Question about having enough engine power for 01 Voyager 248

[herodotus805]

Hi i was wondering if dual yamaha 130s is enough engine power for a 2001 Voyager 248. I am thinking about possibly purchasing one of these.

I plan on using this boat around the Channel Islands and in the foul weather that that area brings. I want to make sure i have enough power to get home with decent speed if i have a few passengers weighing her down. Any help and advice would be appreciated. ALso what do you all think of this model Grady? Do you think she'll handle the rough conditions? Thanks. Cheers.

 

[gradyfish22]

Not sure what the speeds are, but it will be very reliable. A buddy in my marina has one and loves it. I would prefer duals over a single, especially where you fish and the seas and storms come up quickly. I have fished a few 248's with singles, and they have enough power, but I'm a fan of twins, more power and more maneuverability, I could never go back to a single. If you contact Grady customer service, they can likely get you sea trial data for that boat and power option. You should have a top end above 40mph, not sure of exact speed though. Also, if you plan to fish more then 3 guys, having twins will be better to get the boat on plane and going with a heavier load.

The 248 has an avg sized beam for that size boat, narrower then that will let you run faster, but cut down on space and not run as well in nasty stuff. More beam will allow for a better ride, but in most cases the use of more HP, and will be more tender in a beam sea. The 248 has a good beam to length ratio and will have a decent ride, but it is only a 24' boat. I've had my 22' Grady and my 26' Grady in seas worse then I would like to endure, so the boats can handle it, but often you will not wish to. I would suggest sea trialling it on a less then perfect day to see what the ride is like.

 

[Jhopman]

I had that same boat with a single 250. If I had my choice I would max it out with twin 150's. I felt that my boat had to grunt a little to get on plane with the 250 if I was going fishing with 3 or 4 people and the normal load for a days fishing. It wasn't a huge issue and playing with the tabs always helps but more power is more better :lol: Good luck.

 

[herodotus805]

Oops made a mistake twin 115 hp yamahas not 130s

Oops made a mistake twin 115 hp yamahas not 130s. bit of a difference....i am a bit concerned hearing you thought it was underpowered with 250hp since the boat im looking at would have 230 hp. I would like to have the ability to put 6 adults in and still the power to get home from the Channel islands in some of the roughest conditions in the world. if you had trouble getting onto a plan with 3-4 im worried about what it would be like with 6 people and 20hp less..
Anyone have an opinion on this?

 

[wahoo33417]

Re: Oops made a mistake twin 115 hp yamahas not 130s

Oops made a mistake twin 115 hp yamahas not 130s. bit of a difference....i am a bit concerned hearing you thought it was underpowered with 250hp since the boat im looking at would have 230 hp. I would like to have the ability to put 6 adults in and still the power to get home from the Channel islands in some of the roughest conditions in the world. if you had trouble getting onto a plan with 3-4 im worried about what it would be like with 6 people and 20hp less..
Anyone have an opinion on this?

Yamaha still has some old data from a 247 (same hull, center console version) with 115 two-strokes. I'll try to insert the link here:

http://www.yamaha-motor.com/outboard/pr ... s=outboard

Yamaha's numbers with two people, only 50 gallons of gas and flat calm are:

RPM MPH GPH MPG Db
1000 4.9 0.9 5.44 63
2000 7.7 3.2 2.41 74
3000 9.7 6.9 1.41 80
4000 26.9 8.3 3.24 86
5000 35.0 12.1 2.90 89
6000 44.6 21.9 2.04 91

My concern is that 3000 rpm reading. Looks like it struggles a bit to come up on plane. Here's grady's numbers from a 257 (similar hull but with running bottom extended through eurotransom) with an F250:

RPM MPH GPH MPG
1000 5.0 1.6 3.13
1500 6.7 2.2 3.12
2000 8.0 3.2 2.54
2500 9.1 4.2 2.18
3000 14.0 5.7 2.48
3500 19.5 6.8 2.89
4000 27.4 9.1 3.01
4500 31.9 11.9 2.69
5000 35.3 14.1 2.50
5500 39.1 17.1 2.28
6000 42.7 20.9 2.04

And then with twin F150s:

RPM MPH GPH MPG
2000 7.5 3.5 2.1
2500 10.1 5.4 1.9
3000 18.3 8.1 2.3
3500 25.3 10.0 2.5
4000 30.4 13.4 2.3
4500 34.9 15.5 2.3
5000 39.0 18.6 2.1
5500 43.0 23.6 1.8
6000 47.6 31.3 1.5

For me, there are too many better option out there to go with the 115s.

Rob

 

[plymouthgrady]

power

T 115's will not be enough power for that boat. I would recommend T150's for your rig. You have to consider the weight of the boat and the amount of water that needs to be displaced to get the boat to plane. While 115's on the surface will consume less fuel (fiction) the engines will be working considerably harder to attain the same performance. I have a 228 w/ single Yami 250 SWSII. Plenty of power for that boat. Because of the power to weight ratio, have you considered a pair of E-TEC's? (absulutely awesome engines.)

 

[plymouthgrady]

power

T 115's will not be enough power for that boat. I would recommend T150's for your rig. You have to consider the weight of the boat and the amount of water that needs to be displaced to get the boat to plane. While 115's on the surface will consume less fuel (fiction) the engines will be working considerably harder to attain the same performance. I have a 228 w/ single Yami 250 SWSII. Plenty of power for that boat. Because of the power to weight ratio, have you considered a pair of E-TEC's? (absulutely awesome engines.)

 

[Hobie]

Personally, I would stay away from Twin's. Until recently you had no choice but to go to twins in order to get the proper Hp for these boats, but now you can get large HP in single engines.

I would buy a 300 Hp Etec. That would be plenty of power for a 24 voyager.

You will save money with a single engine vs. twin's. Your only buying 1 engine vs 2, less fuel consumption, and 1/2 the maintenance.

 

[Grog]

After having twins, I would never want to go to a single again. Much more manuverable and a back-up.