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What is spark plug gap for quantum xm/big bob 50 mower?

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Posted on Jan 02, 2017

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SOURCE: Need spark plug gap for Viking MT830 ride on mower

Briggs & Stratton suggests 30 thousands of an inch for this engine.

Posted on Nov 22, 2008


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1 Answer

How much sae30 oil does the b&s quantum Xm 50 take? I've just got an old mower with that engine & have drained the old oil but can't find a manual with that info.

normally in the area of 300 mills or around a pint
poor some in and check the dip stick or if no dip stick but a plug in the sump , until the oil is level with the thread in the hole

Jul 17, 2017 | Garden

1 Answer

My rover ranger ride on mower has been sitting for 7 or 8 years it has no spark even though i have changed the spark plug have you any areas ? regards Bob

Bob it could be that the magnetism of the magnets of the flywheel has diminished, or their is corrosion in the gap between magnets and Coil. Spin the motor over very fast with a pneumatic or electric socket gun, with the plug out, on the lead and earthed, to check for spark then.Also check for corrosion/contact to the on/off switch and key. To delve further, loosen the flywheel nut, don't remove, but ensure it is level or slightly above the thread on the shaft. Place a large screwdriver or lever under 2 sides of the flywheel, and gently tap the nut/shaft while GENTLY levering the flywheel up. Once it's loose, remove the nut and flywheel and inspect inside for rust particles or loose wires. A closer plug gap will also help if spark is too weak to jump, but re-adjust once you have had it running a while-it may not rev properly with too close spark gap.

Oct 17, 2016 | Garden

1 Answer

Quantum xls 50

First check to see if you have enough oil then check if the air filter needs cleaned, if yes then clean it or replace it. Then check the spark plug is tightened to specs, not tight enough to damage threads! If it is neither of those check to make sure you are getting a good spark at the plug. If not get new plug if not check the magneto for proper gap.

May 22, 2013 | Briggs & Stratton Garden

1 Answer

What is the correct gap setting for a Champion RJ2YLE spark plug used in a Toro Lawn mower?

Briggs & Stratton Part Number 799876 replaces Champion plug RJ2YLE. For use in Quantum Series 625, 675, and 725 engines built after Date Code 110701xx. The gap for this spark plug should be set to .020". This spark plug should not be used with Quantum Series 625, 675, and 725 engines built before Date Code 110701xx, or any other L-head engine family.

Apr 20, 2013 | Toro Garden

2 Answers

I am replacing the spark plug on a 5 hp Quantum engine that is on a Troy Bilt walk behind mower. I would like to know the spark plug gap setting on that motor.

I'm guessing you have a standard Champion J19LM plug, which has a gap of .030. They come pre-gapped from the mfg. and usually no need to adjust them. Most of the plugs on these engines have a .030 gap. There are very few exceptions that use a .020 gap (such as the RC12YC). Anyway, here's a link to a chart I like to use for reference: (there's a drop down menu at the top to change engines, but the standard Briggs engine is the one here).
Hope this helps. James

Aug 06, 2011 | Briggs & Stratton Garden

1 Answer

B&S Quantum Power 4hp won't start with fresh plug,

Did it run before you changed the plug?Gap is correct, flywheel shear pin may be bad, Water in the Gas?

Jul 02, 2011 | Poulan "" Push Mower

1 Answer

How to change the starting rope on a quantum xm 50 lawn mower?

easy replace coil unit it comes with a new cord easy to change out skill level 2

Nov 05, 2010 | Briggs & Stratton Garden

7 Answers

Spark plug

The gap is .025
Please remember to rate this fix.

Oct 26, 2008 | 2006 Subaru Legacy

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