Honda HRX needs tachometer adjustment from factory?

KraymericaAugust 21, 2013

Hello All,
I have been looking for a new lawn mower and came down to the Honda HRX vs the Toro Super Recycler. Was leaning towards the Honda HRX and went to a local small engine store to look at their inventory. The salesman told me the Honda mower came underclocked from the factory and they have to hook it up to a tachometer and adjust the engine in order for it to run at optimal RPM's for mulching, cutting, etc.

They sell the HRX with blade brake for $729.99, no discounts or sales. I can get the same model at home depot for $699.99 and also get a 10% military discount there, so about $100 difference between the small local store and big box home depot.

My question is does this make sense or is the salesman just blowing smoke? Is it worth $100 price difference to get the engine tuned up right out of the box?

Thanks for any info you can provide.

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grass1950

Every lawnmower is going to be slightly "underclocked." 29 CFR 1910.243(e)(2)(d)(ix) sets the maximum mower tip blade speed at 19,000 ft per minute. For a 21 inch blade, that works out to be just slightly over 3450 RPM. Every manufacturer is going to set the engine speed somewhere below that (around 3200-3400 RPM). No manufacturer is going to take a chance on violating the code and risk liability. On the other hand, a manufacturer isn't going to set the RPM so low that their machine is not going to perform well--just not good for marketing.
My guess is that as part of "prep and set up" (which any dealer is supposed to do), they may check the RPM for factory spec and adjust to factory/manufacturer spec. if needed (doubt that they come across many/any out of spec as RPM would likely be part of standard factory quality control). If you find the mower not working as intended, most every dealer will adjust the RPM to factory spec if it is out of spec., if needed, as part of service under the warranty Sounds like a bit of sales puffery to me.
Keep in mind, most, not all, dealers try to distinguish themselves from the big box stores by personally standing behind what they sell and giving better and more timely warranty service than you can get from the big boxes. (When I bought my HRX from the big box and returned it due to a fuel leak, they just had me grab another off the shelf--not much of a hassel.) In other words, you spending that extra $100 based on the reputation of the dealer to provide superior service--so check his reputation and decide if it's worth the extra money for your peace of mind.

    Bookmark   August 21, 2013 at 5:44PM
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tomplum

"In other words, you spending that extra $100 based on the reputation of the dealer to provide superior service--so check his reputation and decide if it's worth the extra money for your peace of mind." Good advise. I can tell you that many mowers that I work on- I am the first person that ever puts a tach on them and adjusts the engine speed. That is one sold through agent orange or the local dealer. Commonly a 21" is set at 3150 which allows for ~ 10% governor speed allowance. I get the feeling that these GCV engines really don't want to run at a much higher RPM anyways.

    Bookmark   August 22, 2013 at 1:28AM
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gregga

The HRX I bought from HD runs at 3060 RPM. Factory manual says maximum governed RPM is 2950-3100. I used a Tiny Tach to measure the RPM.

    Bookmark   August 22, 2013 at 6:04AM
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tomplum

There are many that are 2650/ 2850 - it is amazing that they leave a servicing dealer at that speed. GXV's don't like much over 3100- you are correct. I don't adjust them above 3150 no matter what they are on.

    Bookmark   August 25, 2013 at 1:48AM
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