Grand Banks 36

[jacsan]

I am considering to purchase a GB 36 with a single 110hp engine. Is this too under power for this boat?

Thanks,
Jack

 

[Mac2]

Depends. For displacement speeds (7-8 knots), that is a perfect engine. I believe that is a semi-displacement hull, so it is capable of speeds above displacement speeds. I'm guessing it was re-powered.

 

[socalrider]

Could be a great engine for that boat if, like most people, you'd stay at or below 8kts. Another 110hp would probably get you to 10kts at 4x the fuel consumption - hard to see when that would ever be helpful.

Also, a single 110 is likely to make your life much much better when it comes to maintenance versus, say, twin Lehman 120's. We have a CHB41 with twin Lehamn 120's and I'd prefer a single, particularly if it had a bow thruster.

One thing someone is sure to point out: if you are going with a single, you'd better make 100% sure it's maintained and tip top condition.

 

[Cigatoo]

We have a single 135. Maybe we use 1/2 of that HP to cruise at hull speed (Just under 7 knots). A single 110 is plenty for that boat. To get a 36 "over the hump" on to plane would take probably 4 times as much HP.....and fuel. If its a well maintained engine it should be a great fit. (Diesel I am assuming)

 

[JackConnick]

You'll maybe get 7 knots downhill, probably more like 6.5. Pretty old engine.
I have twin Cummins 210 turbos in mine and cruise comfortably at 8.5 knots at 1600 revs.

 

[SteveK]

Is it a 110 Lehman, same block as the 120?

Anyway, ask the seller at what rpm they run the boat and what speed it runs. This info will tell us much more. I had twin 120 in a GB36, it did 12
5 at wot.
Don't expect more than 7 for cruise, maybe 9 at wot.

 

[Choices]

I have a single 135 and cruise at 7-7.5 knots at 1650-1700 rpm with a clean bottom. The bottom is key. Fuel consumption is around 1.5 gallons,/hr. Love it. Friend has same boat with twin Cummins 250, with a clean bottom he can do 15:knots. But has not run it at that speed long enough to calculate fuel burn, maybe 25-30.

We leave early arrive on time, and she just purrs. Ours is a GB36; Europa, and for sale!

 

[Comodave]

It should be fine if you like a 7 knot cruise. I like to cruise faster than that but that is just my preference. Have you actually cruised at 7 knots for several days? If you have and liked it then great. If you haven’t then try it before you buy because you may be like me and not be happy at 7 knots. YMMV…

 

[Cigatoo]

My previous post said hull speed just under 7 knots. Should read just under 8 knots. My error.

 

[High Wire]

6.5-7.0 kts cruise. You can charter one to know if that speed is for you.

 

[Blissboat]

Where do you intend to use the boat? 110 hp is adequate to move the 36' GB in typical conditions, but if you frequently operate where strong currents or winds are a factor, then a bit more power can come in handy. OTOH, with experience you can get used to maneuvering anything and staying out of trouble. As often discussed when this topic comes up in TF forums, the single six-cylinder will make you happy when you have to spend time in the engine compartment. Twins in a GB 36 make for an overcrowded engine space, IMO.

 

[mvweebles]

My 30k lb displacenent hull 36 foot Willard has a 75 HP Perkins 4.236. perfect engine. At the time she was built in 1970, a 6-cylinder Perkins 135 hp was an option. Personally, I think that was overpowered vs 75 HP being underpowered.

But it depends on how fast you want to go. My displacement hull wouldn't do 9-kts even if she had a pair of Pratt & Whitney's bolted to her deck.

Peter