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Old 02-25-2011, 07:24 AM   post #1 of 14 (permalink)
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Unhappy Briggs and Stratton engine won't start help please anyone

Good afternoon forum,
first time on the forum so please be gentle. I have a problem with a hayer 56 lawnmower which runs on a briggs and Stratton engine. It has been laid up all over winter, got it out today just to make sure she is ready for mowing and the dam thing won't start, my neighbour said to clean the plug and poor a small amount of petrol done the plug hole so i have and she fires and runs for a few seconds then dies and nothing.
I have unscrewed the 13mm plug/bolt under the carburettor to see if fuel is getting in and it is so now i am lost really want to get her going. can anyone help me with and indication as to what to do next please.

regards

tony
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Old 02-25-2011, 08:44 AM   post #2 of 14 (permalink)
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Hello Tony. That can be frustrating. Did anything run out when you took that plug out?

At the risk of sounding too simplistic, and I only ask because I've done it myself, but there is fresh gas in the tank, right? If your petrol is like ours over here, it tends to go stale, and it's best to start out the season with fresh gasoline. And if there is a shut off in the fuel line, is it turned on so the gas will flow? Again, I only ask because I've pulled on a mower's rope more than once, only to realize I didn't check the gas in the tank, or forgot to turn the fuel shut off to the on position. Something else, I once had a mower that insisted on having a tank that was more than half full of gas to start. Any less than half, and no go. Fill it up and it would happily run until empty. Never could figure that one out, but maybe yours is particular that way too.

Here's a check list that Briggs and Stratton offers up under their FAQ section.
http://www.briggsandstratton.com/eng...0starting.aspx

I'm sure others will offer up their help soon too.

Last edited by bwdbrn1; 02-25-2011 at 08:52 AM.
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Old 02-25-2011, 09:06 AM   post #3 of 14 (permalink)
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Default Briggs and Stratton engine won't start help please anyone Reply to Thread

hi
thanks for the reply i have tried all the obvious, put a tank of fresh gas and still she wants to try my patience. i have decided to leave it until tomorrow now as i want to try and get some other suggestions. i will not give up on it though.

regards

tony
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Old 02-25-2011, 01:59 PM   post #4 of 14 (permalink)
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I am going to guess that the jets are probably clogged from sitting over the winter. If you could get some fuel line cleaner in the carb and let that sit, or take the carb off and clean out all the small orifices, you would probably be ready to go.

Keep the info coming, and we'll work with you 'til its running like a well oiled sewing machine!
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Old 02-26-2011, 09:42 AM   post #5 of 14 (permalink)
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Funny how we refer to these contraptions in the feminine gender when they test our patience. I would agree with Brad, after having insured the obvious, probably some goo stuck in there somewhere. It's not a hard job, but can be sort of fiddly. Squirt a bit of cleaner through the air cleaner opening as he suggested, and see what happens.

Maybe your carb is among those on this page, and you might find some help here.
Small Engine Equipment Troubleshooting, Repairs and Safety
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Old 02-28-2011, 10:05 AM   post #6 of 14 (permalink)
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Hi, if it has sit all winter it prob. has the most common prob. of small engines, a gummed Carb. Take it apart and clean the bowl,including jets and float. spray good with carb cleaner and you should be good to go . Oh also make sure to put all fresh gas to start it as well as check for spark. If this does not work you may need to richen fuel mixture or dump some gas down the carb to see if gas will pull up through the carb on its own. Could also need a seal kit for getting gas to the carb. Always make sure to dump out all gas and put in some Stable just before putting it away to ensure easy starting next year.
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Old 03-03-2011, 01:51 AM   post #7 of 14 (permalink)
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Default hayter 56 problems

Quote:
Originally Posted by LawnBoy View Post
Hi, if it has sit all winter it prob. has the most common prob. of small engines, a gummed Carb. Take it apart and clean the bowl,including jets and float. spray good with carb cleaner and you should be good to go . Oh also make sure to put all fresh gas to start it as well as check for spark. If this does not work you may need to richen fuel mixture or dump some gas down the carb to see if gas will pull up through the carb on its own. Could also need a seal kit for getting gas to the carb. Always make sure to dump out all gas and put in some Stable just before putting it away to ensure easy starting next year.
I have taken the carb apart cleaned it with carb cleaner, blew with a compressor all over to make sure it was clean etc bought a new plug for it put it all together again and no go she will not start.
I pour fuel down the plug hole pull the recoil and she fires for a few seconds well i suppose until the fuel i poured down has finished but thats it. Any other ideas please???

regards

tony
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Old 03-03-2011, 07:16 AM   post #8 of 14 (permalink)
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You've got to be on the right track Tony. Many of us have found that this process has to be repeated sometimes because there just seems to be some bit of gunk that tenaciously hangs on in there somewhere. Shooting carb cleaner into all the various holes, followed by compressed air into those same holes usually clears the problems, but sometimes it takes a second effort. Depending on the carb, some thread very fine wire into the holes to clear obstructions. I've had carbs that literally had to soak in a can full of cleaner overnight to get the job done.

Would it be possible for you to share the numbers specific to your engine so we might all take a look at information specific to the carb carb you have?
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Old 03-03-2011, 09:40 AM   post #9 of 14 (permalink)
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Default Hayter 56

Hi all
i cant seem to find any engine numbers i have taken some pictures of the engine perhaps that can help you professionals.
I have found two sets of numbers on the carburettor they are 8843 and 1128 not sure what they relate to but again they might help you.
if you require any further info pleas let me know.

regards

tony
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Old 03-03-2011, 12:02 PM   post #10 of 14 (permalink)
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Oh no, you don't have that carb?! Just kidding.

The engine numbers I was talking about are those on the shroud just above the spark plug and throttle cable.

Mind you, I claim to be nothing more than an amateur that has had some luck at getting engines to run. I am, however, a professional at taking the satisfaction of hearing an engine run that previously hadn't. There is no doubt more folks out there who know much more than I about such matters, but if nothing else, I'll give you my 2 cents worth, and lots of moral support.

Anyway, backing up, here's my check list.

All the hoses, gasket, and rubbery bendy things are in good shape, check.

All the cables were put back into the same holes they came out of on all the various pivot arms, check.

Now that I think I'm done, no extra parts left on the work bench, check.

All of the controls move and pivot freely as they should, check.

It sputters and acts like it wants to run when you pour gas into the spark plug hole, check.

By putting the gas in the spark plug hole, you're basically choking it. I acts like it's going to run, but stops when that bit of gas you pour in is gone. So, it's not pulling the gas from the tank through all the tiny little holes the carb and delivering it to the cylinder where it can do what all good engines should do.

Does the gas run readily out of the gas tank when you pull the fuel line from the carb? If not, the clog is somewhere in the fuel line or in the tank.

Does the gas run freely out of the bottom of the carb when you remove the nut and bowl. With the bowl out of the way, can you stop and start the flow of fuel by raising and lowering the float. If not, there's a clog in the float valve.

If the gas is spilling about and making your hands all smelly, and dirtying up your garage floor to this point, then there must be a clog between the bowl and venturi keeping it from arriving at the final resting place for combustibles in the engine.

Take a look at these photos and directions to see if they look anything like your carb. Maybe this will help.
Disassembly of Briggs and Stratton / Walbro LMS Carb on Briggs Engine 125K02 0137

Last edited by bwdbrn1; 03-03-2011 at 12:06 PM.
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