Cabin Skiff Motor hp

Designs for inboard or outboard power

Moderator: BruceDow

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Cabin Skiff Motor hp

Postby eric_wwww » Tue Jan 26, 2016 10:29 am

Any thoughts on the minimum horsepower for a cabin skiff (the regular 16' version)? I have an old 2-stroke Suzuki 60hp that was running decent 12 years ago when I took it off another boat and it still turns and appears to have good compression but I like the thought of a new 4-stroke on this new boat when I finish it. I was looking at a new Suzuki 30hp but don't want to get something too small. I plan to use this boat for cruising the Intracoastal here in Florida and I want it to plane off easily but I don't ski or anything so I don't need extra power for that. I just am not familiar with 4-stroke outboards and if the HP ratings compare equally to older 2-strokes. Thanks.

User avatar
Bill Edmundson
Posts: 10320
Joined: Wed Nov 23, 2005 6:45 am
Location: Birmingham, AL, USA
Contact:

Re: Cabin Skiff Motor hp

Postby Bill Edmundson » Tue Jan 26, 2016 12:41 pm

Eric

HP is HP. The old engines were rated at the fly wheel. New engines are rated at the prop. That means that an old 90 HP may be 75 HP now. I haven't looked at HP needs for the Cabin Skiff. I think, I'd go with a little more than a 30 HP. I think 40-45 HP would push it fine.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

User avatar
raymacke
Posts: 729
Joined: Mon Apr 25, 2005 7:07 pm
Location: Marissa, IL
Contact:

Re: Cabin Skiff Motor hp

Postby raymacke » Sun Jan 31, 2016 9:52 pm

When building my Cabin Skiff I had a discussion with Glenn WItt about engine size. He had called out 40hp as the max but he told me as long as the weight was right around 200 pounds it would be OK. I was looking at the 50 HP Honda which for a four stroke is light and fell within the acceptable range. It has worked well for me. At 18' my CS is longer (not recommended) and heavier that most. If you build according to plans I think a 40 HP would be great. A 30 HP might work but I think you would be much happier with the 40.
So Many Rivers,
So Little Time....

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Re: Cabin Skiff Motor hp

Postby eric_wwww » Thu Feb 04, 2016 4:26 pm

Thanks for the suggestions Ray and Bill. I think you're right that the 40 would be a great size motor for my CS (which is being built to the 16' plans size) but I do like the lighter weight of the Suzuki 30 - it's 158 lbs vs. 229 lbs for the Suzuki 40hp. But, the 40hp has nearly twice the cc displacement (950 vs. 490 for the 30hp) so the 40 would be not only more horsepower but maybe operate in a better RPM range.

I'm still going to first try and see if my old 1982 Suzuki 60hp 2-stroke can be serviced and brought back to be a nice running engine because I figure if I can do that for $500 - $1,000 I'll be ahead of the game. I'm trying real hard to get this boat done and in the water by the beginning of summer so I'll report back if I'm successful with the older engine.

Eric

User avatar
raymacke
Posts: 729
Joined: Mon Apr 25, 2005 7:07 pm
Location: Marissa, IL
Contact:

Re: Cabin Skiff Motor hp

Postby raymacke » Thu Feb 04, 2016 5:37 pm

Eric,

Just wondering if you have the motorwell/splashwell installed yet?
So Many Rivers,
So Little Time....

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Re: Cabin Skiff Motor hp

Postby eric_wwww » Thu Feb 04, 2016 8:33 pm

Ray - yes I built that long ago when I started this build (before I took an embarrassing number of years off). I'm guessing you may be thinking of the motorwell narrow-ness if built per the plans? Luckily I noticed that my old 60hp motor steering arm needed extra room so I widened the motorwell and transom cutout to 32 inches. It's been so long since I did that but I bet I saw you or another builder run into that problem so thank you to those that came before me. :)

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Re: Cabin Skiff Motor hp

Postby eric_wwww » Thu Feb 04, 2016 8:45 pm

Here's a photo of it (unfinished as yet). I made it 32" or 34" wide - can't recall at the moment...
Attachments
IMG_20160120_172155669_HDR.jpg

User avatar
raymacke
Posts: 729
Joined: Mon Apr 25, 2005 7:07 pm
Location: Marissa, IL
Contact:

Re: Cabin Skiff Motor hp

Postby raymacke » Thu Feb 04, 2016 9:46 pm

You knew exactly where I was going! Yes, as per plans the well is too narrow for modern cable steering systems. I made it work with the narrower well but it is less than optimal. At 32" or above you will be fine. The build looks really nice.

BTW - Time off is nothing to be ashamed of. It is not a race but rather an incredibly rewarding journey. Enjoy the ride........
So Many Rivers,
So Little Time....

User avatar
hoodman
Posts: 1057
Joined: Thu Nov 10, 2011 8:48 am
Location: Lafayette, IN

Re: Cabin Skiff Motor hp

Postby hoodman » Fri Feb 05, 2016 11:55 am

I'm sure I speak for everybody else when I say that we'd love to see some more pictures of your build. We like to see how the sausage is made.

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Re: Cabin Skiff Motor hp

Postby eric_wwww » Sat Feb 06, 2016 10:38 am

Thanks for the kind words. I'll post more photos after a bit.

Eric

eric_wwww
Posts: 23
Joined: Tue Jan 01, 2008 6:34 pm

Re: Cabin Skiff Motor hp

Postby eric_wwww » Thu Jun 01, 2017 1:47 pm

Wow, I can't believe it's been over a year since I said I would post more photos "after a bit". Since that last one I've flipped the boat over, fiberglassed the hull and painted it, then flipped it back upright and built the cabin. So this is where I'm at today (well actually since these pics were taken last week I have installed mahagony trim around the cabin entrance.) After many years I can finally see a dim light at the end of the tunnel.
Attachments
20170522_172056.jpg
20170522_171802.jpg

User avatar
Bill Edmundson
Posts: 10320
Joined: Wed Nov 23, 2005 6:45 am
Location: Birmingham, AL, USA
Contact:

Re: Cabin Skiff Motor hp

Postby Bill Edmundson » Thu Jun 01, 2017 2:00 pm

Eric

Just keep going! As long as that light at the end of the tunnel isn't the headlight on the train :!: :roll: :wink:

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build


Return to “Power Boats”

Who is online

Users browsing this forum: No registered users and 13 guests