Horse Power

[stripminer]

Im pulling 34 MPH with a fairly WOT but she cruises real nice at about 30 with my 89 Yammi 130. 140 should be plenty but I would think about a 150, nice all around engine for the v20.

[bigshrimpin]

If you want to go offshore . . . twin 140's carb OMC engines and 60 gallons of fuel won't take you very far.

Also anything above 40mph in the v20 seems too fast to me.

just like everyone else said already . . . . Trade/ebay them both and put your money towards a newer more efficent engine 150 + hp and 15hp kicker.

[Blue_Runner]

I agree with all of your responses. My intent when I purchased the boat was to sell one motor and go back to the single setup with the other.

First I'm going to get the compression checked out on both engines. Next, I'm going to get rid of one of these motors and try the other one out as a single setup. If that proves to be too little hp, I'll sell that motor and buy something in the 150 - 200 range.

That brings me to my next unanswered question that I asked a good ways up in this post:

In order to hang the 25" shaft motor on this 20" transom, will I need a jack plate? I saw one that looked as if they had taken a 25" and mounted it high on the transom rather than using a jack plate - can that be done?

Thanks,
BR

[bigshrimpin]

25 inches on a 20inch will need a jack plate or an OB bracket. The cavitation plate on the outboard needs to be level with the bottom of the hull.

[Pipe_Dream]

My V-20 had a 155 Evinrude that on its best day pushed the boat to maybe 37-38 mph, with no load and an absolutely clean bottom (and a tail wind ;)). I replaced it with a Yamaha HPDI 200 hp that took me to just under 50 mph in nothing flat. My 155 was a great, miserly engine: I never burned more than 7 gph. But add several people and/or a few months worth of bottom slime and forget it. So it really depends on what you want to do with it, what loads you will carry, and whether the bottom stays clean!

[Mac_Attack]

Welcome on board! I have a 1990 V20 Sport powered by a !990 Force 150, actual hp rating would be more like 135HP. Carrying four adults,3/4 tank of gas and fishing equipment I'll do 26 Mph @ 4000 Rpm. If I had to replace the Force today and I had the money I'd opt for a 150HP four stroker, for about half the cost and more of a reality for me I'd buy a 150HP two stroker. I also have a 1985 9.8 Merc kicker. It's my safety valve and I troll with it. Good Luck! Bill Mc ;D

[Airslot]

One thing not covered yet is that if you have a 20" transom, you would want 15" legs on the twins. Those 25" shafts mounted off centerline would run way deep in the water. My guess is that one of those 140's would make for a very adequate fishing boat. I've got a 150 merc on mine and it cruises at 26kts at 4k burning 6.7 gph. Thats right about 3.8 mpg in ideal conditions. If I'm easy on the throttle I can run around 3.2 mpg all the time. The other point I'd comment on is that if the boat looks decent, I'd try a good compound/wax job before I jumped into painting. Look into getting the floor gelcoated, its harder than paint and will last much longer. I bet you could get a splatter finish done real reasonable. Good luck, they are great fishing boats.

Airslot

Second thoughts:

Given the overall age of the hull, and the fact that it had a shot transom that needed to be repaired, and that even IF repaired correctly has still sufferred flexing and fatigue of the original glass during the time prior to the repair as the transom was rotting, and the fact that you really don't know if the rot extended into the stringers ...
I would not put more than a single 150 (with a 9.9 kicker) on this hull. I feel that in most cases a 150 is the best single hp motor for a v20, anyway. The 140 is a crummy short lived motor because they are trying to pull 140 hp out of a 4 cylinder block. Those motors with the 25 inch legs were taken off an offshore runner and given their age - one or both are on the way out. I would sell them and buy a 150 and a 9.9 kicker.

[reelapeelin]

Hey guys...no scuppers on a '77...

BR, your transom looks just like my '74...I don't think you need a jack plate, just a 20" shafted motor... just hung a 150 Honda w/20" shaft and it's a perfect setup...jackplate's just gonna add cost and weight and probably not much if any performance...I think your twins will sell beter if you keep them together since they're counter rotating...there's a repower on the board w/a 140, but it's a new one(rated at the prop)...I just don't think you're gonna be happy with one of those 140s ::)

[Blue_Runner]

Thanks for the insight guys...

Reelapeelin, I agree I probably won't be elated with a single 140hp, BUT for 2500 bucks happiness is relative :)

I've never owned a boat that would do more than 30mph, so I think this will satisfy me for a year or two. I want to be able to striper fish out of Oregon Inlet, so if at least one of these motors checks out and I can get a good 9.9 kicker I think it will serve the purpose.

My father-in-law owns a machine shop and can make me a stainless steel "jack plate" for next to nothing. Of course it won't be adjustible, but it doesn't need to be.

Seakindly, yesterday I hooked up some temporary power to each motor and both turned over good. I'm going to haul it down the road and get the compression checked.

Airslot, what is a splatter job? Also, I am a gelcoat idiot, so tell me this - will gelcoat hide a crack in the fiberglass? What about the splatter job (or is that the same thing?)?

I have so many questions.

BR