Check Out My Boat Thread, What size hull for my engine? in Boating Discussion; Hey guys…..I bought a new tohatsu 90hp oil injected engine 2 years ago and put it on a 20ft valco ...  | | 
Oct-24-2009, 01:52 AM
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#1 | | Registered User
Name: Rich Vessel: 20' westcoaster, Lubina. Location: San Diego Job:$
Posts: 72
| What size hull for my engine?
Hey guys…..I bought a new tohatsu 90hp oil injected engine 2 years ago and put it on a 20ft valco westcoaster. The boat is overpowered and not the ride I had expected….bumpy and wet as hell. I have been thinking about removing it and going with fiberglass but I have no idea how big I can go with the hull. Any thoughts?
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Rich
Last edited by Lubina; Oct-24-2009 at 02:03 AM.
Reason: I go offshore but very restricted
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Oct-24-2009, 02:02 AM
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#2 | | Swivel Tail Ale
Name: Todd Vessel: Boston Whaler 19' LIZARDFISH Location: Point Loma Job:USD School of Law Student Bio: I eat Bonito, Sardines, Mackerel and Barracuda.
Posts: 2,379
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Los Barriles, BCS. Santa Maria 
Last edited by sdfishkiller; Oct-24-2009 at 02:17 AM.
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Oct-24-2009, 08:31 AM
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#3 | | Village idiot
Name: Steve Vessel: 17' Invader, Bottom Line & crew on 26' Blackman - Zarco Location: Santee, Bahia de Los Angeles Job:Yes, still at it
Posts: 3,054
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I run a 90 hp 2-stroke Yamaha on my 17' Invader - it does well but I sometimes want more power.
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Oct-24-2009, 02:58 PM
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#4 | | Registered User
Name: Saba Vessel: Toyota Location: Pacific Job:Sashimi Technician Bio: Tail chaser
Posts: 2
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It all depends on the weight of the boat. You could go a foot or two bigger if you stay with the basic skiff in aluminum, or a stitch-and-glue wood composite like the Tolman. In fiberglass, you'll likely have to drop back down to 16' - 18' range...again, depending on weight.
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Oct-24-2009, 03:56 PM
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#5 | | super cool LA guy
Name: garrett Vessel: 16ft ebbtide under construction Location: Culver city Job:videosmith Bio: i like to pee on my friends' couches. hee hee
Posts: 2,574
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let me know if you wanna get rid of your hull. i would definitely be interested
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i like to pee pee on my friends' couches. hee hee | |
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Oct-24-2009, 04:08 PM
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#6 | | Captain
Name: Richard Age: 47 Vessel: 25' Wellcraft (SOUTHWESTERN) & 16' Mirrocraft Location: Chula Vista Job:Project Superintendent Bio: I am on double secret probation by Kevan
Posts: 1,033
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You could buy another 90 and run twins on a 21'er
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Oct-24-2009, 05:25 PM
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#7 | | Registered User
Name: Rich Vessel: 20' westcoaster, Lubina. Location: San Diego Job:$
Posts: 72
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Originally Posted by Fishbones  You could buy another 90 and run twins on a 21'er | Yeah, i thought about that option...thanks guys.
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Rich
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Oct-24-2009, 05:41 PM
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#8 | | Registered User
Name: Rich Vessel: 20' westcoaster, Lubina. Location: San Diego Job:$
Posts: 72
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Thanks
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Rich
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Oct-24-2009, 06:32 PM
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#9 | | Swivel Tail Ale
Name: Todd Vessel: Boston Whaler 19' LIZARDFISH Location: Point Loma Job:USD School of Law Student Bio: I eat Bonito, Sardines, Mackerel and Barracuda.
Posts: 2,379
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Pangas can run on less hp.
A 23' er with a 75 will do 20 kts.
Designed for less hp. Narrow and Long,very efficient.
I think that panga and the 90 would be sick.
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Los Barriles, BCS. Santa Maria | |
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Oct-24-2009, 06:51 PM
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#10 | | Registered User
Name: Rich Vessel: 20' westcoaster, Lubina. Location: San Diego Job:$
Posts: 72
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Thanks Todd. Keep you posted. I'm still toying with the idea of twins on a bigger hull...but $$$.
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Rich
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Oct-24-2009, 07:36 PM
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#11 | | Registered User
Name: Saba Vessel: Toyota Location: Pacific Job:Sashimi Technician Bio: Tail chaser
Posts: 2
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With planing hulls, it’s all about weight. Weight is by far the most important factor in performance, far outweighing hull design or anything else. Here’s a rule of thumb for calculating horsepower requirements, originally published by the National Boating Trade Association. The ideal is 25 pounds of total boat weight (hull, motor, gear, fuel, bait tank and water, occupants…everything) for every 1 horsepower, and a maximum or 40 pounds for every 1 horsepower. Hope this helps.
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Oct-24-2009, 07:44 PM
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#12 | | Registered User
Name: Greg Vessel: 22' panga, 23' diesel inboard Location: Ventura, CA Job:?
Posts: 37
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I agree with the guys recommending a panga. A 90 is perfect for a 22', I've got a 90 Suzuki on mine and it is fast and very economical.
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