Honda mower won't reverse

Mine did the same thing. There is a spring loaded key on the axle, that "clicks" with the one way gear/sprocket. Replace the gears, springs, keys. I also changed all the bushings and washers as the parts were inexpensive.

ETA: You will need a pair of snap ring pliers. Buy new snap rings. You don't need to open the rear "differential" but you will need to loosen the mount.

Go here to get a parts list/diagram by model.

LINK

Then buy the parts here:


LINK

This is what the reverse "gear" looks like. When rolling backwards the key/spring let axle turn. In the other direction key locks in.

LINK

Not sure what model you have but Honda HHR has a service bulletin (107) on this: Rear wheels locking up when pulling backwards. The problem is associated with rear wheel adjuster bushings which need to be replaced. I’ve had it repaired twice under warranty and it looks like I’m having a problem again. The service techs have stated it’s ridiculous that Honda wasn’t come up with a better solution to fix this problem permanently. LINK

Good number of YouTube videos on the repair.

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Not sure what model you have but Honda HHR has a service bulletin (107) on this:

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Thanks, its a HRR... but I assume I am in for a similar job, which is more than I thought I was getting into with just replacing a couple wheels.

Mine did the same thing. After repeated attempts to correct this, I was able to cut a deal with Honda to upgrade to the model with the fiberglass deck and a five year warranty. No problem with this one. I think that Honda realizes that this issue is a widespread problem. Get past lower management and speak to someone in authority at their headquarters.