Yanmar LX4100

[CPortu]

I enjoyed the cold start video... Needless to say- that won't be an issue here for me.... It's in the Mid 60's today and breezy. We're starting a tropical fruit orchard and small organic farm so I doubt we'll need to operate with freezing temps. IF we do, I've got bigger problems than having to use the block heater.

I was needing a mower as well, got a price of 1900 for the Yanmar YRC60 mower (Made by Woods) and that seems pretty crazy to me seeing that I could buy King Kutter with slip clutch delivered and free shipping for about 1500. Thought maybe the dealer was trying to recoup a little on the tractor pricing by jacking up the implements. I thought perhaps I'd beat him up and try to get the mower for 1K (Probably his cost). At worst I'll get the Tractor/Loader, Canopy, Dual Rear remotes and Rear Blade for 23 (about 200 more than the same package with Kioti and LS). I did notice that Kioti increased their rebates on the DK series after Jan 1 so I will revisit my Kioti dealer to see if he can make that deal more compelling. LS dealership is just too far and I'd rather stick with Either Kioti or Yanmar at this point.

 

[Katahdin]

I googled TSO's Mitsubishi engine and dug up my other bore/stroke notes about the other tier 3 engines in the 40hp CUT class. The S4QL is indirect injection, like the Kubota and Kioti engines.

The S4QL has the same bore as the Yanmar 4tnv88 (88mm) but it has a longer stroke (103mm vs 90mm). I don't think we should be surprised at this because the S4QL engine is rated for higher horsepower, and it gets some of that from its larger displacement. In comparison, the Kubota/Kioti engines each have 83mm bores and a stroke of 92.4mm

Let's calculate the Bore Stroke Ratios:
Yanmar .97:1
LS .87:1
Kub/Kioti .89:1

So what does this math mean? Well the Yanmar LX engines stand out because it they have a nearly square bore/stroke ratio, or very close to 1:1. The other engines have longer strokes so they crank the pistons over longer distances, this generally delivers more low-rpm torque but also incur more friction as the piston rings rub against the cylinder walls. The shorter stroke of the Yanmar engine, however, means it can deliver more power strokes per minute, and the direct injection gives it a fuel efficiency edge. Note, this is a very basic assessment, it overlooks a lot of things like camshaft design, rod length, advances in engine design, etc but this is the type of stuff we can ascertain on the spec sheets the tractor salesmen give us, so I hope its a fair assessment!

 

[Katahdin]

Yeah, I hear you about mower prices. I picked up a 6 foot King Kutter for $900, the shear-bolt one without the slip clutch. It was cheap because it had been sitting in the dealer's yard for a couple years and the paint had faded, but I was happy with the price!

Yanmar vs Kioti, truth be told I hemmed and hawed for a long time about that decision too. Good luck with the dealers!

 

[TSO]

I googled TSO's Mitsubishi engine and dug up my other bore/stroke notes about the other tier 3 engines in the 40hp CUT class. The S4QL is indirect injection, like the Kubota and Kioti engines.

The S4QL has the same bore as the Yanmar 4tnv88 (88mm) but it has a longer stroke (103mm vs 90mm). I don't think we should be surprised at this because the S4QL engine is rated for higher horsepower, and it gets some of that from its larger displacement. In comparison, the Kubota/Kioti engines each have 83mm bores and a stroke of 92.4mm

Let's calculate the Bore Stroke Ratios:
Yanmar .97:1
LS .87:1
Kub/Kioti .89:1

So what does this math mean? Well the Yanmar LX engines stand out because it they have a nearly square bore/stroke ratio, or very close to 1:1. The other engines have longer strokes so they crank the pistons over longer distances, this generally delivers more low-rpm torque but also incur more friction as the piston rings rub against the cylinder walls. The shorter stroke of the Yanmar engine, however, means it can deliver more power strokes per minute, and the direct injection gives it a fuel efficiency edge. Note, this is a very basic assessment, it overlooks a lot of things like camshaft design, rod length, advances in engine design, etc but this is the type of stuff we can ascertain on the spec sheets the tractor salesmen give us, so I hope its a fair assessment!

What's your analysis of this engine?

Iseki E4DE
134.1 ci
47.1 HP @ 2600 rpm
Bore/Stroke: 3.82x3.94

 

[TSO]

What's your analysis of this engine?

Iseki E4DE
134.1 ci
47.1 HP @ 2600 rpm
Bore/Stroke: 3.82x3.94

... and I should point out, it's in a Massey 1648, in case you needed that info.

 

[fieldnforest]

CPortu I have an ex450. It's definitely not the same model, but I can tell you I'm very happy with the Yanmar. My wife and I have a hobby farm and it gets used everyday, and I got to say they designed the loader and tractor perfectly. I can lift big round bales with no stability issues. I have used other tractors that are very tippy and unsafe with big round bales. I have 250 hours on it so far and not a hitch for issues. The Lx4100 is an even nicer tractor than mine. So I'd give you a thumbs up on the trigger pull.:thumbsup: