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Magneto air gap for rover powermaster with east start motor

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Hi magneto air gap is normally 10 thou but if there is no play in the top crank bearing you can close it up to 8 thou.

Posted on Jul 25, 2009

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Posted on Jan 02, 2017

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My riding mower won't start, new starter spark plug and fuel filter. Now what?


You did not post any information about the motor. There is a specific gap between the magneto and the flywheel and also the flywheel has a woodruff key to make sure the timing is correct. Check for spark, check gap on magneto and check magneto if you don't have spark.

Apr 27, 2017 | Garden

1 Answer

How do I get spark


Make sure the magneto is not grounded and make sure the air gap between the flywheel magnet and magneto is set to specs. If air gap is too wide, it will be difficult for the magneto to produce an efficient spark.

May 07, 2014 | Poulan PP5020AV 20 in. 50cc Gas Chainsaw

1 Answer

Briggs Twin opposed 402707 16hp hard to start because it always starts on 1 cyl. the other cyl fires a little. good cyl. is 80psi bad is 70psi. Runs fine when warmed up. air fins are clean. when turned...


Hello John,
Is your spark weaker on 2nd cylinder? If thats the case I would replace the magneto. If spark is equal on both I would look at valves.I am willing to bet it is valves. I would check valves and adjust gap and try again. You could also set air gap of magneto also, but I think it is valves.

Sep 27, 2013 | Briggs & Stratton Garden

1 Answer

Model 917.275670 wil turn over but not start


There could be several problems. (1) Is it getting fuel to the carburetor? If not check fuel filter. (2) There is also,a fuel solenoid that controls fuel going to the carburetor,when the ignition switch is off the the solenoid closes a valve,stopping fuel to the carb. When the ignition switch is on the solenoid opens the valve,allowing fuel to the carb. You will know it is functioning,when you hear a small click,when you turn on the ignition switch. If you don't,then this solenoid is bad. (3) Is the spark plug fouled up with carbon deposits,if it is,clean with a wire brush. Replace plug wire,turn on ignition switch,rotate motor until you see a spark,if you see a spark,is it weak looking? If so,replace plug with a new plug. Any time you remove a spark plug,check the spark plug gap, should be .030" for a Briggs& Stratton motor. Use your Owners's Manual,for the correct gap,for your motor. Now,if you haven't,seen a spark at the plug it could be a bad plug wire. Replace the plug wire and run your test again,if you still not see a spark,then the magneto,it self is bad,these seldom go bad. More likely the fly wheel and the magneto has corroded (rust) on both parts. This breaks the magnetic field,thus no current to the spark plug. Take a look at the small electrical wires attached to the magneto,are they broken or corroded at the connectors. These wires lead to the ignition system. If corroded,clean the ends or if the wires are broken splice wire or replace the magneto. You should,take a good visual look,at the carburetor,is it dirty? Is the air filter(s) dirty? It they are dirty,clean by using compressed air or wash and let dry. Remember this,the motor has to have three items to start and run.(1) Air (air filter),(2) Fuel (carburetor& fuel filter) (3) Igniter (Spark Plug). These have to be cleaned or replaced often,these are the most problem(s) of a "No Start" situation. I hope this helps. Sincerely,Brad Locke DTD 12/04/15

Apr 10, 2013 | Sears Garden

1 Answer

Not getting spark to plug on eagerbeaver 2014


Jeffuxum:

The magneto is probably where the problem is. You'll need to pull the cover off of the motor and check the gap between the magneto and the flywheel. If the bolts holding the magneto have vibrated loose, the gap between the magneto and the flywheel will be incorrect. While you have the motor cover off, check the wiring to make sure you don't have a short in your ignition wiring and clean the air filter. I don't remember what the gap is between the flywheel and magneto, but .010 In. sounds familiar. Both legs of the magneto should be the same distance from the flywheel and they must not touch the flywheel at any point. I have used a matchbook cover between the flywheel and magneto while I tightened the magneto retention screws and it worked.

Jan 18, 2013 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

1 Answer

Won't start, changed plug, set gap on magneto still no spark


To test magneto leave properly mounted and gapped to the motor. unplug black wire from magneto. Crank motor and test for spark. If you get spark with the wire unplugged then the magneto is fine and your problem is in the wiring system, likely a safety switch. If you have no spark with the wire unplugged then the magneto is bad and needs to be replaced.
BTW, the black wire is a ground. That is what shuts the motor off when you turn the key to off or when you get out of the seat, etc. So the motor will not shut off with that wire unplugged. Also, putting any voltage on that wire will immediately damage the coil.

Oct 20, 2012 | Mtd Garden

1 Answer

My Stihl ms361c won't start. Want to check air gap on the magneto.Re-set the timing.How? do I do this?


Pull off the side cover where the cord is.Make sure the keyway in the flywheel is not broke and flywheel has not turned.If flywheel did not turn the timing is fine.Too set the air gap you have to loosen the screws on the magneto .Slip a piece of paper or metal that is .010 thick between magneto and flywheel and turn flywheel until magnet pulls magneto down.tighten screws and reinstall cover.

Nov 29, 2010 | Husqvarna Garden

2 Answers

I NEED TO KNOW THE SPARK PLUG GAP AND MAGNITO GAP FOR A POLAN CHAINSAW MODEL # 2375


Spark plug gap is .025

As for the air gap in-between the flywheel, and magneto, I generally start with a piece of notebook paper in-between them.

After the bolts are snugged down, turn the flywheel by hand to spin the paper out.

Oct 29, 2009 | Poulan Wild Thing 2375 18" Gas Chain Saw...

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