Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

One guy from MSP area is selling his 15 year old HS621 (the guy from Wayzata MN who hates HomeDepot and GC engines) for $450.  Another one is selling his one year old HS520 for $400 with one year remaining on the warranty.  HS621 is a nice machine but is it really worth more than nearly new HS520?  Replacement parts for HS520 is about 50% of the cost of HS621. What do I recommend for a friend?  I think the HS621 from that guy is simply way too high (if it were as good as aa335 then it is a different story).  HS520 seems like an economical option.  What do you guys think?

aa335 wrote:
A GC with overhead cam will tolerate revs much better than a push rod GX.  However, if the engine is designed to run at 3600 rpm I wouldn't be pushing it much past that unless of course it's a two cycle.  Those things love to rev. 

Another  thing to consider is where the maximum torque is achieved.  On most OPE engines it's around 3000 rpm.  Same size engine on a small motorcycle will probably be a thousand or more rpm higher.

I checked the performance curves for torque and HP.  Max torque tapers off after 2500 RPM.  HP is still increasing after 3600 RPM but not provided.

I guess going higher RPM would be useful if I regear the auger ratio.  Making it spin faster isn't going to do much if it can't be fed enough snow.  Besides, I don't have a need for a single stage snowblower to throw heavy snow more than 25 feet.  As long as it can throw it across a wide car wide driveway consistently, I'm happy.

Thank you for the explanation, Borat. I learned a few things about engines here.

By stablizing I meant keeping the RPM at these high points, not letting it to go lower than, say, 7000RPM.But as you said we would need cooling system first.

Just to get back on the OP's original query, I just picked up my 2nd HS621 yesterday. I was tooling around on CL and saw an older ad for a "good condition" HS621. I called the guy and he told me it was his father's machine and was well taken care of over its lifetime and it looked it in the photos. Long story short, I went and looked at it and sure enough it was in exceptional condition so I bought it for $400.00. I'm going to sell the HS520 and the HS621 I picked up last spring to offset the cost of my new purchase.

I swapped out the new paddles and scrapper bar I just put on the 1st HS621 to the 2nd keeper HS621 so I'm good to go for the winter. The paddles and scrapper bar from the 2nd HS621 were not too bad so I put them on the 1st HS621. #2 is actually older than #1 but it's in much better condition and was well maintained during its lifetime, it even sounds a lot smoother than #1 does.

As far as the prices for HS520's and HS621's goes, those seem to be the going rate on CL around these parts (New England) this season. I only paid $125.00 for the 1st HS621 I bought last spring and $ 250.00 for the HS520 two years ago so I should be well ahead of the game when it's all said and done (hopefully). Once again, I do not like the performance of the HS520 so I have to lean towards the HS621 even though I have not had a chance to put one through its paces yet. I can only imagine that the GX160 OHV on the HS621, which was on my trusty old HS624WA 2 stage, will out perform the GC160 OHC on the HS520. I'd go for the older HS621 if it is in good condition and has been well maintained. JMHO

@FrankMA,

Do you have any idea on how old the second HS621 that you just bought?  Any pictures of the new acquisition?

aa335: The 1st HS621 I bought last spring is S/N # SZAN-1026712, the most recent HS621 purchase is SZAN-1015460. This means my "newsest" HS621 is 11,252 machines older than the first HS621 I purchased last spring. I've got both out on my deck right now and will take pictures of both sometime tomorrow. I just really like the look of the HS621 (sleek and up to the task) and feel the GX160 OHV engine will perform great with this package. The older I get, the more I want to use a lighter, easier to handle machine for the lighter snowfall amounts we typically get in early and late winter when a single stage is better suited to the task at hand. Will post fresh pic's tomorrow providing I can remember how to do so...

Mine is even older with SZAN1006... serial number.

blumonster: You've got one that belongs in the Smithsonian Institute!!! I wish there was a way to determine the build date from the s/n number just so you'd know the age of each machine.

Raining here today so I had to put my toys in the shed this morning but will be taking pic's this weekend as I need to post my old HS621 and HS520 on CL. Temps have been on the very warm side around here (50's & 60's!) so most folks are not thinking snow removal yet. The local CL for Eastern MA/Southern NH is full of decent sounding machines these days. Many are rotating around from week to week as I don't think many are being sold because of the warm temps and nice weather. I've seen a few at decent prices staying on for 2 to 3 weeks at a time. We need a good snow storm to kick things up a notch or two!

FrankMA wrote:

Snowstonian Institute! :D Not the first 1006th machine ever made though. It starts with 1006 and a few more digits after that.Mine is the first 6324th Honda HS621 to be precise.

I am looking forward to seeing your HS621's pictures, FrankMA.Here it is not warm but so far thankfully no snow on the ground.I want to try mine but I am sure there will be many many days with snowstorms here.Just not yet.

I keep looking for some unclear reason at craigslist for Honda snowblowers, both for SS and 5 stage.Prices are not that high here either for the same reason.And they are not selling.I saw a couple of HS80 ads.One of them was being sold for 325 dollars.An old machine but in decent condition.

http://milwaukee.craigslist.org/for/2680581149.html These Yamahas are still in the market.Two of them for $650.One needs carb cleaning, seller says.

FrankMA wrote:
My HS621 S/N is SZAN-10356xx.  It was bought in 1998, but not sure of the production date, maybe 1997. 

I really like the look too.  It is sleek, Honda managed to wrap up the engine completely inside the housing with nothing sticking out and not looking bloated like the Toro 621, or sloppy looking like the B&S variants of the Simplicity / Snapper / Ariens 208cc single stage snowblowers.