Got handed a ZTR that was 'worked on' with dismantled Ign mods, blower & housing, etc.
I guess it was originally dismantled for leak @ oil pan. ???
When checking valve timing marks later on, I found that RTV rather than Gasket was used to reassemble & camshaft shim missing. (another topic)
After ordering missing bolts from blower & ign modules, found broken bolt in ign mod mount for Cyl 1.
Repaired this issue with installing stud. Verified spark after assembly & setting air gap.
The IGN mods (#20 584 03) were new I'm told.
I noted 2 'sparks' per full 4 strokes (2 flywheel revolutions) one near point of TDC of compression stroke & one other near end of Exhaust stroke.
The motor 'wants to' start but seems to 'kick back'.
Not fully understanding the MDI, I assumed the 'second' spark during the end of exhaust was a non-issue, possibly a 'feature' design, leading me to check internal timing.
I ASSUMED it was normal for the coil to fire each time the magnet on flywheel passed it; now understanding the MDI/Capacitive Discharge better, it might not be proper to fire each time, but possibly the 'build-up' of charge releases instead after second passing. (??)
I need to know if this double-fire is proper or an error by bad modules, cross-talk, or maladjusted air gap.
Proper flywheel & ign mods installed in DSAI to MDI Ignition conversion previously; (according to part numbers).
I'm wondering if an isolation kit (diodes ) between coils is not installed & coils are cross talking; or possibly if previous 'grease monkey' hooked up 12V to mods and caused failures.
I have a wire assembly (844547) for a Briggs with diodes in line; thinking of giving it a try on the kill wires.
Current status is waiting on oil pan gasket & shim to reassemble.
(waiting to be reinstalled in Toro Zmaster G3)
I've inherited a mess, any help would be appreciated.
I guess it was originally dismantled for leak @ oil pan. ???
When checking valve timing marks later on, I found that RTV rather than Gasket was used to reassemble & camshaft shim missing. (another topic)
After ordering missing bolts from blower & ign modules, found broken bolt in ign mod mount for Cyl 1.
Repaired this issue with installing stud. Verified spark after assembly & setting air gap.
The IGN mods (#20 584 03) were new I'm told.
I noted 2 'sparks' per full 4 strokes (2 flywheel revolutions) one near point of TDC of compression stroke & one other near end of Exhaust stroke.
The motor 'wants to' start but seems to 'kick back'.
Not fully understanding the MDI, I assumed the 'second' spark during the end of exhaust was a non-issue, possibly a 'feature' design, leading me to check internal timing.
I ASSUMED it was normal for the coil to fire each time the magnet on flywheel passed it; now understanding the MDI/Capacitive Discharge better, it might not be proper to fire each time, but possibly the 'build-up' of charge releases instead after second passing. (??)
I need to know if this double-fire is proper or an error by bad modules, cross-talk, or maladjusted air gap.
Proper flywheel & ign mods installed in DSAI to MDI Ignition conversion previously; (according to part numbers).
I'm wondering if an isolation kit (diodes ) between coils is not installed & coils are cross talking; or possibly if previous 'grease monkey' hooked up 12V to mods and caused failures.
I have a wire assembly (844547) for a Briggs with diodes in line; thinking of giving it a try on the kill wires.
Current status is waiting on oil pan gasket & shim to reassemble.
(waiting to be reinstalled in Toro Zmaster G3)
I've inherited a mess, any help would be appreciated.
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