HK wrote:
Short Wave Sportfishing wrote:
On Fri, 17 Aug 2007 12:09:22 -0400, HK wrote:

Got some preliminary performance figures on the new boat:

1000 RPM 4.3 mph .70 gph

4000 RPM 26.2 mph 6.9 gph

4500 RPM 30 mph 8.9 gph


Engine is too young for a sustained wide-open run, but I am guessing
5900 rpm, 40+ mph, and (gulp) 16+ gph.

It's not that I don't believe you - really. Those figures seem a
little suspect.

How much horsepower?

150. Got these and two separate performance reports from Parker that
provide almost identical results. Theirs are a hair, just a hair, less,
because of the way they load their boats for testing, with a full load
of fuel, a full livewell, "gear," and two galoots. Two reports from
Parker because they tried two different props.

If you check the Yamaha performance bulletins, you'll find a 2120SC, a
boat with the came hull as mine, but with a cabin and heavier. It
performs just a bit worse than mine.

I suppose we could have gone with an etec and gotten more noise, more
vibration, more pollution, and less performance. :}



Oh. Forgot. When I bought my 2520XL Parker, they sent me a performance
sheet and when I actually took delivery of the boat, I found that their
numbers were precisely on the money. In fact, they indicated that boat
would just kiss 40 mph at WOT with a 225 and it did.