need a straight answer

[Woodydel 0]

Stop switch wiring to magnetron. http://image.photoloft.com/opx-bin/OpxFIDISA.dll?src=/PhotoLoft/Asset18/2002/02/04/8932/8932781_0_2588.fpx,0,0,1,1,512,208,FFFFFF

[johnmonkey 4]

Is this the same type of engine as a model 19d that I have on my 1961 simp 700? my main question is would I have to do the same procedure on my engine. Thanks, John H

[Kent 436]

John, As I understand it, you would definitely need to have your flywheel repolarized to use a Magnetron. Kent

[BillC 0]

If you go to www.jackssmallengines.com and look up Briggs and Stratton part #398811, it states "For 7-16HP single cylinder horizontal & vertical engines (Used on most BS engines after code 84, 1984) ..." My understanding is to use this part no. on code 84 and lower (1984 and prior) the flywheel needs to be repolarized.

[johnmonkey 4]

I have read just about every post on this subject but I still have one more question. I had to replace the coil on my 243431 10 HP briggs, the briggs dealer sold me a # 398811 and told me this would replace the coil, points and condenser. I installed it and the tractor did run and seems to spark, however the the only way to stop the motor is to ground out the spark plug. I called around to some other briggs dealers to see if I had the stop wire wired right and he told me there is no way this part can be used on my engine because its a cast iron engine. He told me I have to go back to the original coil with points and condenser. Can anyone help me to make sense of all this ? I really hope I dont have to pull the engine. Thanks, Gene

[SmilinSam 4,244]

I think I recall Dave Christiansen said something about having to re polarize the flywheel or something to use the electronic ignition on a older cast iron engine. He would know more than I would. Sam

[Kent 436]

Try searching for "repolarize" in the keyword search above. There's been several discussions on this, but I can't remember the exact answer -- some will take an electonic ignition without repolarizing the flywheel (after 1981 sometime, I think) and the older ones won't...

[Dutch 4]

The #398811 is a Magnetron armature for 7-16 hp B&S horizontal & vertical L-head single cylinder engines (that's what you have, so it sounds right). I think the flywheel has to be re-polarized ONLY if the Magnetron doesn't work (you ran the engine with the Magnetron, so the flywheel should be okay). The Magnetron should have a "spade" terminal. Did you connect a wire to it? Does the wire "ground" when the ignition is turned off, and "NOT ground" with the key in the run position?

[Woodydel 0]

Solder a wire to the high tension wire at the spark plug and route that wire to the switch. Turn off the switch and the plug is grounded and engine stops. Or go nuts...Woody

[PatRarick 1]

Dutch is correct. If the engine runs, you shouldn't need to repolarize the flywheel. As he said there is a spade terminal on the coil. There should have been a small wire in the box with your coil. That wire needs to be hooked up to the terminal on the tin plate , that your original coil hooked to. On the original coil the wire from here, also went to the points. Now the wire that originally went to the points, should go to your ignition switch to ground out the coil. Pat

[dlcentral 1]

If eng. code is '80 or higher no need to re-polarize.Only for older stuff,,so my Briggs films tell me,,