Wrong firing order, but running ok... sorta


IHC in the early to mid-fifties.

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Post Thu May 21, 2020 3:07 pm

Wrong firing order, but running ok... sorta

So, some how it looks like my ignition wires are set in this firing order: 154326. Any and everything says it should be 153624. Oddly enough it starts, and runs decent. There is a slight cough every so often. Does that sound possible? That far out I wouldn't think it run at all. Hasn't been driven that way, though. Any thoughts before I get the chance to correct this?

BTW, 1951 L112
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Post Thu May 21, 2020 5:19 pm

Re: Wrong firing order, but running ok... sorta

Firing order should be on the block, I believe. Here is a good page to look at: https://oldihc.wordpress.com/2013/01/13 ... cations-2/ firing order is: 1-5-3-6-2-4 The cough is more than likely a spark off of fuel in exhaust cycle these motors are not real High compression motors, I have seen one run with 60 on 3 cyl and 10 on two cyl and 20 on the other cyl. When you could hand crank it to start a motor, not a lot of high compression. I am sure others will have more to say.

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Post Fri May 22, 2020 12:34 am

Re: Wrong firing order, but running ok... sorta

With two sparks being out of order, it is not possible for that engine to run okay.
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Post Fri May 22, 2020 9:34 am

Re: Wrong firing order, but running ok... sorta

lbesq wrote: ... When you could hand crank it to start a motor, not a lot of high compression. I am sure others will have more to say.


Has anyone tried hand starting on of these? Is it like my farmall tractor... get the crank at 12 o'clock, choke/neutral/ignition and give it a good shove?
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Post Fri May 22, 2020 1:53 pm

Re: Wrong firing order, but running ok... sorta

Your description of how you crank the engine is a guarantee of a broken wrist, if the engine kicks back. You should be starting the crank at 9 o'clock and pulling up on the crank.
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Post Fri May 22, 2020 5:15 pm

Re: Wrong firing order, but running ok... sorta

And don't wrap your thumb around the crank.

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Post Fri May 22, 2020 6:17 pm

Re: Wrong firing order, but running ok... sorta

It's a mystery to me, but it starts and idles smooth. Just the cough/hiccup every so often. Wish I could post or attach the video.
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Post Fri May 22, 2020 7:17 pm

Re: Wrong firing order, but running ok... sorta

why not put it in correct order?
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Post Fri May 22, 2020 7:48 pm

Re: Wrong firing order, but running ok... sorta

bedrockjon wrote:why not put it in correct order?


When I get the ten minutes, that's the plan. :-)
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Post Thu May 28, 2020 8:20 pm

Re: Wrong firing order, but running ok... sorta

Definitely running better now, but still surprised at how well it started and ran at 154326. Now the water pump.
85% of all statistics are made up on the spot.
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