Question about Briggs Stratton H7159 & Stratton® 5500, 10 HP Generator

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Why is my generator leaking oil thru the engine?

Started the generator to let it run for a few minutes. Oil was pouring out thru the engine.

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SOURCE: generator starts runs with a miss for a minute or

If you have good spark, clean air filter (replace anyways), try choking it half way or so. If it runs better, then it is running too lean, probably a clogged orifice or jet in the carb. If choking it makes it run worse, then it is likely running too rich. Could be a float problem, or metering tube that is clogged and isn't spraying.

Posted on Jun 12, 2010

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What is the problem of my generator to stop automatically


First thing to check is the oil, could be a low oil shut off which is a very good thing to have!

Any equipment the sits a long time, check the oil first. if hi, see if there is water in the bottom (rain thru exhaust), if hi but thin, gas leaked thru carb, piston rings, and into oil. do not run until drained and new oil.

Most common problem would be old fuel and or water in the fuel. any small engine with occasional use should be kept near full with hi octane fuel with fuel stabilizer in it. any gas I by in the can gets stabilizer in it, as modern fuel gets more like kerosine after a month or so, and who knows how long it will be before it or equipment burns it all up. Keeping it full also reduces condensation of water vapor in the tank.

If you can drain your fuel from the carb., do it. If not easy, then add a bottle (or less) of fuel line anti-freeze then add good hi octane fuel. A drop of water in the carb. will keep it from running, especially when cold, (when hot it will vaporize and then restart). occasionally a spray of starting fluid will help get started and suck good fuel into system.

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Gasket needs replacing. Oil leak on engine and burns off after the engine has run for a bit. Check fuel lines and hoses of any kind.

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White smoke pours out of exhaust on my SV730 Kohler engine when I start it. Then it stops and the engine runs good. I think it is a bad valve guide or a valve isn't seated right and oil is running


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Gasoline in the oil is indication of fuel leaking past the needle and seat when the engine is not running (also high pressure in the fuel tank). You may be able to continue to use the generator with weak needle and seat (change oil) , however you must shut off the fuel when the engine is off. Easy fix however by installing carb kit. Find model number of the engine (stamped on fan cover) and contact small engine repair shop or look on line. Do not run the engine with gas in oil. Good luck.

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It maybe a crankshaft seal.
you will have to remove the genset from the engine.
Normally there is a Thru bolt aprox 12" long that is attached to the crankshaft.

1) remove the genset windings/housing from engine
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3) with a 2x4 block of wood laying on the metal of the armature (NOT the windings)
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*the shaft is tapered, and it will take a 'jar' to seperate the crank and the armature.

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I don't believe you have a problem with running your unit out in cold weather, it just does't make any since. There have to be a problem with the engine. If your unit is new or has been used very little, it is not broke in and has a to much blow-by. If this is the case you will find oil in your air clean and/or muffler. To fix it problem you need to change your oil and replace it with a organic oil which means not synthetic. Run your unit under 1/4 load for 15 minutes in your case about 15 amp at 120vac. This step it up to 30 amps at 120vac of 15 minutes then 45 amps for 15 min. Then about 60 amps for a good hour. After that step the unit back down to 45,30,and 15amps to allow the engine to cool-down properly. If you load your unit with 240vac instead of 120vac just divide the amps by two giving you 7.5, 15, 22.5, and 30amps. This should break your engine in. If you are still leaking/pushing out oil you more than likely have a bad seal, gasket, or something broken in you engine internally.

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