!0 HP yanmar diesel

[swampfox2020]

Hello, i just purchased an old swamp fox 6x6. I don't think its the super swamp fox, it is just a swamp fox. Someone has put in a 352 2 stroke golf cart engine in it. Surprisingly it will absolutely hauls. However, I bought it to make a good offload vehicle for here in the mountains. Many steep grades in the woods around here.

The 352 has got to go. I have a generator here that has a Yanmar L100 on it and I just love that little engine. It will run all day like new money. I would like to get the same engine for the swamp fox. What i am wondering would the 10hp diesel be enough power for the 6x6. I don't want a hot rod at all, I could care less if it only goes 15 mph, but do wonder how it will do going up grades. I know most diesels of lower horsepower will do much more than a gas engine of the same horsepower.

From anyones experience with these, will the 10 hp be enough? What i am trying to do is have a reliable tough outland type vehicle. I know there are more powerful engines, but I the gas engines are kind of a turn off to me, and most diesels over the 10hp yanmar start getting heavy fast. Plus I want something that isn't hard one the chains and sprockets.

Any idea?

[Don]

I had the Chinese knock-off of the little Yanmar in the Li'ltruck for a while and it did pretty much whatever we wanted after I tweaked up the fuel. Only problem was that it black-smoked so much under power that no one would ride behind us. The swamp Fox is quite a bit heavier, so that may make a difference. I had to fit a two-stroke clutch to mine, as it had an odd taper on the crank k.

[Noel Woods]

I put a 25hp Chinese diesel in my Super Swamp Fox. Its a powerhouse with probably too much power. The black smoke issue Don referenced is a downside to these motors. They smoke like a freight train. I think 10hp is adequate if you aren't interested in speed. The small engine will allow plenty of space in the engine bay for air flow and maintenance. I say go for it.

[swampfox2020]

when you say black smoke how bad is it? My generator with the yanmar L100 doesn't smoke at all under full load. I know its a tier 4 diesel as well, so it cant be that bad. Maybe the clones are worse? I want it to be able to CLIMB. From what I can tell the 10 hp yanmar has the same torque as a 14 hp gasser.

[Noel Woods]

Seldom really thick, just the strong smell of sulphur.

https://youtu.be/ZVR_9XcCMvw

[john swenson]

hey noel...i loved the video, never saw it before . that diesel really moves that swamp fox along. how about adding some '' old spice'' after shave to tone down the smell ? thanks , johnboy va.

[swampfox2020]

Noel what is the weight on your engine? I can get a steal on a Datz 2 cylinder air cooled diesel, but these are heavy. it has 27 hp. Really thats more than I want.

[Noel Woods]

The motor is a Winsun 25hp, it weighs about 150lb., air cooled, its a nice package, but really too much power for the machine. I would like to see the results of the 10hp in a swamp fox. Theres a person that put a 10hp single cylinder in a Coot that has some videos out there and it looks impressive. The Coot is heavier than a swamp fox by several hundred pounds.

[swampfox2020]

well i guess it won't be a 10hp YANMAR. Today i bought a kubota z482 2 cylinder diesel. it has 13.3 horsepower. it is a complete runner including radiator and alternator. the flywheel has a 2 groove pulley for belts. trying to figure out how i can install this motor. it runs great, much quieter than yanmar single cylinder. very light about 120 lbs. it is TINY

[ARGOJIM]

You will probably have to build an adapter to bolt onto flywheel with a stub shaft for the clutch.

[Don]

Great little engine! I used one in the BFD for a while, but later swapped it for 3 cylinder D662. The 3 cylinder has more power pulling hills and such with three or four passengers. Jim's right; you'll need to fashion some sort of stub shaft for the clutch.http://

[allwheeldrive]

I'm thinking the black smoke is a side effect of the "China" copy. My Yanmar has never rolled coal. If you watch the videos you'll not see even the tiniest bit of soot, or any sign of exhaust whatsoever.
As far as HP its all a factor of gearing. If a MaxIV can work on 18hp fine, cut the gearing in half and it will have half the top speed and the exact same amount of torque on 9hp. Likewise if you took that 2 stroke 352 and changed your final drive gearing (assuming there is somewhere between the CVT and the drive train chains to swap a sprocket) you could just cut your gearing in half and get twice the torque and half the speed. Sure that little motor will be screaming high RPM and you won't be moving fast, but it will have the same result of a lower RPM engine with more torque.

[swampfox2020]

Great little engine! I used one in the BFD for a while, but later swapped it for 3 cylinder D662. The 3 cylinder has more power pulling hills and such with three or four passengers. Jim's right; you'll need to fashion some sort of stub shaft for the clutch.http://

What type of clutch is that rigged on that kubota? I am not familiar with 6x6s at all. Were you happy with the performance of the 482? I feel like I will be. And where did you get the stub shaft? Will the exmark stub shaft work with it? Surely Kubota makes a shaft for this engine I am sure it is used in applications that require it.

[swampfox2020]

I'm thinking the black smoke is a side effect of the "China" copy. My Yanmar has never rolled coal. If you watch the videos you'll not see even the tiniest bit of soot, or any sign of exhaust whatsoever.
As far as HP its all a factor of gearing. If a MaxIV can work on 18hp fine, cut the gearing in half and it will have half the top speed and the exact same amount of torque on 9hp. Likewise if you took that 2 stroke 352 and changed your final drive gearing (assuming there is somewhere between the CVT and the drive train chains to swap a sprocket) you could just cut your gearing in half and get twice the torque and half the speed. Sure that little motor will be screaming high RPM and you won't be moving fast, but it will have the same result of a lower RPM engine with more torque.

Well I have a yanmar L100 on my generator and it doesn't smoke at all under full load. And it runs like a top. I have started mine well into the teens(farenheight) very easily I just use the compression release. How do you "gear down" these things? I am assuming the sprocket size?

[Don]

What type of clutch is that rigged on that kubota? I am not familiar with 6x6s at all. Were you happy with the performance of the 482? I feel like I will be. And where did you get the stub shaft? Will the exmark stub shaft work with it? Surely Kubota makes a shaft for this engine I am sure it is used in applications that require it.

The 482 was great, but would lug down with three or four adults in the machine.
The clutch is a Salsbury 780; common on a lot of amphibs. Whipper machined the stub shaft for me, so it was perfect. He doesn't frequent the site any more, but any machine shop could probably fashion one for you. Others on this site have made their own with good results as well.