1989 20 repower

[jtown561]

I recently purchased a 89 20 footer, yanked every wire out threw it in the trash , recored the gas tank hatch, etc,etc,etc....I was wondering if an 05 150 carb, yamaha would be sufficient for power? does anyone have this motor on one?

[Bushwacker]

A 150 is MORE than enough power and should give you a WOT speed in the mid-40's with a cruise of 25-30 mph, depending on how much gas you want to burn. The VDH hull is much more efficient (less drag) and develops more lift at low speed than a conventional deep V. At speeds over about 40 mph, the nearly flat outer panels which provide low speed lift are almost completely out of the water, so they don't add any extra drag, one of the hull's many subtle but brilliant design features. There is a bit of wedge built into the outer panels for extra low speed lift, but a slight rocker in the inner panels that lets the bow rise for good speed @ WOT!

Moesly designed the 19/20' hull in the mid-60's for the biggest motors of the time, the I-6 Merc/V-4 OMC's which weighed about 260-300 lbs, and were only about 100-110 hp at the powerhead. Many of these boats were sold new with 85 hp motors and ran just fine with them. However, with a beam of only 7'6", these boats DON'T like too much weight on the transom! The mistake most folks make with them is using motors that are too heavy rather than too little power. You need to stay under 400 lbs or you'll have to start using trim tabs, stern lifting props, and fins to get decent low speed planing performance. With a light motor the 20 will plane at about 12 mph, which is important if you intend to run offshore a lot. It's a relatively light hull that starts to go airborne at about 20 kts when seas get up around 3', so it's nice to be able to hang on plane at low speed when the seas kick up!

An 89 would be a Tracker model, which I think is actually longer than 19'8" of the original 60's/70's vintage Moesly/Potter versions. It would be a bit heavier, both because of the extra length and because they probably used plywood in the decks instead of the balsa core used originally.

[otterhound]

In my '89 Tracker the gas tank panel and live well cover were cored with plywood squares which I think I'm going to replace with Nidacore. The rest of the cockpit floor is balsa core which was gone under each of the console and leaning post mounting points.
Rod

[Mikem8560]

I had a 91 150 carbed rude on mine it was plenty here a video with it before I repowered

http://www.youtube.com/watch?v=k4-wu...ature=youtu.be

[seacraftks]

Thanks bush wacker for sharing I have a 20SF 1973 hull and did not know all that