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snapper mower:interlock module - how test?

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mitcheroo

unread,
May 28, 2005, 5:26:45 PM5/28/05
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Snapper 1438H Hydro, rear-engine riding mower.

Thing yesterday just quit. Engine turns over, but no spark to the
sparkplug. The three safety switches (seat,PTO,and pedal) check out OK.
Next item up the line is the INTERLOCK MODULE...

All the safety switches tie into the IM. How do I test the IM?

About the size of a chunky book of matches. Tab of a circuit board
poking out plastic sealing filler. This thing have a chip in it? Ya
gotta be kidding me -- an IC for the damn safety switch system? Gimme a
break. $30 to replace. Up yours, Snapper.

Fed up with this mower. "Legendary Snapper"... yeah, right. Something
going wrong with it about every other time we use it, if not every
time...

System fuse is ok. Will check the key switch next. There's also the
ignition coil... how do I check the ignition coil?

Dagnabbit -- all on the frigging holiday weekend too.

Anne Walker

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Sep 11, 2018, 4:44:06 PM9/11/18
to
NEW:
It's 2018 & it appears I have the same or similar problem. I can't push the
brake pedal all the way down to lock it in, which enables the engine to start
or idle. Could it be a blockage, spring, some other failed connection or soes
this also sound like an interlock mod connection

--
for full context, visit https://www.homeownershub.com/maintenance/snapper-mower-interlock-module-how-test-655858-.htm


trader_4

unread,
Sep 11, 2018, 6:23:49 PM9/11/18
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Sounds like a mechanical problem preventing the pedal from going far
enough down.

hub...@ccanoemail.ca

unread,
Sep 11, 2018, 7:09:15 PM9/11/18
to

... original post from 2005 :
>>> Snapper 1438H Hydro, rear-engine riding mower.
>>> Thing yesterday just quit. Engine turns over, but no spark to the sparkplug.
>>> The three safety switches (seat,PTO,and pedal) check out OK. Next item up the
>>> line is the INTERLOCK MODULE...
>>> All the safety switches tie into the IM. How do I test the IM?
>>> About the size of a chunky book of matches. Tab of a circuit board poking out
>>> plastic sealing filler. This thing have a chip in it? Ya gotta be kidding me --
>>> an IC for the damn safety switch system? Gimme a break. $30 to replace. Up
>>> yours, Snapper.
>>> Fed up with this mower. "Legendary Snapper"... yeah, right. Something going
>>> wrong with it about every other time we use it, if not every time...
>>> System fuse is ok. Will check the key switch next. There's also the ignition
>>> coil... how do I check the ignition coil?
>>> Dagnabbit -- all on the frigging holiday weekend too.


... " reply " from 2018 ...
>> NEW:
>> It's 2018 & it appears I have the same or similar problem. I can't push the
>> brake pedal all the way down to lock it in, which enables the engine to start
>> or idle. Could it be a blockage, spring, some other failed connection or soes
>> this also sound like an interlock mod connection
>>
>> --
>> for full context, visit https://www.homeownershub.com/maintenance/snapper-mower-interlock-module-how-test-655858-.htm

>
>Sounds like a mechanical problem preventing the pedal from going far
>enough down.
>

Agree - not at all like the original issue.
Eventually you'll need a real lawn mower ...

http://davisimplementinc.com/johndeerechopper.jpg

John T.


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