1920 needing a little trouble shooting

[Alltractoredup 292]

I just picked up a very nice Duetz 1920 with 60" deck and 46" snow blow for cheap. The issue:

Motor runs but there is something electrical for sure. Has the M20 motor. Front lights flicker....and when I pull off one of the plug wires it dies. I put it back on, start it, pull opposite side and dies. Both sides die just as if turning key off.

Question: shouldn't motor continue running even if on cylinder has no spark? Is this some sort of ignition protection?

What am I missing

[Brettw 1,130]

I am not sure of the issue, but I do not believe it has anything to do with any kind of ignition protection. They usually will continue to run on one cylinder, albeit poorly, obviously. You state it kills like you shut the key off? That seems quite odd.

[Ronald Hribar 105]

I am probably wrong again

But thought I read once you need both plug wires hooked up to get spark

And they both spark at same time

Even though one is on compression stroke and the othe on exhaust stroke

[Alltractoredup 292]

Yup, shuts down immediately one a plug wire is pulled. All other opposed cylinder engines stayed running that I would do this procedure to.

[Alltractoredup 292]

[lugnard 73]

In the kohler manual I downloaded for my 1920 with a ch20 it says in the "test for spark" section...Do not crank engine or perform tests with 1 spark plug lead disconnected and not grounded, or permanent system damage may occur.

Not saying any thing about your methods mind you cause I probably would do the same, but might not be good with the electronic ignition and such. Try putting a good spark plug in the plug wire and ground it to the head and see if it will run that way...might be interesting!

Harry

[dhoadley 1,747]

quote:Originally posted by Alltractoredup

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id="quote">

id="quote">Looks more like a plow than a blower^

[Brettw 1,130]

quote:In the kohler manual I downloaded for my 1920 with a ch20 it says in theid="quote">

id="quote">

This may be true for the Commands, but I think this a Magnum? And I have had issues with running in the past and have pulled plug wires to determine the bad egg and the Magnums continued to run with one plug wire pulled. These were Sunstars and one Sovereign.

[Alltractoredup 292]

Well I think I got it, Checked spark plug on one side and it was stripped and slightly cockeyed in cylinder head.....thanks previous owner. I can't complain I only paid $400 for entire package

Snow blower does have that silage plow look...LOL

Previous owner bought all new bearing and never got back to it so I have all parts and new bearings!!

[Marty-MN 0]

You got a good deal any way you look at it

[Alltractoredup 292]

I agree Marty, you actually bought a few of my tractors and attachments a few years back in Red Wing, MN.

[fishnwiz 3,290]

Glad to hear it was nothing major!