On 26 Aug 2004 16:38:41 GMT, (Greg) wrote:

When I went down from 75 to 60 my top speed changed about 1-2 MPH.

That's interesting. I thought the opposite because of the nature of
the two hulls.
Unless that 1-2
Mph represents a large percentage of total speed.

I went from 23-25 to 22-24 (depending on the load).

Interesting. A 20% drop in horsepower resulted in, for all practical
purposes, the same speed. I assume that the props were similar in
size and pitch?

Just out of curiosity, which was more efficient in terms of GPH?

Later,

Tom

Short Wave Sportfishing wrote in message . ..
On 26 Aug 2004 16:38:41 GMT, (Greg) wrote:

When I went down from 75 to 60 my top speed changed about 1-2 MPH.

That's interesting. I thought the opposite because of the nature of
the two hulls.
Unless that 1-2
Mph represents a large percentage of total speed.

I went from 23-25 to 22-24 (depending on the load).

Interesting. A 20% drop in horsepower resulted in, for all practical
purposes, the same speed. I assume that the props were similar in
size and pitch?

When operating non planning vessels you can throw outragous amounts of
HP at them with little effect in speed

Matt

Just out of curiosity, which was more efficient in terms of GPH?

No comparison in fuel consumption, the 60 EFI is a lot better, particularly at
slower speeds. You really don't buy a 4 stroke if you want to go fast (WOT) and
at 3000-3400 16-17MPH the 60 is a lot better on gas.