30ft powered cruiser with an extra outboard motor?

[newhaul]

The interesting part of this thread is that we now have 31 posts and the op has not posted anything beyond the originating post.

[Scout 30]

Originally Posted by Cheechako

a 25hp outboard will easily get the cruiser to hull speed. That is defined by the waterline length. Probably about 7 knots. Actually an 8HP will do the same thing. We tested an 8hp hi thrust on a 30 ft aluminum cruiser in a light wind chop and it moved great. Not sure if one of your main engines at idle will burn any more than the 25 hp or not.

This is just BS. I've got a 30' displacement hull trawler with a 43 hp diesel. 8hp will not get my boat anywhere close to hull speed. You seem to think that a planing hull as easily driven through the water as a displacement hull. The opposite would be true. As a planning hull approaches hull speed it is trying to climb over the wave it is creating which requires much more horsepower.

[Lepke]

Any outboard I've seen uses more fuel than an inboard gas and much more than an inboard diesel. Unless it's a fairly new gas outboard, or it's a diesel outboard, it's also unreliable. About the time you need it, it won't run.

[anacapaisland42]

There are 3 conditions necessary to have a long living reliable outboard
1) Only use premium no ethanol gas
2) use premium 2 stroke oil (AMSOIL)
3) Buy a Yamaha
Bill

Originally Posted by Lepke

Any outboard I've seen uses more fuel than an inboard gas and much more than an inboard diesel. Unless it's a fairly new gas outboard, or it's a diesel outboard, it's also unreliable. About the time you need it, it won't run.

[newhaul]

Originally Posted by anacapaisland42

There are 3 conditions necessary to have a long living reliable outboard
1) Only use premium no ethanol gas
2) use premium 2 stroke oil (AMSOIL)
3) Buy a Yamaha
Bill

nope my Honda 4 stroke uses half the gas . My Suzuki 4 stroke same thing .
Best part no dealing with mixing oil and gas.

[anacapaisland42]

My Yamaha is 33 years old, has powered our 32' sailboat thousands of miles in fresh and salt water. Spent 1 winter frozen in, total service..a couple of spark plugs, 2 impellers, ......you see why I'm attached to Yamahas
Bill

Originally Posted by newhaul

nope my Honda 4 stroke uses half the gas . My Suzuki 4 stroke same thing .
Best part no dealing with mixing oil and gas.

[newhaul]

Originally Posted by anacapaisland42

My Yamaha is 33 years old, has powered our 32' sailboat thousands of miles in fresh and salt water. Spent 1 winter frozen in, total service..a couple of spark plugs, 2 impellers, ......you see why I'm attached to Yamahas
Bill

oh I have an old tohatsu 8 horse 2 stroke from the early 70's still running strong.
My 10 horse Honda is similar aged runs great and uses about half the fuel as the tohatsu does.

[Scout 30]

Originally Posted by anacapaisland42

There are 3 conditions necessary to have a long living reliable outboard
1) Only use premium no ethanol gas
2) use premium 2 stroke oil (AMSOIL)
3) Buy a Yamaha
Bill

I couldn't agree more & I put my money where my mouth is. My previous 25hp Honda was nothing but problems. I finally sold it & bought a 25 hp 2 stroke Yamaha & in almost 10 years it's been flawless. The Yamaha burns so little fuel that it's really not an issue.

[Cheechako]

Originally Posted by Scout 30

This is just BS. I've got a 30' displacement hull trawler with a 43 hp diesel. 8hp will not get my boat anywhere close to hull speed. You seem to think that a planing hull as easily driven through the water as a displacement hull. The opposite would be true. As a planning hull approaches hull speed it is trying to climb over the wave it is creating which requires much more horsepower.

Well we will have to disagree then. This was about a V bottomed aluminum boat I was actually testing, it did occur, as it did on the smaller versions in testing. We tested every boat on the water before delivery.. A trawler has far more wetted area than most flat bottomed planing hulls. Try rowing a canoe sometime. Then add a heavy 4 ft keel and let us know how it goes. or try dragging a 2 x 8 thru the water, then tie a bucket to it, it's common sense.. Generally, The "climbing over the wave" part occurs at the very end of hull speed in order to plane a boat.

[Comix Bay]

My son has a 23.5 Bayliner Trophy. Main power is 5.7 Merc in/out, kicker 9.9 Merc. All electric rigged to main helm station. Kicker pushes at plenty over 4 knots when required at a substantial fuel saving. He’s a big fishing fan (nut)!!! There was a 31 Ranger Tug on market last spring in Nanoose Bay that had a 25 Merc mounted on port side as a kicker. Quite a different site