Flywheel type ignition tester.

[Mike52]

This gadget can test almost all flywheel type ignitions. In 15 minutes I can test almost any flywheel setup.
Piece of old pipe, bit of old 3mm plate, bit of old shaft and 2 old bearings from my 240WR

Welded the plate as on as shown , machined it flat,machined the pipe to fit the bearings,machined the shaft to fit the bearings and put a husky taper on it,drilled and tapped a hole in the end of the shaft to bolt on flywheels with a different taper, assembled.

Welded a bit of pipe on, cut in half, for the spark plug as shown.

Shown with holes drilled to suit various stators and with spark plug and a cheap chineese coil bolted up.

PE 250 stator bolted on with spacers to raise it up.

PE flywheel fitted. Just spin her by hand and watch the sparks. Good for trying different CDI,s or testing CDI,s/coils quickly. Firing point can be determined using a battery powered strobe light.
Have fitted Husky,Suzuki,Chinese honda setups to this and tested them. Easy

[Freakshow]

Look cool, sure you could spin it up with an old grinder or a cheaper cordless drill too so you can let it run for a while and test it HOT.  seems a lot of elect run but after 5 mins when they heat up start to fall off the spark.  be a good way to bench test that.

well done.

[Hoony]

excellent work. very clever indeed.

[Lozza]

Old sewing machine motors are good for this, all redundant now with a 'test spark' button on a computer . You should also make a separate moveable ground electrode as what you effectively prove now is that it will 'make spark'. What you want to test is how much free air gap the spark will jump that is a indicator of the health of the ignition(simulating cylinder pressure). A drill will only go to about 1500rpm at best vaccum cleaner motors go to 15,000. If you get more rpm (pulleys might help) you can scribe a indexed backing plate to graph the timing.
Your well on your way to 'Mike's Ignition sevices'

[micks]

seen a bloke who had a router (wood work) set up to test inner rotor ignitions didn`t see it run but looked trick.

[head]

Old sewing machine motors are good for this, all redundant now with a 'test spark' button on a computer . You should also make a separate moveable ground electrode as what you effectively prove now is that it will 'make spark'. What you want to test is how much free air gap the spark will jump that is a indicator of the health of the ignition(simulating cylinder pressure). A drill will only go to about 1500rpm at best vaccum cleaner motors go to 15,000. If you get more rpm (pulleys might help) you can scribe a indexed backing plate to graph the timing.
Your well on your way to 'Mike's Ignition sevices'

Lozza, how far should a spark jump on a healthy system? I am testing one now and it will jump about 6-8mm.
Is that OK.

[Lozza]

6mm is about 18,000 V (3000V/mm) which I would say is a reasonably healthy system.

[head]

Thanks for that Lozza