1864 motor question

[jimbob200521]

Originally Posted by J-Mech

Fuel shut-off solenoid probably isn't working right, or the spring is broken or the rubber tip is bad. Pull it out and have a look. I don't recommend shut down above idle.

I finally get to disagree with you on something!!

According to the Kohler manual, shut down is best done at 1/2 to 3/4 throttle. I've experienced the "hard to shut down" problem where it almost seems to backfire but if you shut down at at least 1/2 throttle, it shuts down like a dream. This is what I've been doing and so far, so good

[J-Mech]

You boys go ahead and shut your engines off however you want.

If everything is set like it should be and working properly, it won't diesel, and it won't backfire. It's not an opinion, it's a fact.

[J-Mech]

Originally Posted by jimbob200521

I finally get to disagree with you on something!!

According to the Kohler manual, shut down is best done at 1/2 to 3/4 throttle. I've experienced the "hard to shut down" problem where it almost seems to backfire but if you shut down at at least 1/2 throttle, it shuts down like a dream. This is what I've been doing and so far, so good

Disagreeing with me is fine...... just remember, I've worked on a few more engines than you have.

You may have good luck this way, and the manual may state that, but I'm not shutting my motors down this way. If set right, they will shut off at idle.

**EDIT**

That said:
The main reasons for a motor "dieseling" when shut down are;
*Fuel solenoid not killing the fuel
*Motor is still too hot, needs to idle longer and cool down
#1 reason.... low idle is too fast. Set the low speed lower.

[jimbob200521]

Originally Posted by J-Mech

Disagreeing with me is fine...... just remember, I've worked on a few more engines than you have.

You may have good luck this way, and the manual may state that, but I'm not shutting my motors down this way. If set right, they will shut off at idle.

I am by no means trying to disagree with the experience you have, nor say what you have learned/experienced is wrong. All I'm trying to say is up this point, I haven't heard/read any compelling arguments against following what the manual says. From what I've read on this site, the Kohler manuals are gospel As far as I'm concerned, all is well that ends well

[Rescue11]

Grandpa always said to let the EGT on the 1086 get below 300 before shutting down. Had that drilled in my head at 7 yrs old. Its carried over.... to everything. Idle for a few min and put it to bed calmly. I don't go run a mile and fall asleep right after!

Just wanted to contribute

[J-Mech]

You responded before I changed my post. See my edit on post #13.

[J-Mech]

Originally Posted by Rescue11

Grandpa always said to let the EGT on the 1086 get below 300 before shutting down. Had that drilled in my head at 7 yrs old. Its carried over.... to everything. Idle for a few min and put it to bed calmly. I don't go run a mile and fall asleep right after!

Just wanted to contribute

The EGT thing is VERY true!

I love your analogy, I have used the same one on here more than once!!
An engine doesn't like to be shut off right away after a "hard run" any more than you would run a mile in a dead sprint, and then just lay down at the finish line.

[Shrewcub]

I run mine wide open to cool down with no load, then idle for 10-15 seconds and as I am turning the key off go to WOT. That is how the PO advised me to do it and I have no backfiring if I do it this way. My 1864 halfway on the throttle is still idle so even the supplemented way goes boom.

Sorry the compressed pic is hard to read but the original manual says shutdown from SLOW setting and the supplement says halfway between SLOW and FAST.

[Sam Mac]

Wow! All this just to shut off an engine, I'm impressed. Not trying to stir the pot. Just my observations with back firing or dieseling Commands. I've had some that as long as I let them cool off for a minute or two were just fine at idle, some liked 1/2 throttle, one I had to pull the choke and turn it off at the same time. I don't think that the shut down solenoid instantly shuts off the fuel, reason I say that is if you try disconnecting the kill wire to the mags and then shut it off it will run for a short while before it actually runs out of fuel. I have a neighbor with an MTD that has a CV20 in it, she insists on turning off hot even though I have told her not to do that repeatedly, still can't figure out why the muffler hasn't blown out. See what works for you is my suggestion. If you can get it to behave at idle that's always the best.

[red56turbo]

Originally Posted by jimbob200521

I am by no means trying to disagree with the experience you have, nor say what you have learned/experienced is wrong. All I'm trying to say is up this point, I haven't heard/read any compelling arguments against following what the manual says. From what I've read on this site, the Kohler manuals are gospel As far as I'm concerned, all is well that ends well

Too funny Ryan. Lately everyone's been told to read the manual and now the manual's not right. Well said and good point!

Originally Posted by Sam Mac

Wow! All this just to shut off an engine, I'm impressed. Not trying to stir the pot. Just my observations with back firing or dieseling Commands. I've had some that as long as I let them cool off for a minute or two were just fine at idle, some liked 1/2 throttle, one I had to pull the choke and turn it off at the same time. I don't think that the shut down solenoid instantly shuts off the fuel, reason I say that is if you try disconnecting the kill wire to the mags and then shut it off it will run for a short while before it actually runs out of fuel. I have a neighbor with an MTD that has a CV20 in it, she insists on turning off hot even though I have told her not to do that repeatedly, still can't figure out why the muffler hasn't blown out. See what works for you is my suggestion. If you can get it to behave at idle that's always the best.

Amen brother! I shut my zero turn CC off at idle and she/he never diesels. My smokers do though.
Problem is my zero turn has a 26 horse Kawasaki. Uh oh, a different can of worms...............