olenoid on carb bad getting to much fuel? Gas in oil to.
Craftsman

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Or the exhaust heating up,expanding and making whatever leak you had,bigger

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You Lose Power in the Middle of Mowing:

Here`s why this happens and what you can do: Dirty Air Filter on Your Lawn Mower: Clean or replace. Dirty Spark Plug: Clean or replace. Build Up of Clippings & Debris: Clean underside of your lawn mower deck as noted above.

What causes fuel to leak into my engine oil? The fuel shut-off valve isn`t closed properly. Fuel float in the carburetor being stuck in the open position due to gumming (caused by stale fuel) or debris.
Common signs include poor cold start performance, the Check Engine Light coming on, and failing an emissions test.
A full gas tank and oil reservoir are the essential first steps when checking why the lawn mower won`t stay running, but the problem could also be a dirty filter, clogged carburetor, improper fuel mixture, or a dirty spark plug.
While corporate executives who preside over failure often find someone else to blame, Briggs` demise has, in reality, directly resulted from its executives` mismanagement, greed and pathological animosity towards the unionized workers who had made them rich. Reprinted with permission of Wisconsin Examiner.
A faulty solenoid will cause the engine not to start even if it is cranking.

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Have a craftsman 16″ chain saw 358.360260. Could not initially get it started after it had sat for a couple years with fuel stabilizer in it. When I went to use it the fuel had all evaporated and the fuel pick line was rotted. I replaced that with some difficulty but finally got it on. Saw still wouldn’t start. Replaced the fuel filter. Still wouldn’t start. Pulled the carb apart and cleaned and recleaned everything. Diaphragms were good and I didn’t adjust any of the mixture screws because as I said it ran fine before storage. Non of the carb passages were clogged. Fresh gas 40:1, good spark plug and good spark. Airfilter is good. Engine has maybe about 4 hours of total run time on it. It’s a ZAMA (?) carb. It will run for about 30 seconds when I manually prime it by pouring a small amount of fuel directly though the carb. When I was disassembling the carb the vent hose that goes back into the fuel tank seemed to have a small out of ?substance? in it which I cleaned out. It was right at the end the of the hose that goes back into the fuel tank and not up by the carb. It didn’t appear to be like your typical gummy deposits/varnish though. I hope it wasn?t some type of spongy check valve stuff that is supposed to be in there. That might explain some of my problems. Anyway, I also can not seem to get the primer bulb to fill. When I open the fuel tank, look in side and depress the primer bulb, air bubbles come out of the fuel filter. But when I let the bulb reexpand there’s no fuel that gets sucked up the hose. I can however seem to fill the primer bulb when the fuel tank is full and the chainsaw is laying on it?s pull cord side and the bulb is depressed a bunch of times. The saw will also start and run again for about 15 seconds then die. It’s definitely not getting/fuel and probably running out . Thanks.
ANSWER :

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Need gas mix solution – Craftsman 25cc 2-Cycle Gas Blower/Vac
ANSWER : Check age of gas. Cannot be more than 30 days old.

Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio
(1 gal.) Gas to 3.2 oz. Oil).Do not use old or stale oil/gas mixture. Always
use the proper oil/gas mix. If you do not, your engine will suffer rapid,
permanent damage.

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What type of oil for 17.5 42 500 cc – Craftsman 17.5 hp 42 in. Deck Lawn Tractor – CA Model
ANSWER : I use straight 30wt.

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My 42 in Craftsman Tractor will not start. It normally runs great. I went to start it the other day and it ran for about 5 seconds before shutting down. It felt like it was getting no fuel. Any Suggestions?
ANSWER : Try and run it with the gas cap loose the vent could be plugged also see if it cuts out while keeping you foot on the brake and its just a bad safety switch shutting it off

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Oil leaking from under the exhaust mower has been
ANSWER : Souds like the carb needs cleand out it has stuck open and let the gas run in to the moter

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Hi there, quick question, there is a black and grey wire on the 13.5hp briggs and stratton, i am unsure which is the earth and which is the power?
ANSWER : The grey one should get power when the key is turned on. This opens the solenoid valve on the carb and lets fuel in. The black one should get earthed when the key is turned off, this shorts out the coil and stops the spark. Aussie Steve.

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Can you put synthetic oil in a briggs and stratton motors
ANSWER : Every time i tried they started to leak

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I have a Poulan push mower that after mowing in a ditch started making a loud noise and running rough. It almost sounded as if metal was hitting metal. The mower was vibrating more than normal. I checked under the mower and nothing is hitting. After a few times of stopping the mower engine because it sound as if it is going to die down the mower will not start now. The shaft does not appear bent and the blade appears ok. The mower has oil, a good spark plug and a clean air filter. It was running fine until that moment. I did not see anything that I hit but it is possible I hit something in the ditch like a pine cone or branch. What could the problem be and how would I go about fixing it?
ANSWER : If you are sure the oil level is correct then it sounds like it’s about to die, unfortunately. A pine cone shouldn’t cause any damage, but a large branch may do so. Was it smoking before you shut it down? The vibration could be caused from a bent blade. It could also be caused from a part breaking in the motor. I wish I could have given you better news!

Good Luck,

Jim

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