We put a new 90 eTec on the '71 20CC and it was amazing with 13-¾" x 15 s/s prop. Handles both heavy loads and 37 mph WOT.

The '67 19 Bowrider came with a 90 eTc with a 13-¾" x 13 s/s prop. Killer hole shot and tubing with several on board, but over-revs to 5600 at only 31 MPH. Will go with the 15" in the Spring.

I don't see the point in adding any more weight or HP for these hulls unless you have a speed fetish, death wish or money to burn. The fact that they push so much data to a NMEA 2000 device is awesome, particularly fuel flow.

Tohatsu's 4 strokes are allegedly (according to my 'hatsu dealer) re-badged Honda motors.

Ocuyler,
You are right. I run a 13-3/4" x 14" Power Tech on my E-tec 90 bolted to a saw-zalled Bowrider. 3500 rpms = 18.9 Knots with 3 divers, 7 tanks, 150# of coolers and ice, and dive gear. 76 miles round trip - 18 gallons. If you go any faster than 24 MPH on the way home it blows the Elixer out of your Solo Cup! What's the hurry and what are they think'in? Why don't they just R-E-L-A-X.

Hey, I know that dock!!! It's where big snook live and crazy CSC folks go for a good time!! :)

Heard they hide shine there.

Big snook, 'shine and crazy csc folks, huh? sounds like a great place...

[QUOTE=Terry England;What's the hurry and what are they think'in? Why don't they just R-E-L-A-X.[/QUOTE]

I understand some of yall old farts like it slow and there is nothing wrong with that, hey one day I might even want a slow bote, but sum guys like to go fast! Gas prices dropping, im ready to boost up the fuel pressure on my efi and fatten the fuel curve and get there. I may be different if I lived in the sunny state of FL where I could catch sails with in sight of land but here a run to the 100 fathom line is a haul. 60 miles out just to the color break, you spend half the day getting there and back. Now putting around the backwater is different but making those runs out its nice to have a 60 mph+ bote. Maybe one day when I am an ol retired fart and move down to south Fl I can do sum of that slow boating - Relaxing yall r talkin about...

A Potter 20 run with a 90hp motor? Sure, No problem! Light weight and low plane speed is king. In the ruff conditions its all ya need! But on those snotty days when the seas are kicking up, passing those guys with contenders, fountains, and SeaVees with an old wore out 1968 model hull.... Priceless

"I understand some of yall old farts like it slow"

Old farts?? I resemble that remark and proud of it! Heck, I never thought I would make it this far anyway, so to me this is bonus time! :)

after 65 it's all Mileage :o

Mpp
 

Donny, I think the confusion is that Friz is measuring "Preformance" in Miles Per Hour, and we measure it in Pounds per Gallon. We've been out there working all day like Confederate Sharp Shooters and not Hot Rod'in around in the SeaCraft! You can't read no bottom machine at 60 MPH, not even Kenny's.
I guess what we just got here is the full "Band Width" of SeaCraft users on this site and what is important to some just don't mean squat to others - it's too funny!
Sometimes what we got here is "Failure to Communicate", Boss.

What I'm talking about in terms of Performance is Pounds Per Gallon

I think that pic says it all.

As the young bull says to the old one...

"Let run down there and f*#@ one of them cows!"

And the old bull says...

"Why don't we walk down there and f*#@ them all."

Bull:

https://www.youtube.com/watch?v=0Gmw6j6eCCY

.

There's a saying in the dive community here, goes something like this:
"Slow is smooth, smooth is fast"

Think these old Bulls must be onto something. Or is it they just don't like loosing the elixir out of them there solo cups.....eh

Sneaky 'Ol Bastards
 

Beastly, I think you'er on to somethin'. I been studying both that dang Conner Davis and Kmoose for quite so time now. They are both really old and sneaky. They are real "easy" in the water and they try not to git anything stirred up down there. They act more like a Sea Turtle than a Bull Shark on the reef. Sometimes they are hunkered down next to a rock and they set there real quiet like waiting for one of them big 'ol curious groupers to come to them. Ka-ching! They's like Turkey Hunters, just sett'in there real quiet like. I notice the new divers swim around like they own the reef and scare everything off. I'm tell'in ya' them two 'ol guys is real sneaky, but real productive.
If you decide to come div'in with us swing by Frizz's, pick him up, clean the tar off his feet and ease toward Cedar Key, in the Panhandle. We'll get Mel to drive us out to one of Kenny's hot spots. Ol' One Spoke "Cattle Egret" Dave might want to go too. They know how to run a "load test" on the cleaning table.

Maybe I could tag along and extract some of that wisdom out of yall ol guys and learn something new...

