wisconsin v465d engine shuts off after 5 to 10 minutes

Readytoretire · Jan 28, 2020

Looking for some help, I bought a old stump grinder that has a wisconsin v465d engine. I have replaced the fuel pump, the starter switch and put in a carburetor kit in it before I even started it up. It cranked right up after it got fuel to the carburetor. It will run, grind anywhere from 5 to 10 minutes and then shut off. I can crank it right back up and it might run for another 5 to 10 minutes and shut off, again it will crank right back up. My question is there a temp switch on this engine that may be shutting it down. Where is it and what wires is it hooked to. I can buy a temp gun from Harbor Freight to check to see how hot the engine is getting, but I do not know what that critical temp a kill switch would be set at.. I took off all the gaurds around the engine and blew everything clean because it is a air colled engine before I even tried to start it. The key switch has about 7 wires going to it. If there is a kill temp switch, is it wired to the engine coil as a ground kill. Any info could help as to what is making this happen,. Thanks TC :idea:

Bob Bancroft · Jan 28, 2020

That's overhead valves, correct? I've never worked on one. The old flat heads had a little block under one head bolt, which had a wire hooked to it, as an overheating safety.

Readytoretire · Jan 28, 2020

(quoted from post at 01:44:55 01/29/20) That's overhead valves, correct? I've never worked on one. The old flat heads had a little block under one head bolt, which had a wire hooked to it, as an overheating safety.

Not to sure how this forum works. I am not to sure about how the valves are set up on this 4 cylinder engine. First one I have owned. But any help is good help, where did the wire go to?

Bob Bancroft · Jan 29, 2020

There is confusion here, as there is a "classic view", and a "modern view". It looks like you're using modern. I use classic. You'll get used to it!

I believe the wire from the overheating device went to, either the little terminal on the magneto, if it had one, or to the coil on a battery ignition.

Bob · Jan 29, 2020

(quoted from post at 13:48:55 01/28/20) Looking for some help, I bought a old stump grinder that has a wisconsin v465d engine. I have replaced the fuel pump, the starter switch and put in a carburetor kit in it before I even started it up. It cranked right up after it got fuel to the carburetor. It will run, grind anywhere from 5 to 10 minutes and then shut off. I can crank it right back up and it might run for another 5 to 10 minutes and shut off, again it will crank right back up. My question is there a temp switch on this engine that may be shutting it down. Where is it and what wires is it hooked to. I can buy a temp gun from Harbor Freight to check to see how hot the engine is getting, but I do not know what that critical temp a kill switch would be set at.. I took off all the gaurds around the engine and blew everything clean because it is a air colled engine before I even tried to start it. The key switch has about 7 wires going to it. If there is a kill temp switch, is it wired to the engine coil as a ground kill. Any info could help as to what is making this happen,. Thanks TC :idea:

I wouldn't think it would heat up enough that quickly to close the overheat switch, and when they do heat up and shut down, they don't restart 'til after a considerable cooling off period.

You could have some other spark or gas flow issues.

Attach a neon spark tester at one of the sparkplugs and note if the spark quits when it dies and is coasting to a stop, or whether the spark continues.

That will tell you if it's a spark problem or a gas flow problem.

If it IS a spark issue, the (optional) overheat sensor (Key #36), if present, will be attached at one of the cylinder head studs.

TEMPORARILY disconnect it for testing, and also follow the wire from it to the ignition coils and check for possible bare wire, or a pinched area where it could be shorting.

Post back and let us know what you figure out!

http://pittauto.com/customer/piauel/pdf/Wisconsin/Wisconsin_V460D_V461D_V465D_Repair_WM20250.pdf

Engine manual link

Readytoretire · Jan 29, 2020

(quoted from post at 14:59:02 01/29/20)

(quoted from post at 13:48:55 01/28/20) Looking for some help, I bought a old stump grinder that has a wisconsin v465d engine. I have replaced the fuel pump, the starter switch and put in a carburetor kit in it before I even started it up. It cranked right up after it got fuel to the carburetor. It will run, grind anywhere from 5 to 10 minutes and then shut off. I can crank it right back up and it might run for another 5 to 10 minutes and shut off, again it will crank right back up. My question is there a temp switch on this engine that may be shutting it down. Where is it and what wires is it hooked to. I can buy a temp gun from Harbor Freight to check to see how hot the engine is getting, but I do not know what that critical temp a kill switch would be set at.. I took off all the gaurds around the engine and blew everything clean because it is a air colled engine before I even tried to start it. The key switch has about 7 wires going to it. If there is a kill temp switch, is it wired to the engine coil as a ground kill. Any info could help as to what is making this happen,. Thanks TC :idea:

Click to expand...

I wouldn't think it would heat up enough that quickly to close the overheat switch, and when they do heat up and shut down, they don't restart 'til after a considerable cooling off period.

You could have some other spark or gas flow issues.

