there is usually a lever or handle you have to hold to engage the blades.

 

Here's manuals if any assistance

Owner's Manuals | Honda Lawn Mowers HR Series

Download owners manuals for Honda Lawn Mowers HR Series.

powerequipment.honda.com

 

Based on those dimples, it's equipped with a blade brake clutch. are you engaging the blade clutch lever?

 

HR215? One of the best ever built. It's a blade clutch mower, so likely either the cable or clutch lining need replacement, either of which is pretty easy. PTO has zero to do with blade drive - the blade clutch is right off the crank - pto is drive only, and zero "switches" on mine. Mash the yellow button on the blade clutch lever, and push the bail forward, and it should tension and engage the blade clutch.

 

I agree the 1980’s HR series Honda’s are one of the finest lawnmowers ever built I bought one new in 1986 and still have it today and use it regularly. I would check the clutch cable first it’s attached to the black handle with the orange button on top. When these mowers are running properly and look good, as this unit does, they can sell for 150-250 dollars all day long. These are cult classic movers, no longer manufactured, people are constantly looking for good examples to scoop up. Spend some time and effort sorting it out you won’t be disappointed. 😊

 

@Yanmar Ronin: Looks like the server farm is having image problems again...

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They're working on it. 👍

 

yup the blades work when i pushed in that button.
thanks.
sold it for enough beer money and pizza to last quite awhile.
not bad for a freebie.