Question about Electrical Supplies
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Posted on Jan 02, 2017
Any time a small engine is hard to pull you need to check your valve clearances. If they check out look for a bent push rod. Also check your spark plug anytime it backfires. Even if it appears to be good I would replace it since they are cheap and can go bad and not show any signs of a problem.
Finding top dead center: Remove your spark, remove your valve cover, pull over your engine slowly, watch for the intake valve to open, once it starts closing put a long screwdriver down the hole on top of the piston. As you pull your recoil rope let the screwdiver follow the piston up until you hit the highest point. At TDC you will notice that it will not move for about a 1/4" pull of the recoil rope. It may take a few attempts. And alway reverify your valve setting after making adjustments by finding TDC again and checking the clearances.
Check the valve clearances they should be .005-.007on your intake and .007-.009 on your exhaust. The intake is always closes to the carb and exhaust to the muffler. The slightest bend in a push rod will do this and is hard to detect. The best way to check them is to remove both rods and on a smooth clean surface roll them together and watch the gap between them. If they are good the gap should remain constant. If other, replace both rods since they are cheap and with one bent it's hard to tell if the other is slightly bent.
Note: Before doing any of this; shut off your fuel, remove your spark plug and pull over the engine a few times. Any excess fuel in the head should come flying out. It's a good idea to spray a little carb cleaner in the cylinder via the spark plug hole to help dry up any oil if present when doing this.
Posted on Mar 30, 2009
Have you checked for a bad head gasket?
Check the intake valve springs or the intake valve shafts to be sure they aren't stuck open. Another cause could be excessive carbon build up on the intake valve causing them to not seal.
If you've gone this far, you could try a compression leak down test. If you still have the push rods out, you can use or get an adapter that will allow you to pressurize the cylinder(s) with air by removing the spark plug. Apply 70-80 psi air directly to the cylinder (the cylinder may go to BDC (bottom dead center) but if you don't have any push rods, the valves can't open.
Listen carefully - if you hear air leaking out of the carb, it's a bad intake valve. If you hear air from the exhaust, it's an exhaust valve. If you hear air from the crankcase breather, it's piston rings.
Posted on May 03, 2009
one idea is to check the amount of oil you are putting in....remember...you mustn't flip the gen. to fill it....keep it level and keep filling until the oil level is visable and about to drip out...that's the right amount....if you overfill it it will cause the problem you pointed.
Posted on Nov 05, 2009
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