Export thread

no spark issue, inteck 12.5hp won't start

after adjusting valves and mowing 3 weeks ago,now no spark issue. she won't start. I double checked the valve adjustment an is fine.

checked w/ the el cheapo spark tester fits in-between spark plug wire an spark plug. didn't see an lighting but then it's mid day w/ direct sunlight.

I pulled the spark plug an as usale it's wet w/ fuel. swapped in brand new spark plug still no start.

I may have a spare coil from orginal engine how do I test this coil? thanks for advising

Today’s coils cannot be tested without an expensive piece of equipment. If you are getting no spart through your inline tester, remove the shroud and then remove the kill wire from the coil. If you still have no spark, the experienced tech on this site will tell you to replace the coil.

Is this the Kill wire? Is it part of the seat kill switch?like if the seat kill switch fails again,( I've replaced like 7years ago) this is bypassing the the seat kill switch an engine will run when I'm not sitting on seat? thanks rivets

With that wire disconnected you cannot shutoff the engine, without grounding that terminal or choking the engine. On some engines the fuel solenoid on the carb will starve the engine of fuel and kill it but may take a few seconds in some cases.

Is it part of the seat kill switch?like is revits suggesting dissconnecting this kill wire bc the seat switch mite be faulty an interferring w/ the spark? thanks ilengine

The kill wire I’m referring to is the wire attached to the coil. I made NO mention of the seat kill switch, which until you test the coil kill makes no sense in talking about.

pull the kill wire off and check for spark if no spark you might take the coil off and clean the mounting areas and recheck for spark. if still have no spark replace the ign module.

Removing the coils kill wire provided spark an she cranked up.

How long can I continue w/ this kill wire disconnected? Like is part of the coil failing?

thanks

steves snapper said:

Removing the coils kill wire provided spark an she cranked up.
, bra
How long can I continue w/ this kill wire disconnected? Like is part of the coil failing?

thanks

Click to expand...

Spark with the kill wire disconnected proves the coil is fine, and it is not failing. So the issue is someplace between where it connects to the coil and the wiring in the mower. Check to make sure the kill wire hasn't rubbed through some place on the engine metal. If that is good then the problem is in the mower wiring some place. Key switch, seat switch, pto switch, brake switch. And the wiring harness associated with those components could all be possible causes.

ILENGINE said:

Spark with the kill wire disconnected proves the coil is fine, and it is not failing. So the issue is someplace between where it connects to the coil and the wiring in the mower. Check to make sure the kill wire hasn't rubbed through some place on the engine metal. If that is good then the problem is in the mower wiring some place. Key switch, seat switch, pto switch, brake switch. And the wiring harness associated with those components could all be possible causes.

Click to expand...

ok I'll inspect the wiring an report back thanks ilengine

steves snapper said:

Removing the coils kill wire provided spark an she cranked up.

How long can I continue w/ this kill wire disconnected? Like is part of the coil failing?

thanks

Click to expand...

It will run like normal with the kill wire off, but make sure you have a way to shut the engine down.

I cannot advise bypassing anything safety related. To truly resolve this problem, the key switch and all safety switches need to be checked. The wiring on these mowers is pretty simple.

This is a newer model Snapper than the one I have, so it likely has the little "magic" safety interlock box hidden near the battery area. A seat switch, a brake switch, a deck engage switch and even a deck chute safety switch are fairly normal on these

Auto Doc's said:

It will run like normal with the kill wire off, but make sure you have a way to shut the engine down.

I cannot advise bypassing anything safety related. To truly resolve this problem, the key switch and all safety switches need to be checked. The wiring on these mowers is pretty simple.

This is a newer model Snapper than the one I have, so it likely has the little "magic" safety interlock box hidden near the battery area. A seat switch, a brake switch, a deck engage switch and even a deck chute safety switch are fairly normal on these

Click to expand...

A few years ago I replaced the S terminal wire on key switch (blue wire)replaced w/ a grey run to S on new silinoid

Image

Don’t remember seeing a safety switch next to silinoid.



Before that I replaced I think it was the brake safety switch it was located underneath near the clutch wheel.image

yester

yesterdays mow I just turned the fuel petcock off an ran her dry like I always do. I assume I could rig a switch from the black kill wire to ground for turn off. I'll inspeact the wireing that loose black wire looks a bit scketcky. will report back thanks

steves snapper said:

Removing the coils kill wire provided spark an she cranked up.

How long can I continue w/ this kill wire disconnected? Like is part of the coil failing?

thanks

Click to expand...

It will run like normal with the kill wire off, but make sure you have a way to shut the engine down.

I cannot advise bypassing anything safety related. To truly resolve this problem, the key switch and all safety switches need to be checked. The wiring on these mowers is pretty simple.

This is a newer model Snapper than the one I have, so it likely has the little "magic" safety interlock box hidden near the battery area. A seat switch, a brake switch, a deck engage switch and even a deck chute safety switch are fairly normal on these

Ok now. You have a bad switch somewhere. Seat switch is 2 wires, jump across harness, try to start. if no start jump Brake switch same thing. If no start do same thing to reverse switch. If deck has mulch plug check switch. So if it starts being jumped replace that switch. Not the best way to check harness but easiest way.