Twins on a V20

captwalt said:
Getting a bit off subject but. Skools Out how did you like that Manatee you restored? A friend just bought one that needs work and has never been out in it.was wondering how it rode? Thanks Walt
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the best riding boat ever owned and i have alot of boats and had alot.of all i had it's the one i wish i had kept.
 
thanks for the info on the Manatee.it just got a new floor and transom over the holidays. it's his first boat and he can't wait to go out in it. I guess it's getting a new 115 Evinrude etech.
 
Sounds like you have a high flotation style bracket which simply means it is larger and displaces more water when your not on plane. Once you're on plane though, the bracket is out of the water and doing nothing to help you, and this is when the extra weight KILLS your performance. Think of it like a see saw, fat kid on one side skinny kid on the other. What happens? The fat kid will go down and the skinny kid goes sky high. Same thing with a boat. The stern is heavy and goes down, while your bow goes for the sky which results in you having to use alot of negative engine trim and trim tabs to keep it down to get on plane and go level which results in excess drag and a LOSS in performance. Unless your bracket is built into the hull and made structural into the hull to extend the whole boat hull, then the bracket will only amplify the see saw effect of a heavy engine hanging on the stern.

When the V-20 was designed, the biggest outbaords weighed in around 400 pounds or less as all you had was a 200HP flywheel rated outboard back then. And the 235 OMC became the XP(175HP) in 86 when OMC went to propshaft ratings across the board. The 235HP GULPED fuel like no tommorrow, weighed in around 375-385 pounds, and made decent power(around 235 at the flywheel), but it pales in comparison power and weight wise to even an 86 225HP OMC. And like mentioned before, 4 strokes normally have the weight rating on them as just the engine without oils, propeller, and some engine manufacturers were even stripping the alternators off when stating there weights to make them sound lighter. A good example was the first large VERADOS that came out. I believe MERCURY said they weighed in at 580 pounds, but actually weighed in at close to 700 when rigged on a boat. That is about what 2 of the 235's weigh.

If you want a new engine I would limit it to a 175 SUZUKI(the 140 is a better option as it is a bit lighter), the 150 HONDA, or the 150 YAMAHA. As for 2 strokes, I would consider a 175 ETEC(the 200 small block is a good choice, but it is more of a performance oriented engine), or a 150 OPTIMAX(there is a 175 2.5L, but it is a PRO XS performance built engine).
 
A guy at work has a 21ft stamas with a 2009 suzuki 140 on it and is willing to sell it to me for $6000.00. it includes 6yr ext warranty.the boat was Way under powered he needs a 225hp.also will sell me a 15hp suzuki kicker for $1200.00 it to is a 2009 with 6yr warranty. so i guess the HP game has been decided. it's a zuki 140hp..
 
captwalt said:
A guy at work has a 21ft stamas with a 2009 suzuki 140 on it and is willing to sell it to me for $6000.00. it includes 6yr ext warranty.the boat was Way under powered he needs a 225hp.also will sell me a 15hp suzuki kicker for $1200.00 it to is a 2009 with 6yr warranty. so i guess the HP game has been decided. it's a zuki 140hp..
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I don't think you will be disapointed one bit unless you're a speed freak. The 140 is a fuel sipper as I believe RM said he gets close to 5 MPG with his on his V-20 loaded down with people. And these new 4 strokes are so efficient idling that many people aren't adding on kickers anymore unless you want the safety factor.
 
I seen one down my way with twin 75's and it was sweet. Not to heavy in the rear and moved great. Twice the prop in the water more than account for a few horses. He said it would run high 30's and fuel was pretty good. Id love to have a couple of 90hp 3 cylinder yammies on one.
 
Stink, I agree but those 90's still weight 275 lbs each. Is there enough flat transom for twins to be hung there or is a bracket the only way?
 
There was enough flat transom to mount twin 140 Johnsons on my old '73. Luckily no one ever tried to launch it like that (can you say instant SINK?). I bought the boat like this with intention of using one engine and selling the other. Ended up using one for a while, then sold both motors to Skools, had the transom redone, rebuilt the entire trailer and sold the boat/trailer with new transom & no engine to buy my V21.
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I'd love to know how your getting 40 on a v20.. My zuke 140 only gets me to about 43 on the 180.. I sure miss the old Johnson 150 2 stroker, i've had that boat up to 58 when it was newer and low on fuel.
 
Bruce, looks like you got bottom paint on that 180, thats worth quite a few mph, especially if its been recoated a time or two
 
Well thats true, but damn i hate to think its that much drag.. at the resto, the bottom was sandblasted then epoxy coated, theres 1 coat of blue base coat, and then a coat of black.
 
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