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Briggs Trouble...


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#1 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 01:39 PM

Well, Was using the Bolens 900 with the non original Briggs engine. The past few times I used it, it would stall. I would get off and give it a pull and it would fire up and run fine for another 10 -20minutes or so. I thought it may be vapor lock in the fuel line so I re-routed the fuel line and even checked the gas cap for a plugged hole and it still would stall. When it stalls it doesn't give any warning signs of stalling, it just shuts right off. But all you have to do is give it 1 pull and she would fire up again. Yesterday when I was mowing it stalled again and I started it back up and only ran about another minute. Yesterday it was stalling more than ever before. I can only get her to run for about 1-2 minutes now... Another thing I forgot to mention is when the tractor is at medium to low throttle it will run without stalling its only when your using it at high throttle. I thought maybe the coil may be on its way out?? When it stalled I quickly took out the plug and checked for spark and it still was getting spark. So now I'm thinking the carb may need some attention....
Any thoughts?:confuse:

#2 olcowhand ONLINE  

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Posted October 10, 2010 - 02:00 PM

It would seem the coil to me, but after checking for spark, must be fuel related. Fuel level in bowl would do that, so maybe the float is sticking? Hard to say, but if it isn't spark, it's fuel or valves.

#3 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 03:56 PM

Would valves make it stop running without any warning?.... You would think if it was valves then it would kind of start running funny... In this case it just stops dead, no sputter of any kind.
I took apart the carb and the float and main jet look good. The only thing I saw that could be a problem was the needle valve had a pretty deep groove around it.
I'll give it a good cleaning and replace the needle valve

#4 jdslednut ONLINE  

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Posted October 10, 2010 - 04:37 PM

Has the fuel line been replaced? There could be a fuel line particle(s) that finds its way to the float needle/seat that cuts off your fuel. When the engine is stopped and the intake of the engine is retarded it may cause just enough time for the bowl to fill up again to allow for a few more minutes of running time. Could be a valve lash problem that corrects itself with just a small time to cool the valve train. I wouldn't look past points/condenser if so equipped. I've had many problems solved with a simple replacement - seemed like fuel and everything would point to fuel but the spark was the issue usually due to heat and a defective condenser. Just what I'd check.

#5 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 04:48 PM

Yeah I replaced the filter and fuel line....
I'm going to check the valves and grind them down if need be and clean up the carb and see what happens. If that's not the issue It's got to be coil/points/condenser

#6 olcowhand ONLINE  

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Posted October 10, 2010 - 04:59 PM

Valves being tight & getting tighter as heat expands WOULD give warning.

#7 NUTNDUN OFFLINE  

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Posted October 10, 2010 - 05:07 PM

I think if it just dies with no signs then it is something electrical. If it was the valves there would be some sign like lack of power. If it was fuel related it would spit and sputter or it would seem like the carb wouldn't hold a tune.

#8 DH1 ONLINE  

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Posted October 10, 2010 - 05:11 PM

Pull the fuel line off the carb. and see how much fuel flow you have out of the line from the tank.
If little then that's your problem, clean out the tank or back blow the line.

#9 caseguy OFFLINE  

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Posted October 10, 2010 - 06:03 PM

I struggled with a coil issue all last week. (See the original post in the link below) It was on a Kohler engine, but it gave lots of warning before it died. The spark became intermittent at high RPM's after the engine got hot. It would still run OK at Idle though. The way that I finally caught it was to put one of those $3 visual inline spark testers with the light bulb on it when it started acting up. In your case you could wait for it to stall and put the tester inline then start it back up to see what happens, if anything, to the spark when it dies. I have to say that it sounds like a fuel issue to me too, but that's what I thought about the Kohler as well. When it stalls, can you choke it and get it to pick back up?

http://www.gttalk.co...2438/#post22229

#10 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 06:09 PM

Pull the fuel line off the carb. and see how much fuel flow you have out of the line from the tank.
If little then that's your problem, clean out the tank or back blow the line.


Already checked it a few weeks ago...even took the tank off and cleaned it out

#11 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 06:35 PM

Figured I'd post a pic of the engine..briggs 001.jpg

Attached Thumbnails

  • bolens 900 new 036.jpg


#12 MH81 ONLINE  

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Posted October 10, 2010 - 06:56 PM

Is that a 90 degree fitting on the inlet of the carb? I fought & fought with a Continental / Marvel setup & someone had put a 90 with a screen in it on the inlet to the carb. Guess what was almost plugged off? Run great for 2-3 minutes, then die.
Start it & repeat.
Maddening.

When I figured it out, I just pulled the screen out/off & put the 90 back in... ran like a top.

#13 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 08:37 PM

Yep, its a 90
I'm going to take a look at that right now Never thought of that....

#14 Bolens 1000 ONLINE  

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Posted October 10, 2010 - 08:42 PM

Just looked, no screen

#15 MH81 ONLINE  

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Posted October 10, 2010 - 09:17 PM

Rats




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