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sherwindu sherwindu is offline
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First recorded activity by BoatBanter: Jul 2006
Posts: 187
Default yamaha 15 vs yamaha 9.9



lid wrote:

sherwindu wrote:
It remains to be seen just how
high (not low) a gear ratio they come up with.


You say to-may-to, I say to-mah-to. I'd say 4:1 is lower than 2.92:1.

My Seagull had a whopping 4 to 1ratio.


Yup, they don't make 'em like they used to. But wasn't it a much lower
horsepower engine? It would need all that leverage to push the same
load.


I remember advertising pictures of these larger Seagulls pushing heavily
laden
barges. True, it would take them time to get the vessels moving, but they
had
the torque to do the job. The only problems with the Seagulls were the
mixing
of the gas and oil, and the annoying noise and vibration. They were simple
to fix.
I even rebuilt the lower gear box on one going down the Mississippi, and I'm
not
an experienced mechanic.




No manufacturer has yet come close to that.


Not that I know of either. At least not at 9.9hp or above. Your T9.9
is 2.92:1. That's as low as I've seen currently. Mercury is 2:42:1 and
Honda is 2.33:1.

My Yamaha is about 100 pounds, so 96 pounds is no big deal.


Yamaha spec sheet shows 108. For me, 12lbs might be big enough to tip
the balance, all else being equal.


Actually, I looked up the weight in my 2002 Yamaha catalog and the T9.9
high thrust engine is listed as 99 pounds.



Rick