011, 11:00:23 AM »
Ok I know that it is carb problem now for sure.  I can't figure out why it still acts up.  I cleaned it and blew out every orifice in it.  It ran great for 5 minutes with good power and response.  Then it went to crap again.  I have a good inline filter so it shouldn't get any dirt in it.  It acts like it can't get fuel.  I pulled the cap off the tank to make sure it was venting and still have the same problem.  No matter what I did it would not RPM up and then it would all of a sudden surge and jump up and then backfire and drop RPM.  It would surge like this until I got mad and parked the mower which was about another 5 minutes.  I have a good pulse on the pump.  What could cause it to run so sporadic?
Dan Borba

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Re: spittn', sputtern' & popn'
« Reply #19 on: May 09, 2011, 11:13:21 AM »
Pump failure?


Offline Jeff Digou (Pitguy)

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Re: spittn', sputtern' & popn'
« Reply #20 on: May 09, 2011, 11:41:51 AM »
Recent Test and Tune for Soltra,  A guy had a spider nest in his fuel line that was causing that same problem

Windsor Ontario Canada<br /
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Offline westcoast racer

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Re: spittn', sputtern' & popn'
« Reply #21 on: May 09, 2011, 12:15:02 PM »
Pump failure?

Why would it run good for 5 minutes and then start acting up?  And then it would never run right after that.  Could an air leak after the carb cause the same problems, bad gaskets?
Dan Borba

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Re: spittn', sputtern' & popn'
« Reply #22 on: May 09, 2011, 01:23:39 PM »
Just giving suggestions...

Offline tonykummrow

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Re: spittn', sputtern' & popn'
« Reply #23 on: May 09, 2011, 07:56:43 PM »
have you checked the coil?
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Offline Old Goat

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Re: spittn', sputtern' & popn'
« Reply #24 on: May 09, 2011, 08:40:13 PM »
have you checked the coil?

I have heard they are hard on coils. If it runs OK after it sits for a while and cools down, it could possibly be a bad coil.
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Offline Rooster

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Re: spittn', sputtern' & popn'
« Reply #25 on: May 09, 2011, 09:15:53 PM »

I have heard they are hard on coils. If it runs OK after it sits for a while and cools down, it could possibly be a bad coil.
Ohh crap...hey try changing the coil...
Bert stole my cookies!!
 I think he used them to bribe Ed into something naughty?

http://www.cutlooseracing.com

Offline tonykummrow

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Re: spittn', sputtern' & popn'
« Reply #26 on: May 10, 2011, 04:10:01 AM »
rooster did you have a chicken poop moment? up north here we call them brain farts.
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Offline Bolens16

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Re: spittn', sputtern' & popn'
« Reply #27 on: May 10, 2011, 04:59:40 AM »
Had an oppy once that would run OK for 15mins then develop a misfire. A timing light revealed the problem. I replaced the coil problem over. It would only misfire hot.
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Offline GTX21

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Re: spittn', sputtern' & popn'
« Reply #28 on: May 10, 2011, 06:31:41 AM »
Opposed are know for that^
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Offline westcoast racer

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Re: spittn', sputtern' & popn'
« Reply #29 on: May 14, 2011, 12:34:28 PM »
Finally going to get a chance to race this bad boy today.  I totally rebuilt the carb.  I think I had a bad diaphragm.  It seems to be running perfect now.  We will see how it races.  Wish me luck.
Dan Borba

 

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