Hi,
I am looking for information on replacing timing belt on Honda Harmony 216
First, do you
HAVE to replace it? Honda does not specify any service or replacement for the life of the engine, so unless it is damaged, broken, etc. no need to replace it just as routine maintenance.
Here's a basic diagram of what the internals look like:
Not shown is the camshaft, which is driven by the timing belt....the two halves of the block come apart, so the crankshaft can come out and you can fit a new belt. Then, you align a set of marks on the cam pulley to set the timing.
If this is your first time doing this job or working on the internals of the GCV engine, I'd strongly suggest a Honda shop manual to use as a guide:
Honda Power Equipment Shop Manuals on eBay
Honda Power Equipment Shop Manuals on Amazon