This has me stumped. - Page 2

Cub Cadet 123 · #11 04-10-2018, 08:09 PM

Quote:

Originally Posted by darkminion_17

Stand on a wooden piece of wood and see if it does the same.

Ok, Unc......now I'm confused, which doesn't take much....

Cub Cadet 123

darkminion_17 · #12 04-10-2018, 08:31 PM

IIWII and no China wood either.

Billy-O · #13 04-10-2018, 10:11 PM

Some good responses here. I thought of the possibility of a wire shorting near the air cleaner cover, maybe?

J-Mech · #14 04-10-2018, 11:21 PM

Quote:

Originally Posted by darkminion_17

Maybe his hand is creating a better ground for the engine, is your engine properly grounded?
Stand on a wooden piece of wood and see if it does the same.

Maybe I'll just sit this thread out......

DeltaCub · #15 04-10-2018, 11:39 PM

Quote:

Originally Posted by darkminion_17

Maybe his hand is creating a better ground for the engine, is your engine properly grounded?
Stand on a wooden piece of wood and see if it does the same.

Or one can stick their finger in their ear and say "tinga, linga, loo"

jbrewer · #16 04-11-2018, 06:49 AM

Are you using new, solid core ignition wire that is property terminated? While I suspect that resistor wire should work fine too, I'd double check the ignition wire and plug as they're typically the culprit in frying coils.

Ignition cables are much cheaper than coils anyway. Even if the ones on the engine are new, I'd be tempted to replace them. Toss a new plug on there too.

I wouldn't worry too much about the value of the resistance measurements. You're in the right ball park and relatively low value resistance measurements are not particularly accurate with a 2 wire DMM anyway. Your resistance reading sounds fine as does to voltages measured.

This IS a good puzzle!

jbrewer · #17 04-11-2018, 06:50 AM

Quote:

Originally Posted by DeltaCub

Or one can stick their finger in their ear and say "tinga, linga, loo"

If you miss and hold a leaky plug wire, that's not ALL you'll be saying !

flatpickerray · #18 04-11-2018, 07:58 AM

Quote:

Originally Posted by J-Mech

Maybe I'll just sit this thread out......

Why are you sitting this one out? I was hoping you would have the answer to the original question. "How does cutting off the air affect the spark?" Just cranking the engine there is little to no spark, when I block all air going into engine I get normal spark, using a spark tester.

Grounding the engine has nothing to do with it, it's all self contained. You could hang the engine from a tree on a rope and it would run on the mag.

I've been working on this problem for about a year, so yes I've tried everything everyone has mentioned. New plugs, old plugs, wider gap, shorter gap, grounding engine, check kill wire, plug wires, relay, high CCA battery, rebuilt carb., fuel pump, fuel lines, cleaned tank, it's parked in shed with wood floor, etc.,etc,etc.

And George, if you can pull the engine in 30 minutes you're a good man, it would take me that long to gather up the tools and get things arranged to do the job.

Jbrewer, I think your comment is on the wrong post, should be on the 1650 frying coil post.

Oak · #19 04-11-2018, 08:19 AM

I'm with George, less compression. What kind of spark do you get if you pull the plugs? I'm thinking the new ignition module is the issue.

flatpickerray · #20 04-11-2018, 08:37 AM

Quote:

Originally Posted by Oak

I'm with George, less compression. What kind of spark do you get if you pull the plugs? I'm thinking the new ignition module is the issue.

I'll have to get back to you on that, I'm busy this morning but this afternoon I'll pull the plugs and see. I thought the first new coil was bad so they sent me another one, I guess it could be bad too.