Twin Yamaha 150's powerful enough?

General boating discussion
BCTony
Posts: 99
Joined: Thu Feb 10, 2011 2:02 am

Twin Yamaha 150's powerful enough?

#1

Post by BCTony » Thu Feb 21, 2013 8:34 pm

Thinking of purchasing a North River Offshore 24' and wondering are twin Yamaha 150's powerful enough? Would one be sufficient get on plane in an emergency?

User avatar
spoiled one
Donator '08 '09 '10
Posts: 1138
Joined: Mon Jan 14, 2008 4:48 pm
Location: Anchorage, Alaska

Re: Twin Yamaha 150's powerful enough?

#2

Post by spoiled one » Thu Feb 21, 2013 9:19 pm

I think that is a perfect match for that boat. Propped correctly I suspect you will be able to plane her on one. They sell the 22 Hewes OP with a 115 up here in AK and it planes. Way underpower IMO, though. Those NR are nice rides. :beer:
Spending my kids inheritance with them, one adventure at a time.

2010 AK Meet & Greet
Image
2012 AK Meet and Greet
Image

AlloyToy
Donator '08 '09 '10
Posts: 2430
Joined: Wed Jan 09, 2008 8:55 am
Location: MA & RI

Re: Twin Yamaha 150's powerful enough?

#3

Post by AlloyToy » Fri Feb 22, 2013 9:16 am

Personally I would ask the manufacturer for some burn info.......you are adding quite a bit of weight for the second motor. You may want to check the gph for the weight of two motors (150's 492 pounds each) vs just going with a single 300 hp (558 pounds) you may be able to even run a 250hp (505 pounds) and achieve the same burn results and save on all the rigging...........if you want the security of a second motor consider a kicker with an aft station just my 2 cents


I looked closely at that boat.....very nice :!: Good luck

paulh
Posts: 27
Joined: Wed Feb 20, 2013 7:07 pm

Re: Twin Yamaha 150's powerful enough?

#4

Post by paulh » Fri Feb 22, 2013 10:51 am

Burn at cruise should be a touch over ~6.5 gph per 150, 13gph combined. Double that for WOT.

The proper way to size power for twins IMHO is to take gross weight hull, engines, fuel, gear, passengers et al in pounds and devide by 20 for total power. Conversley a pair of 150's is suitable for a gross weight of 6000 pounds. Which is to say you can plane 6000# with 150hp.

Twins are definately more expensive to purchase, rig, maintain and burn a bit more fuel. But if you boat in areas where you can't expect a tow and coming in on a kicker is not an option, they are the way to go. Just make sure you size them so that you can get on plane with one engine, or else you have a really big expensive kicker. Also remember that if you'll need to make a long run back on one engine, you'll really need to reprop.

User avatar
goatram
Donator 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
Posts: 1959
Joined: Wed Apr 09, 2008 11:53 pm
Location: Stanwood WA

Re: Twin Yamaha 150's powerful enough?

#5

Post by goatram » Fri Feb 22, 2013 5:25 pm

Blackvelvet aka Ted in town here as a 26' NR OS with twin 150's he likes them and he also has a T9.9 Kicker. A.T. that is the way it is done up in the PNW. Twins on that boat is good and it was designed for it.
John Risser aka goatram
33' RBW with twin 250 Hondas (Aliens)
2015 Ford F350 Dually
Master of R&D aka Ripoff and Duplicate

BCTony
Posts: 99
Joined: Thu Feb 10, 2011 2:02 am

Re: Twin Yamaha 150's powerful enough? Now Twin 200's

#6

Post by BCTony » Sun Mar 10, 2013 10:45 pm

Well in the end to opt for the new Yamaha in-line 200's was only $5,300 more for the analogue version so I have taken that. The 200's weigh only slightly more than the 150's. The digital version of the 200 works out a fair bit $ more for not a lot more as far as I could see and both versions have variable trolling control which the 150 does not and which should be useful.

Post Reply Previous topicNext topic