>>There was a mention of the Yamaha YS624T in a Yamaha forum which outperformed the bigger engine Honda 1132.
I’ve used an 8hp Honda track and the first few times I though it was an 11 because of its performance but later found out it was an 8 and amazed. A YS624T will not come very close to a Honda 11 in anything performance wise. The quality of the Yamaha is a tad better.
A guy brought over his YS828T today and we tested together. It’s was an impressive machine but also would not out perform a Honda 11. His 8 beat my 6 in distance by about 5 feet.
>>However, your description of the Yamaha indicates that this is very nicely spec and designed machine, even if it has modest hp (or underrated) for its capability.
My guess is it’s honestly rated which would be tough to compare to US ratings because of fudging and fibbing. (Yesterday I was at Lowes and asked about engines on the MTD’s knowing very well who made them. The sales guy assured me they were Tecumseh engines made in America. I pressed and he assured me that the info was direct from MTD people who came to the store.)
>> Is this YS624T a new model or is it the one discontinued for sale in the US many years ago?
It’s a 1987 model and has not been for sale here for many years. Parts are still available though. I got it from an owner who was the only owner. He garaged it, took care of it well, and it looks to me did the maintenance. It’s tight, paint in great shape, everything works and outperforms larger machines easily. Its got a very well built engine and plenty of power. The key I think partly is the crank is on roller bearings. It may have a cast iron bore but I’m not positive.
>>Did I read this post correctly? The Yamaha L head motor runs at 400 RPM?
No, I fat fingered 4000 RPM. It’s run speed is high and sounds nice. I’ve asked about the impeller and auger speed but have not found out yet what they are. Someone has suggested the impeller runs at 2000 rpm but I don’t think so.
Whatever the impeller and auger speeds are they are obviously higher than US makers speeds. There equal to or higher than a Honda.
>>I think the US, there are regulations on how fast the impeller/auger speeds can be.
Never heard of a limit on this. ?