99 Bayliner Trophy 22 foot top speed

[kliedka]

I have a 99 trophy 22 1/2 foot with the 4.3 mercruiser, top speed is only like 32-33 mph, is that normal?

 

[dingbat]

I have a 99 trophy 22 1/2 foot with the 4.3 mercruiser, top speed is only like 32-33 mph, is that normal?

Sounds about right.
The boat in that configuration is a bit under powered.

My buddy bought his new.
Wanted to race me (different mfg. boat with 225 hp outboard) to the other side, ~6-7 miles.
My top end is @40 mph and I walked away from him at a pretty good clip

 

[cyclops222]

Sounds about right considering that 20 different things can affect speed.

 

[dingbat]

Sounds about right.
The boat in that configuration is a bit under powered.

Having said that, what prop are you running and what is your current WOT?

Could play games with the prop, but it's give and take, speed verse hole shot

 

[Lou C]

Even in my 20' I feel the 4.3 is a bit underpowered, in a 22 I think it'd be more so, are you reaching the maximum WOT RPM? If not that should be investigated because a low WOT RPM leads to bad performance and increased engine strain and wear. If it's a 2bbl carb engine about all you can do is switch to a 4bbl intake and carb, even that's not giving a lot but maybe 25 hp.

 

[airshot]

I have a 99 trophy 22 1/2 foot with the 4.3 mercruiser, top speed is only like 32-33 mph, is that normal?

My 22' Islanders does 34 mph with a 3.0 140hp....you need some work...

 

[kliedka]

Having said that, what prop are you running and what is your current WOT?

Could play games with the prop, but it's give and take, speed verse hole shot

WOT 4800 rpms, not sure what prop

 

[kliedka]

Even in my 20' I feel the 4.3 is a bit underpowered, in a 22 I think it'd be more so, are you reaching the maximum WOT RPM? If not that should be investigated because a low WOT RPM leads to bad performance and increased engine strain and wear. If it's a 2bbl carb engine about all you can do is switch to a 4bbl intake and carb, even that's not giving a lot but maybe 25 hp.

WOT is 4800 rpm’s

 

[Lou C]

Well that might be all you can get from that size engine in a 22’ boat. Mines 20’9”with a pre Vortec 4bbl, WOT is about the same. I weighed my boat & it’s a bit over 4,000 lbs.

 

[dingbat]

My 22' Islanders does 34 mph with a 3.0 140hp....you need some work...

Comparing pumpkins to apples.

A 140hp I/O on my 22’ (280 hp max) would have a tough time even getting it on plane

 

[Lou C]

Isn’t the Islander an alu boat therefore a lot lighter than fiberglass?

 

[airshot]

Isn’t the Islander an alu boat therefore a lot lighter than fiberglass?

Yes it is, but poster is running about twice the hp ! The Islanders weighs around 2300 lbs plus gear. Still sounds slow for a V6 engine....

 

[Lou C]

The 4.3 (Vortec) 2bbl had about 190 hp and the 4bbl had about 220 hp from what I was able to find
the pre Votec had about 175 for the 2bbl and 205 for the 4bbl

 

[Scott Danforth]

1999 bayliner may be water logged. compare the weight to a truck scale

 

[dingbat]

Yes it is, but poster is running about twice the hp ! The Islanders weighs around 2300 lbs plus gear. Still sounds slow for a V6 engine....

Trophy used the 190 Hp , 4.3.

In realty your looking at a 25% increase in HP, a 35% increase in weight and more deadrise to push.

Guessing he's looking at close to #4,100 plus gear

 

[kliedka]

My 22' Islanders does 34 mph with a 3.0 140hp....you need some work...

Is the Islander aluminum? Might be a bit lighter

 

[kliedka]

1999 bayliner may be water logged. compare the weight to a truck scale

How would you go about fixing that? I don’t keep the boat in the water, I trailer it