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C292501-0105 Ignition swith diagram. Does it shut off magneto without impulse coupling for start function? other side has impulse coupling with 20 degree lag angle.

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On the 1974 xlch Harley Sportster 1000cc kick start is there a way to retard the spark on startup?

early harleys have an impulse magneto as the ignition system
that means that as you press on the crank pedal the piston moves up , the magneto is held back by a spring until it reaches a set timing point at which point it releases for maximum spark
the method of start this type of equipment is to kick start slowly and not as you would for conventional type kick start
you have probably noticed that if you try for a fast kick start it tends to throw the lever back up under your foot
Just an aside here --there was a joke about harleys with electric start--if it back fired your thumb would get broken
joke based on the fact of the impulse magneto that was replaced with an electric start system
the impulse magneto operation is what gives the harley the strange idle operation
get a harley workshop manual or talk to a harley service center for correct ignition timing of the impulse magneto

Nov 27, 2016 | Motorcycles

1 Answer

Magneto ignition diagram

there is ablck grounding wire on it follow it to groun point

Aug 24, 2014 | Snapper Garden

1 Answer

Magneto wiring diagram

Most magneto systems have an external connection from the points. Grounding this kills the ignition.

May 20, 2014 | Boating

2 Answers

Could the resistance to the starter be the reason that my starter is starting slow?

Jessy is correct, but there are a number of other points to note.

You didn\'t mention the aircraft type nor engine type, so I can\'t be too specific. The location of the battery is important; some aircraft have the battery in the back, some under a seat and some in the engine bay. The distance from the battery will have an effect on the starter. Earlier aircraft types have been known to have aluminium battery cables. If they are fitted on your aircraft you should change them to copper. (Most copper cables will be \'tinned\' so they will look silver, don\'t confuse them with aluminium). The engine is mounted with rubber mounting blocks, there should be a large earth strap or cable fixed to the engine from a \'ground\' point on the aircraft or engine mount. This earth lead is very important and should be very well secured. If it is not the starter will find an earth through other electrical leads such as the \'screening\' around the magneto switch leads or the alternator field leads. This can cause a fire. What I normally do is to take each earth lead and secure it using a \'shakeproof\' or \'star\' type locking washer between the lead head and the engine or airframe ground point, (like a sandwich). This helps to make a sound connection. The live leads should not be overlooked either, nor the condition of the battery and the battery terminals. Lastly, some of the smaller aircraft engines were plagued with bad starting due to the fact that the starter turned the engine too fast and the magneto impulse coupling retracted so not allowing the impulse to catch on the impulse pawl, thus the ignition was not retarded nor was the impulse \'wound up\' to give a good spark. The solution to this problem was to fit starters with a different gearing that slowed down the cranking speed. There is a Lycoming service letter on this subject. So, check that you have the correct starter fitted to the engine type - not all starters are the same!

Sep 10, 2012 | Champion Sport & Outdoor - Others

1 Answer

Electrical wire?

Because of the simplicity of the ignition system, there really is no diagram necessary. Husqvarna uses a simple two-wire harness in that unit (e.g., p/n 544 08 28-01) that has two female quick-connects at one end and one female quick-connect and a ring terminal at the other end.

The end with the ring connector is the magneto end. The female quick-connect there attaches to the magneto primary circuit control terminal, and the ring terminal there is secured under the head of one of the two magneto armature mounting screws.

The opposite end of the harness goes to the ON/OFF switch on the case side near the handle. This switch is a simple single-pole/single-throw switch that allows the engine to run when in its open position, and kills the engine when in its closed position. The engine shut-down occurs through the effective action of grounding the magneto control terminal to the magneto armature frame, as accomplished through the circuit through the ON/OFF switch when that switch is closed.

To identify the armature, harness and switch for your saw, go to the Husqvarna Manuals Download Page for your saw, identify the list by the build date of your saw, and download the desired list. (I like the 2009-02 version as it has the sections identified and bookmarked, but be sure you ID the correct parts for your saw. It might help to DL your manual as well as the 2009-02 version for reference purposes.)

The armature and harness will be found on the Ignition / Flywheel page (items 7 & 8, respectively), and the switch will be found on the Air Filter / Intake / Carb and Air Purge / On-Off Switch pages, as item 9 (e.g., p/n 504 00 34-01, includes retainer bail).

If you are getting no spark from the plug wire when cranking the engine with the ON/OFF switch in its ON position, the problem must be in one of three places -- the magneto or its mounting, the harness, or the switch. A short between the magneto control terminal and the magneto armature will kill the spark, as will any short between the two wires in the harness. Similarly, an ON/OFF switch that fails to open (internally) will have the same effect as leaving the switch set to its OFF position.

