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Diesel Engine Question


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#1 OldBuzzard ONLINE  

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Posted September 07, 2012 - 11:54 AM

I just bought Bolens HT20D that has the Wisconsin/Ducati 2-cyl diesel in it.

It runs OK with higher throttle settings, but it definitely isn't running right at idle.

I've compared how this idles as compared to others on youtube, and I know that this is WAY rougher than it should be.

It shakes a jumps like maybe it's only hitting on one cyl.

I'm thinking of running some injector cleaner through it to see it that helps any.

What would you folks recommend?

#2 olcowhand OFFLINE  

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Posted September 07, 2012 - 01:58 PM

Could be a number of things, but at least you can rule out spark related issues! :smilewink: Injector cleaner may do the trick, but it could be the injector tip is worn, or it is popping off too early & not atomizing the fuel. Larger injectors can be adjusted, but I know nothing about those you have.

#3 mjodrey OFFLINE  

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Posted September 07, 2012 - 01:58 PM

Is it running on both cyl the same.Maybe one injector is gummed up or something.


LOL,Daniel,you beat me to it.

Edited by mjodrey, September 07, 2012 - 01:58 PM.


#4 olcowhand OFFLINE  

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Posted September 07, 2012 - 02:00 PM

Video would help.

#5 JDBrian OFFLINE  

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Posted September 07, 2012 - 02:22 PM

Are your motor mounts good. If they are shot then it will emphasis any roughness in the engine. Have you checked the crankcase vent for signs of blowby or blockage and also the air filter. I'd also have a look at the fuel filter and look for any leaks in the fuel system. Good luck sorting it out. That's a really nice tractor. I've yet to see a diesel large frame up this way!

#6 OldBuzzard ONLINE  

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Posted September 07, 2012 - 02:29 PM

I'll try to get some video. Right now there is a T-Storm coming this way.

I just picked up some Lucas injector cleaner. It may not help bit I guess that it can't hurt.

#7 olcowhand OFFLINE  

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Posted September 07, 2012 - 02:33 PM

I'll try to get some video. Right now there is a T-Storm coming this way.

I just picked up some Lucas injector cleaner. It may not help bit I guess that it can't hurt.


No, it can never hurt, and Lucas treatment has helped several of our diesels over the years.

#8 Cvans ONLINE  

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Posted September 07, 2012 - 04:21 PM

Start it up cold and let it idle while holding your hand on both outlets on the exhaust manifold. If they don't warm up at the same rate then you have one cylinder misfiring for some reason. If your blow by is normal than I would say it is fuel related or a valve.

#9 John@Reliable OFFLINE  

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Posted September 07, 2012 - 04:52 PM

Sounds like a cleaner is worth a shot, I swear by Power Service brand run it in 6 trucks.

P.S. I use other Lucas stuff, just never tried the injection cleaner.

#10 GTTinkerer OFFLINE  

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Posted September 07, 2012 - 06:55 PM

Perhaps you could find out which cylinder it is missing on by cracking open the line nut on each injector while the engine is running to see if the engine dies or runs the same. Sorta like pulling the spark plug wire off a multi-cylinder gas engine.

#11 HowardsMF155 OFFLINE  

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Posted September 07, 2012 - 08:22 PM

Perhaps you could find out which cylinder it is missing on by cracking open the line nut on each injector while the engine is running to see if the engine dies or runs the same. Sorta like pulling the spark plug wire off a multi-cylinder gas engine.

That would do the job. And if it is missing, it could be because there is air in the injector line. I've had to bleed a few when we ran a truck or tractor out of fuel.

#12 bhts OFFLINE  

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Posted September 07, 2012 - 08:41 PM

I would check the timing as the timing gear is press on and does not have a key in it. Since you no have one you will find out that the motor will be really hard to find parts for as wisconsin does not support it.




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