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Old 03-29-2008, 01:20 AM   post #1 of 24
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Default Backfires when I turn it off

Hi everyone!

My tractor (SS12) has been working great since last month. I've worked two tilling jobs and have another this weekend if the rain avoids us tomorrow.

And today I mowed my grass for the first time this year. It turns so much better with the ag. tires on the front.

So, I have question. When I turn the tractor off it stops running, then 4-5 seconds later I hear a loud POP out of the exhaust. What is that? Should I be worried about it?
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Old 03-29-2008, 01:26 AM   post #2 of 24
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Lightbulb Re: Backfires when I turn it off

easy fix, bring the RPM down and let it idle for about 20 seconds, then shut it off
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Old 03-29-2008, 08:43 AM   post #3 of 24
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Default Re: Backfires when I turn it off

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easy fix, bring the RPM down and let it idle for about 20 seconds, then shut it off
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Old 03-29-2008, 08:48 AM   post #4 of 24
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Default Re: Backfires when I turn it off

What motor is in it? The old Kohlers are known for this. The problem is that the ing is cut when you shut it off, but the heavy flywheel, and big displacement, still pulls a lot of raw fuel in. Well when that raw fuel hits the REAL hot muffler....POW!!!. As was said, bring the revs down, and let it idel for a little bit. It will allow the muffler to cool, and the motor will make fewer rev's, after the ing is shut off.
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Old 03-29-2008, 09:09 AM   post #5 of 24
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Default Re: Backfires when I turn it off

queen of spades:

on the above info. My Cub Cadet 2518 (Kohler Command twin) used to jolt the heck out of me firing off after shut down. I followed the same advice and it cut it down almost 100%. I would let it idle for a minute or two to let the muffler cool down and allow the engine RPMs to drop. The closest example I can relate it to would be like a NASCAR car when they let off the gas when entering a turn and you see the burst of flame exiting the tailpipe. It is just a dump of raw fuel into a hot exhaust and then detonation.
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Old 03-29-2008, 09:09 AM   post #6 of 24
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Default Re: Backfires when I turn it off

personally, i enjoy the ol backfire... it keeps my dog on his toes



with mine, they said to keep the idle at 1/2 or 2/3's and let it idle for 20 seconds or so.. and that prevents the backfire...

blu appreciates it when i follow those rules..
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Old 03-29-2008, 01:46 PM   post #7 of 24
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Default Re: Backfires when I turn it off

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personally, i enjoy the ol backfire... it keeps my dog on his toes



with mine, they said to keep the idle at 1/2 or 2/3's and let it idle for 20 seconds or so.. and that prevents the backfire...

blu appreciates it when i follow those rules..
nice one there pooorr blu
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Old 03-29-2008, 03:23 PM   post #8 of 24
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Default Re: Backfires when I turn it off

Well mine is probably backfiring because I have two mufflers on it! It's nice and quiet now, which I like.
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Old 03-29-2008, 04:01 PM   post #9 of 24
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Default Re: Backfires when I turn it off

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Well mine is probably backfiring because I have two mufflers on it! It's nice and quiet now, which I like.
What kind did you use ? any photos ?
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Old 03-29-2008, 04:51 PM   post #10 of 24
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Default Re: Backfires when I turn it off

You can kind of see it in this photo:
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Old 03-29-2008, 04:57 PM   post #11 of 24
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Smile Re: Backfires when I turn it off

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Originally Posted by queen of spades View Post
You can kind of see it in this photo:
very nice trailer but I think you need stronger chains to hold your tractor down
Just kidding, ya did fine
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Old 03-29-2008, 06:58 PM   post #12 of 24
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Default Re: Backfires when I turn it off

Ok I see, maybe the muffler runs hotter then before, and like the guys said a little gas.

Make sure you don't catch the muffler on anything. I tore one right out of the block one time. I caught it on a swing set chain while mowing after dringing.
It broke out a piece of the block and threads but I was lucky and able to get back in, but the block was ligthter in weight after that.
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Old 03-29-2008, 08:50 PM   post #13 of 24
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Default Re: Backfires when I turn it off

Quote:
Originally Posted by queen of spades View Post
Hi everyone!

My tractor (SS12) has been working great since last month. I've worked two tilling jobs and have another this weekend if the rain avoids us tomorrow.

And today I mowed my grass for the first time this year. It turns so much better with the ag. tires on the front.

So, I have question. When I turn the tractor off it stops running, then 4-5 seconds later I hear a loud POP out of the exhaust. What is that? Should I be worried about it?
Got a Snapper with the same thing.It kinda helps me stand up straight up after riding for awhile.
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Old 03-29-2008, 09:13 PM   post #14 of 24
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Talking Re: Backfires when I turn it off

The two "women" who live next door to me bought a John Deere rider mower last year,and it does the same thing!--I got quite a laugh the first day I saw them taking turns mowing with it--when they shut it off they left it running at full speed,and I heard -booohhhhhhhhhggggggg-------BOOM!..and a female shriek/scream I'll never forget!..

Evidently they didn't figure out why it does that yet,I hear it backfire just about every time they use it!.--and I saw the John Deere "mobile service" truck in their driveway a week or so ago,I bet they are having it looked at ,to find out why its backfiring..(either that,or replace the starter,they shut it off and re-start it about every 100 feet!..)

I used to be friends with them,and fixed their mowers, and did many repairs on their house and yard for them for years,even went to dinner and concerts with them for some time,thought they were "good neighbors"--then they must have come into some money,they got snooty, and felt I was "below them" or something,didn't want to socialize with me any more--they decided to knock down the old house,and build a brandy new modular home,bought 2 new trucks,and have a shed built--and they no longer need me,so I have nothing to do with them now..they did the same to a relative of theirs who lives a few houses away too,who put them up while the house was being built--they no longer speak to him!..nice people we have living around here..


But I LAUGH at them every time that JD backfires!..
It's more fun than watching the Three Stooges,every time they mow the lawn!..I cant wait till spring!..
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Old 03-29-2008, 09:53 PM   post #15 of 24
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Default Re: Backfires when I turn it off

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Originally Posted by Mr Jimi View Post
very nice trailer but I think you need stronger chains to hold your tractor down
Just kidding, ya did fine
QOS .. get ride of those chains.... your gonna scratch up that nice paint Job !!

Get your self two nice sets of ratchet straps .. much better for the paint job ..
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