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cub cadet is LT1042 w/ kohler SV590 engine 13BX11CG710 isnt missing at any speed but when throttles up, red hot pipe and muffler with sparks out of muffler, compression's OK so dont think broken exhaust valve, gap is right on the plug any help??

Myers Motors said:

cub cadet is LT1042 w/ kohler SV590 engine 13BX11CG710 isnt missing at any speed but when throttles up, red hot pipe and muffler with sparks out of muffler, compression's OK so dont think broken exhaust valve, gap is right on the plug any help??

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Retarded?
How the engine got there I got no idea.

KK

Partially sheared flywheel key throwing the timing off. glowing pipe and muffler isn't totally unusual, but is normally only visible in darker surroundings.

ILENGINE said:

Partially sheared flywheel key throwing the timing off. glowing pipe and muffler isn't totally unusual, but is normally only visible in darker surroundings.

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Thanks.
/wipes brow

I was out on a limb there...not enough info so I took
one of them "edjamakated guesses", like :smile:

KK

Myers Motors said:

cub cadet is LT1042 w/ kohler SV590 engine 13BX11CG710 isnt missing at any speed but when throttles up, red hot pipe and muffler with sparks out of muffler, compression's OK so dont think broken exhaust valve, gap is right on the plug any help??

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I tried to leave it in the original post but said its to long;my neighbor brought home a old used mower an I made a deal to fix it,NOS carb, PTO switch,deck belt battery,new key and 15 other things just to get it started so retarded,guess so. oh the mower yeah so how do you retard a magneto? I'll check the fly wheel and key today and get back to ya afterwards.thanks for the help

Myers Motors said:

I tried to leave it in the original post but said its to long;my neighbor brought home a old used mower an I made a deal to fix it,NOS carb, PTO switch,deck belt battery,new key and 15 other things just to get it started so retarded,guess so. oh the mower yeah so how do you retard a magneto? I'll check the fly wheel and key today and get back to ya afterwards.thanks for the help

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As <ILLENGINE> writes - sheared shaft key.
Well, that's one way, and most likely given what you now post.

And of course I was referring to the engine... neverrrr would I take
such a liberty not having 'met' you before you posted :shocked:

Go well and Good Luck


KK

KrashnKraka said:

As <ILLENGINE> writes - sheared shaft key.
Well, that's one way, and most likely given what you now post.

And of course I was referring to the engine... neverrrr would I take
such a liberty not having 'met' you before you posted :shocked:

Go well and Good Luck


KK

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Just kidding with ya; somthing wasnt firing when I agreed to take on the job,got to it going to be 107 heat index today

Myers Motors said:

Just kidding with ya; somthing wasnt firing when I agreed to take on the job,got to it going to be 107 heat index today

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Oh I "got it" no worries :-D
Those "smilies" the site uses lose something in translation.
ASCII is far more intuitive, for those who know emoticons.

Luck with keeping your neighbour onboard, wishing it works
out for you

KK

KrashnKraka said:

Thanks.
/wipes brow

I was out on a limb there...not enough info so I took
one of them "edjamakated guesses", like :smile:

KK

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Well the keyway and flywheel are inplace, the motors pretty dirty so I'l clean it but it got red hot so fast with throttle up maybe its got to much of a replaced carb it was a walbro KLM model there are 3 different KLM models the one that came off had a plastic throttle linkage and the 1 I put on was all metal. the engine did cool when I throttled it down but I can limit the amount of throttle it can get, or if its sucking air between the carb and motor it could cause a increased throttle when I'm giving it gas. as a kid I'd open my points on my motorcycle at night ya could see flames out of my drag pipes it started a grass fire and burnt my m/c to the ground, thanks for your time

Myers, Can you flash an infra red temp gun on the head when the pipe is glowing red? Some of us are collecting heat data. I once had an Audi that glowed. It was a plugged catalytic converter. Thanks

motoman said:

Myers, Can you flash an infra red temp gun on the head when the pipe is glowing red? Some of us are collecting heat data. I once had an Audi that glowed. It was a plugged catalytic converter. Thanks

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I don't have a infra red temp gun and don't have time to work on the mower today I'm waiting on part delivery today,when I am on it I'll ask around for a temp gauge or something