I just rebuilt my boat, it's a 1992 Sea Ray 200 bow rider, and by now we are making her first rides on the river.
The problem I have is that I expected that boat to be faster. I completely replaced wood structure with composites and currently still doesn't have interior trims and seats/cushions other than the captains and admirals.
Today we made a good testing session and those are the numbers:
25mph @3050rpm.
38mph WOT@4700rpm
At 4700rpm the engine seems to cut ignition intermittently as it had some rev limiter, but I thought those where the max sustainable revs as per manufacturer.
The boat hadn't any drivetrain when I bought it, so I rebuilt and installed a Volvo 4.3GX carbureted (205hp v6) and modified it's harness to work with my mercruiser boat. I also installed a rebuilt Alpha one drive. I confirmed yesterday that it's gear reduction it's 1.84:1. 18.4 engine turns for 10 at the prop.
This morning marked the prop hub and engine coupler for a slip test and this night the marks where still aligned.
I almost forgot, the propeller is a plain mercruiser alum. in perfect shape. 14x21p (by reference).
The fact is that I was waiting for something between 40 and 50mph when I rebuilt this boat for lightness. Aiming at the 50's.
The dry weight as per manufacturer it's 2,500lbs (but I assure that it's lighter) and the tests where made with two persons aboard and half tank. Almost full and three people I got the same results four days ago.
It's possible that the rev meter it's toast, and that would explain the engine cutting, but would leave me in worse numbers. I bought it 2nd hand, but it seemed ok.
Are those numbers the max. I should expect from that hull? It's the design?
The problem I have is that I expected that boat to be faster. I completely replaced wood structure with composites and currently still doesn't have interior trims and seats/cushions other than the captains and admirals.
Today we made a good testing session and those are the numbers:
25mph @3050rpm.
38mph WOT@4700rpm
At 4700rpm the engine seems to cut ignition intermittently as it had some rev limiter, but I thought those where the max sustainable revs as per manufacturer.
The boat hadn't any drivetrain when I bought it, so I rebuilt and installed a Volvo 4.3GX carbureted (205hp v6) and modified it's harness to work with my mercruiser boat. I also installed a rebuilt Alpha one drive. I confirmed yesterday that it's gear reduction it's 1.84:1. 18.4 engine turns for 10 at the prop.
This morning marked the prop hub and engine coupler for a slip test and this night the marks where still aligned.
I almost forgot, the propeller is a plain mercruiser alum. in perfect shape. 14x21p (by reference).
The fact is that I was waiting for something between 40 and 50mph when I rebuilt this boat for lightness. Aiming at the 50's.
The dry weight as per manufacturer it's 2,500lbs (but I assure that it's lighter) and the tests where made with two persons aboard and half tank. Almost full and three people I got the same results four days ago.
It's possible that the rev meter it's toast, and that would explain the engine cutting, but would leave me in worse numbers. I bought it 2nd hand, but it seemed ok.
Are those numbers the max. I should expect from that hull? It's the design?