Author Topic: Electronic ignition swap for 090  (Read 59 times)

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Offline oldpro

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Electronic ignition swap for 090
« on: November 07, 2016, 07:01:03 pm »
Stihl did not have an electronic ignition for the 090 when I built my 1987 version hotsaw,and I wanted a far lighter flywheel. We had lots of junked saws and I found that the flywheel from an 048 fit the crank perfectly,it was an electronic ignition too,so all I had to do was make some steel mounting brackets for the ignition module,which I gave generous slots for altering the timing.Of course you need the late style starter to work with the flywheel,not the old Fairbanks-Morse starter.
This has worked very well,the ignition has not failed and the saw still runs strong.

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Offline Cut4fun .

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Re: Electronic ignition swap for 090
« Reply #1 on: November 07, 2016, 08:39:14 pm »
Pics of the conversion?
REDNECK Saw Repair Getter Done

Offline oldpro

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Re: Electronic ignition swap for 090
« Reply #2 on: November 09, 2016, 10:45:21 pm »
Sorry,I had no time for pics during the compelte redesign... :(

Offline oldpro

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Re: Electronic ignition swap for 090
« Reply #3 on: November 23, 2016, 11:09:13 pm »
It was actually the flywheel and ignition from an electronic 042,basically same as newr 048.

Only thing was weak spark at 14,500 with 220 psi,so I reduced comp. to 190 and all was fine.
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