If the engine will not stop when the ON/OFF switch is moved to its OFF position, an open magneto circuit is indicated. This can be due to a broken wire in the harness, a loose or corroded connection of the grounding (control) wire to the armature frame, a break in the magneto primary circuit to the control terminal, a loose or disconnected wire at the ON/OFF switch, or an ON/OFF switch that fails to close (internally).

While broken or shorted harness wires are easily repaired without replacement, any magneto or switch failures will usually require replacement of the failed component.

Jul 21, 2012 | Husqvarna 450 e-series 18" Chain Saw

1 Answer

Have got a joe hunt magneto and i want to put it into my triumph 750 1970 model is there a diagram for this or is there instructions on how to install it

I ran one of those on several 60s-70s Triumphs.....great ignition!

Both plugs fire at the same time so there is no left/right to worry about.

Remove spark plugs and gap .018. Remove timing cover (right hand side of engine) over battery ignition points.
Disconnect and tape (insulate) all battery connected wires. Better yet, unhook battery hot wire from battery terminal.
Hold breaker cam in opposite direction of rotation (advanced position) and rotate engine until the points on #1 cylinder just start to open. Note: Use .0015 feeler gauge.
Remove breaker plate, breaker cam advance mechanism, and dowel pin from internal taper if your model used a dowel pin to position breaker cam and advance mechanism. CAUTION Do Not Rotate Engine. If engine is rotated, reverse rotation until piston is down and the cylinder at least one inch before top center on the compression stroke.
Rotate engine in normal direction of rotation until piston is 5/16 from top center on compression stroke. Install magnetos adaptor plate and adaptor shaft in cam taper. DO NOT TIGHTEN SHAFT. CAUTION 1963 to 1970 Triumph unit construction twins have a different length taper on shaft and internal threads are dissimilar. Suggest checking threads and taper. 1963 to 1970 bolt has BSF 1/4 x 26 threads. 1971 and later bolt had 1/4 x 28 thread. Early shafts are marked with the letter "A". Later shafts are marked with "B".
NOTE: Some applications will require drilling and tapping engine with 1/4 x 20 for better security of magneto mounting adapter. Some customers with severe service report that they heli aced adaptor to cam cover with approximately one inch length bead, top and bottom for security.
Remove Magneto cover. With shaft slightly loose in taper mount Magneto so that points are just starting to open and bolts are approximately in center of slot (for timing adjustment later).
Carefully remove Magneto and tighten center bolt in shaft. Re-install Magneto and time. Install cover and plug wires. Hook up ground wire to a separate kill switch to ground only. DO NOT HOOK ANY BATTERY CURRENT TO MAGNETO.
Point Gap .012 to .015

Aug 02, 2011 | Triumph Bonneville Motorcycles

1 Answer

I have a craftsman riding lawnmower with a kohler 15.5 ohv engine, it will not start, i disconnect the wire on the magneto and it will start but will stall about a minute later, i have cleaned the carb,...

Couple of ideas, if there is a fuel shut off solinoid on the bottom of the carb float bowl, remove it switch the ignition on, the lottle pin in the end should be drawn in, if not, check there is power to it with a multi meter, also if it has a fuel pump up by the rocker box, check this is pumping by removing the hose onto the carb, crank the engine to check fuel flow.

Jul 26, 2011 | Garden

1 Answer

Need the air gap between the ignition coil and the flywheel for an Echo PB-251 leaf blower

All magnetos work best with minimal air gap. Gap it with the thinnest piece of paper/plastic that you can remove from the gap. Spin it, examine flywheel for evidence of rubbing. If it's good, start it and zoom it a couple of times, shut it down and check again.


Feb 05, 2011 | Echo Garden

3 Answers

I start my car but it immediatly shuts off and the theft sys light flashes could this light be the reason?

the ignition swith reads the key chip when key is turned, this is a common problem,the ignition switch will need to be replaced, after replacing the swith reprograming will be needed, to program you will need a battery charger to keep battery from going dead, after installing new switch,turn charger on, turn key to crank then release key leaving ignition on, you will see the dash lights, leave key on for about 15-20 min, until you see theft light go out, if light doesnt go out then repeat process,crank for 2 sec, then leave key on 15-20 mins until security/theft light goes out, hope this helps.

May 09, 2010 | 1997 Pontiac Grand Am

1 Answer

Can you point me to the wiring diagram for the above mower

The flywheel black (negative) and red (positive) wires are the magneto output. Red goes to ignition to charge the battery, and also burn the headlights -- so the red will go to the headlight switch as well, maybe through the ignition.

There should be an in-line fuse on the charging/headlight wire coming from the magneto.

There should be a safety switch under the seat which energizes the fuel cutoff solenoid on the bottom of the carburetor.

There are also interlock switches on blade engage mechanism, and the brake pedal, These prevent engine from starting if brake is not applied or if blades are engaged -- these would control current to the ignition module.

This is not complete, but it'll give you some clues -- good luck -- it's a ton of work.

May 08, 2009 | Mtd Garden

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