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If it were me personally, I would opt to add weight to get traction that is easily removed if needed (wheel weights, suit case weights, or a weight box).

It is probably hard to get the suitcase weight kit for a Honda as I suspect they are pretty rare by now, but you can build a weight box or attachment to add other brand weights (John Deere suit case weights for example). On your 4120 a used John Deere or Sabre kit might be a bolt on.

In the summer when mowing you are packing the ground because of the extra weight. Depending on tire size you will perhaps add about a 100 lbs of extra weight to the mower with a liquid weight. Do you really want to be mowing all summer long hauling around an additional 100 lbs for more?

In addition, you can add weight in increments with removable weights, whereas liquid weight in the wheels is a fixed perhaps permanent amount of weight.

Adding weight at the wheel cuts rwhp (rear wheel horsepower) because it is 'unsprung' weight. When adding or removing weight to a vehicle it is always better to add/or remove weight that is suspended rather than to the parts that are included in the drivetrain. When you race a vehicle, ever 10 lbs you reduce from the drivetrain (rearend rotating internal weight or wheels - unsprung weight) increases rwhp or vice versa.

Whether or not the reduction is significant on a vehicle with only 20 HP - don't know - but I think you will be able to feel the difference on the seat.

Adding weight behind the rear wheels (suitcase weights or weight box) will also change the center of gravity transferring weight from the front of the vehicle back to the rear wheels. So the vehicle will steer easier as well especially when the blower or blade is in the up position.

Lastly, I think there will be more wear and tear on the hydrostatic drive with the additional ballast in tires/wheels compared to sprung weight - especially in the summer time. That's why there is a fan blade back there - to keep the transmission cool because of all of the heat generated in the hydrostatic tranmission. So in the summer I would want to remove weight - unsprung weight (wheels weights or wheel balast).

Whether or not the hydrostatic transmission in our Hondas is nearly indestructable like those made by Tuff Torq or Sundstrand that are in John Deere 300/400 series - probably not. There are different models made by Tuff Torq and I suspect the hydrostatic in your 4120 might be made by Tuff Torq made for John Deere for Honda - maybe a K46 or one number series higher.

http://www.mytractorforum.com/showthread.php?t=161413

In short, I would go with removable weight rather than tire balast in the tires.
 

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When I purchased this mower, it came with a blade and weight box. I installed my snowblower instead. The weight box is just a tad too narrow for concrete blocks, so I intend to get some suitcase weights for it. I'll have to add a reinforcement bar along the back top edge of the box where the weights hang, but that won't be an issue. Part of the weight of this box's design is that it rests on the tow plate part of the rear end of the Honda.

http://www.flickr.com/photos/[email protected]/6596272851/in/photostream

http://www.flickr.com/photos/[email protected]/6596276165/in/photostream/

These John Deere weights from Home Depot should fit nicely on my box as well as any home-made bracket.

I'll paint them red or black. Three of them will add about 138lbs. Free shipping or pu local so you won't incur shipping costs for 140 lbs.

http://www.homedepot.com/webapp/wcs...cj=true&srccode=cii_13736960&locStoreNum=2205
 

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Discussion Starter · #9 ·
Thanks. I just got done talking to my dealer, and he suggested to stay with removable weights. If I'll get 60 lbs of sand X 3 (180 lbs) will it be enough? I have the brocket that will hold it... I also have an oppurtunity to buy snowblower for 4120? What you think? Than might be 4518 with 46 deck and snowblower for sale...
 

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Long term - it will be much easier to get parts for the blower for the 4120 since it's made by John Deere.

Sure would be nice if you would post some large pics of your 4120 to share with us folks who don't have one for comparison purposes. All I have seen so far are two small pics of those for sale on Craigslist.

http://www.tractordata.com/lawn-tractors/000/6/7/678-honda-ha4120.html

Since you own both (4120 and 4518) - what's your opinion on build quality between the 4120 (supposedly built by John Deere) and the Honda 4518.

The 4120 appears to be similar to the Sabre (made by John Deere) or GT series John Deere but with a Honda engine in the 4120.

The 4120 deck appears to be a top-line deck built by John Deere for some of the 300 series lawn/garden tractors - workhorses that cost about $10,000 to replace with a similar model today from JD. Parts availability for the deck is good too because it is total John Deere.

Another nice feature on your 4120 is that it has an electric PTO.

In link below, although it is a different tractor (Honda 5518) and bigger blower, the 18 hp seems to handle the snow pretty good, so your 20 hp should easily handle the snow blower you intend to get. Is it a Bercomatic or a Honda blower or John Deere blower?

5518 in action:

http://formulah.com/tractor_videos.php
 

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Discussion Starter · #11 ·
The 4120 appears to be newer model, it is air cooled while the 4518 is water cooled. It seems like 4518 has more power than 4120. The deck appears to be the same. I'll post some pics later. Is there any specifics that you'd like me to take pics off?
 

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The 4120 appears to be newer model, it is air cooled while the 4518 is water cooled. It seems like 4518 has more power than 4120. The deck appears to be the same. I'll post some pics later. Is there any specifics that you'd like me to take pics off?
I was mainly interested in your opinion concerning the quality of parts and finish. For example, except for the decks, none of the four I have show any rust whatsoever anywhere (2 3813's, one 4213, and one 4514).

From what I have read the Honda 4120 deck is very easy to remove - only 4 connect points and pulls out from under the tractor because you can swivel the wheels. I haven't seen any Honda decks with those features.

Same for the snowblower or blade - a John Deere style quick attach to the point where you can swap one brand blower/blade for the other.

IMO the Honda 4120 deck is similar if not identical to the deck on a Deere 265.

John Deere deck.

http://www.ebay.com/itm/john-deere-...053?pt=LH_DefaultDomain_0&hash=item4ab0d46f55

Honda deck.

http://www.boats.net/parts/search/H...MZCJ-6000001/HA4120 CUTTER HOUSING/parts.html
 
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