Question about Briggs & Stratton Briggs Stratton Lawnmower Lawn Mower Short Block

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I have a Master cut 3.5 , the spark plug is not with the mower and we cannot remember the spec of the spark plug !!! Any idea

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If that is a 3.5 HP Briggs Engine you're referring to then I believe you want a (Champion) CJ8 plug. Cross-references to the following mfg's:
Autolite 255, Bosch WS8E, Champion CJ8, 843, NGK BM6A, JOHN DEERE AM54450, LESCO 010769
. Hope this helps
James

Posted on May 27, 2011

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2 Answers

What is the spark plug gap supposed to be?


Hi
If you enter your model number (and serial number if you have it) at the link below, you'll have access to your owner's manual which will tell you what your spark plug gap should be.
Hope this helps.
-Steve


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1 Answer

Mower wont start


you will have to check a few things to diagnose it:

1) check the spark plug. check it for spark with a spark tester (best way) or by holding it against the engine metal somewhere and give a pull to see if you see a spark. If no spark go to #3 else go to #2.

2) if you have spark, you need to see if it turns over. get some starting fluid and just give it a quick spray in the intake (air filter usually) to the carburator. try starting it fairly quickly before the spray evaporates. If the engine turns over, then you have a carburator, fuel or fuel tank problem.

3) if you have no spark, replace the spark plug. if you still have no spark likely you need a new starter coil.

Remember you could have a combination of both of these types of problems.

RayRay



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1 Answer

Honda gv100 cutting out


Bad plug. Bad gas. Dirty carb. Dirty air cleaner.

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1 Answer

Lawn mower won't start


Sounds like gummed up. Remove carb and filter and clean with gas. Clean all lines. Try not to use ethanol

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2 Answers

John deere gx345 has no spark at plug what is the cause?


need new coil pack or have short in harness grounding engine from running. check fuel line to carburator. 1. take float bowel off bottom of carb. do not touch float or pin holding float. crank engine over until fuel comes out of carb. If fuel comes out, you don't have fuel problem. put float bowel back on carb. 2. check for spark. take spark plug out of mower. put wire back on plug and place the threads on head [or metal of engine to ground the plug]. crank engine over for a few seconds to see if plug gets spark . [always double check with another spark plug that is good]. [[ Remember!!! you have to have someone sitting on the lawnmower to start. unless you by-pass safety switch [only do this if you understand how the safety switch works. NOT EXPLAINED HERE!!!]] If spark is present, there is no grounding problem. when engine is cool. 3. CHECK COIL PACK. for continuity. When the coil pack gets hot it will stop any juice to the plug. A>Check temp sensor B> Check Safety switches grounding out. C> Check for cut wiring harnes. [loose wires rubbing against pulleys, wires cut by rodents]. Hope this helps.........................GAS

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1 Answer

Toro GTS 6.5 HP doesn't run well in grass. Any ideas?


Has the fuel filter been replaced lately? Also you can look to see if the new spark plugs are getting fouled out still. Sometimes just replacing the spark plugs wont fix the problem.

Feb 17, 2012 | Garden

1 Answer

Cub cadet 1405, has new battery & starter. cranks over great with plug removed , won' t crank at all with spark plug in. any ideas?


You didn't indicate which engine we are working on, but here are a couple of ideas.
It is possible that the starter is weak. If this is the problem, replace the starter.
It is also possible that the compression release is not working. Try adjusting the valves back to factory specs.
Good Luck!

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1 Answer

Spark plug wire will not stay on


just an idea is there a lot of vibration on the cutting head as this can cause the problem or you might just have to replace the HT lead for a slightly longer one.

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