Attach a neon spark tester at one of the sparkplugs and note if the spark quits when it dies and is coasting to a stop, or whether the spark continues.

That will tell you if it's a spark problem or a gas flow problem.

If it IS a spark issue, the (optional) overheat sensor (Key #36), if present, will be attached at one of the cylinder head studs.

TEMPORARILY disconnect it for testing, and also follow the wire from it to the ignition coils and check for possible bare wire, or a pinched area where it could be shorting.

Post back and let us know what you figure out!

http://pittauto.com/customer/piauel/pdf/Wisconsin/Wisconsin_V460D_V461D_V465D_Repair_WM20250.pdf

Engine manual link

Thanks for the reply, It is raining this morning but when it dries off some where I can get to it I will check these things. Looks like it is sitting in a low spot with water all around it right now. My bad for parking it there. I found a plug off of another engine Zenith carburetor kit that might fit in the carburetor where the back fire solenoid goes. I will try to run it without the solenoid to see if maybe it is bad or loosing power thus shutting off the gas to the engine. Thanks for the print and the info. I too did not think that the temp safety switch would shut it down that fast, but then as old as it is, maybe it is going bad also, I will disconect it and see if it still happens. It is a sweat running engine without any smoking or problems starting right up so I will not give up on it.TC

Tramway Guy · Jan 30, 2020

The other thing it could be is vapor lock. Make sure the
exhaust muffler is specifically for the V465D. The wrong
muffler can cause too much back pressure and make it
overheat.

Fuel, condenser, or coil would be more likely.

Readytoretire · Jan 30, 2020

(quoted from post at 19:55:53 01/30/20) The other thing it could be is vapor lock. Make sure the
exhaust muffler is specifically for the V465D. The wrong
muffler can cause too much back pressure and make it
overheat.

Fuel, condenser, or coil would be more likely.

Thanks for the reply, this afternoon I got out there and removed the backfire shut off solenoid. I added a spark plug tester between the distribtor and one plug wire, like Bob had suggested. Again it fired right up, ran for about 7 minutes, then shut down, the spark plug tester stopped working as it shut down. Again it started right back up, it took me about 3 seconds to get to the key switch to restart. Oil pressure was running close to 60 PSI each time it shutsoff. After about 5 more minutes of run time it shut down again. Again the spark pulg tester was lit up showing spark while running but just as it shuts down the spark went away. I started it back up about 4 more times and each time it started right back up and ran for about 5 minutes, I noticed each time the spark went away that the cutter head for the stump grinder was in about the same location of its swing. It got dark on me and it is going to rain most of the day tomorrow. So mabe this week end I will work on taking all the gaurds off of the motor and check for a bad wire from the temp switch and oil shutdown switch. I will also see if I can find a coil and a distributor tune up kit with condenser for it. Thanks to everyone for your input. TC

Readytoretire · Feb 1, 2020

(quoted from post at 01:57:48 01/31/20)

(quoted from post at 19:55:53 01/30/20) The other thing it could be is vapor lock. Make sure the
exhaust muffler is specifically for the V465D. The wrong
muffler can cause too much back pressure and make it
overheat.

Fuel, condenser, or coil would be more likely.

Click to expand...

Thanks for the reply, this afternoon I got out there and removed the backfire shut off solenoid. I added a spark plug tester between the distributor and one plug wire, like Bob had suggested. Again it fired right up, ran for about 7 minutes, then shut down, the spark plug tester stopped working as it shut down. Again it started right back up, it took me about 3 seconds to get to the key switch to restart. Oil pressure was running close to 60 PSI each time it shutsoff. After about 5 more minutes of run time it shut down again. Again the spark pulg tester was lit up showing spark while running but just as it shuts down the spark went away. I started it back up about 4 more times and each time it started right back up and ran for about 5 minutes, I noticed each time the spark went away that the cutter head for the stump grinder was in about the same location of its swing. It got dark on me and it is going to rain most of the day tomorrow. So mabe this week end I will work on taking all the gaurds off of the motor and check for a bad wire from the temp switch and oil shutdown switch. I will also see if I can find a coil and a distributor tune up kit with condenser for it. Thanks to everyone for your input. TC

2/1/2020 OK I am now considering this problem solved. Thanks for all the replies. I will now do what soo many people that ask for help on these forums forget to do in the end, that leaves a lots of us wondering what they did to get their problem fixed. This morning I took two of the three wires going to the negative coil terminal. The only wire that I left connected was the one that went to the distributor ground. The two that I removed I did not take time out to trace beneath the engine schroud because it was cold and wet outside.They may go to the temp safety switch or oil safety switch. I ran the stump grinder for 45 minutes without it shutting down. After it gets warm outside I will trace the 2 wires down an connect one at a time to find out which one was shutting the motor down, but for now I have to wait until I have another stump to grind. So Thanks to everone that read this post and helped out. TC

wisconsin v465d engine shuts off after 5 to 10 minutes

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