Chainsaw Repair

Hello everybody, i got this old stihl 051/75/76(not sure about the model) about month ago, in general chainsaw is in good shape consider how old it is, compression is good, crank bearings too, but my only problem is that it dont have spark, it have this coil that is really rare to find, coil has been tested and it is working great  when i put it on saw sometimes it have tiny little spark sometimes not and only on cable, when i put sparkplug nothing, now i am not an expert in ignition and electronics so could someone just help me with this old beast

If for some reason it turns out to be something more.

Info in a group thread on CRS group. 

Matt Remchuk added chip to replace triggering module, Stihl 051AVE



K&T (Stens) unit. It will work on basically any single terminal electronic ignition Stihl.
 OEM trigger modules are hard to find and expensive for older saws. Plus they run as good as they ever have with this unit, maybe better.
I use one on the 032 as well.

http://mymowerparts.com/partdetail/1141/1049/14902.php

 Electronic Ignition Module (trigger) For John Deere Kawasaki And Stihl Single Terminal

Replaces the following part numbers
Stihl 1118 400 1001

Replaces Stihl Ignition Trigger Unit 1118-400-1001 AND 1118-400-1004
This is a new cross reference. Customers have told me it works great on many Stihl Models including
009 010 011 012 020 030 031 032 050 051 076 084 BG17 FS200 FS202 SG17 TS510 TS760
NOTES this should replace the trigger on the above models that came out with electronic ign. and also models that came out with points.
When installing on models with points remove all wires going to points and condenser then connect only the small coil wire and kill switch wire to module.
Mount in a cool location with a good ground.
Note will not work on Stihl 031 points model due to timing difference. But it will work on Stihl 031 electronic model.
A customer confirmed that it will also work on the Stihl 032 with the blue condenser he mounted the trigger unit to the ignition coil.

 
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