So, you guys are saying that a 90 eTec on a 19 or 20 is like an old bull. Smart, slow and steady. All you need is the right prop...

GPP - Gallons per Pound
 

They do just fine and they are real easy on fuel. If you are running way off shore to get your 2 groupers, 5 hogfish and 10 Mango snappers each, what the heck do you want to burn 50 gallons of gas for if you can burn 16?
I'm getting just about the same preformance results you are experiancing with your boat. Of course we ain't going to beat Donald Campbell with those rigs, but it works for me and the cost of fuel ain't much to worry about.

Father Frank started this thread. He's a fan of a light 90hp on a 20 footer. I am too.

http://www.classicseacraft.com/commu...ad.php?t=22546

Terry, I was just reading through this entire thread yesterday and got to page five and seen your sawzawd bowrider. Couldnt stop thinking about it. Came back here this morning and screenshot it. I think I read somewhere that you don't think its as pretty as most of the boats on here... its my new favorite. I think the splash guard, flat wheel position on the console, and the old sea craft script on the stern makes it. And the performance from the 90 ETEC is pretty sweet too. Is there a thread where I can read more about what you did to it?

I was asking my girl about what she thought of some of the seacrafts on craigslist and she basically said, "why do you like all these old boats?" So I let her see yours and I said, "because they can look like this." And she said, "oooooh, I like that one!"

Ill be free diving in homosassa when gags open up. Hope to get good performance in pounds per gallon like that too.

Tight lines.
Ben

Way to go Benjamin!! Now you have went and increased the size of Terry's head, I can here the swelling of pride all the way from lower Tampa Bay. However I must admit his old clunker is cooler than my old clunker. :)

Whaaaat!
 

Ben, You don't want to look too close at that thing. It's got rust streaks running down the transom, a non-skid dash and the electronics box is an old seat back. It's rough. A 1967 is so old it doesn't even have the little reverse on the bow edge that the fancy "cutt'in edge" Potter boats like Don V has. It's a dang SeaCraft Panga, stripped down to the bare essentials but it does everything I need it to do and I don't have to fuss with it much. In the Design World the term is "Form Follows Function". I don't have a thread but there is a album on my member page with some more pictures of the old dawg.
Let's go scouting before July 1 so we know where to point when the season opens. I understand the red tide is still causing havoc in the panhandle area - if it "pushes" south it's going to run the Gags ahead of it and kill everything else. Last summer we caught them bunched up on the Meisner Crane and it was "shoot out at the OK corral" - we got our 6 and were pointed east by 10:30 to snag some hogs in 25'. Keep yout fingers, toes and eyes crossed that it leaves us alone this year.
I keep inviting Don V., Skiblet, Trader Ter, G FS, Denny, Snookerd , and No Bones to come on and go Scalloping or Diving up there with Kmoose and I but they are dead beats always polishing their bow rails or something equally as important, the weenies!

Hey Terry,

I think the Moesly Flats Panga is a whole new category here that may gain traction.

I'm just putting the 19 back together. I noticed the spray rails on yours. I did notice that she was a wet ride when I tested her last fall. Can you suggest a size, length and method of attaching? Thanks!

Spray rails
 

Otto, I sit way in the back so if it is blowing 15, I get a lot of salt water in my Celebratory Red Solo cup on the way home. To prevent salt water intrusion and dilution of said spirts I "stuck" a couple of 8' spray rails on her. Since The Marshtackie is a work boat here is the I did them -
1) Slit and brake a 5" wide piece of 26 ga. metal to 80 degrees
2) cut one leg of the angle at 4" spaces to the bend point
3) screw the uncut leg of the sheet metal to the hull with a few screws at the chine with the cut tabs radiating out from the hull.
4) lay up a couple layers of cloth maybe 3/16" or so thick then when it sets pull everything off the boat and pop the fiberglass off the sheetmetal form. (I trim a lot of fiberglass with a good set of right or left handed tin snips - if it isn't too thick)
5) The strips should hold the profile of the hull but will have some waves where the cuts were in the sheetmetal.
6) straighten everything up with a grinder (yuck) and lay up a few more layers of glass on each side of the now "hull profiled" spray rails.
7) Tape off and grind the gel coat off the hull where the rails will attach and stick them on with some bonding epoxy and some temporary screws though the rails and into the hull.
8) When everthing sets, pull the screws, fill the screw holes and the little gap on the bottom side where the spray rail and hull meet.
9) Gel coat or paint the new rails to match your hull.
I thought possibly something would start to seam crack or work loose someday but it's been a few years and I have no sign of anything opening up.
Otto, they are a little rough when you look at them up close, but so is the boat AND the Captain - so everything kind of matches! The best deal is the dang White Merlot ain't watered down on the way home.

That's just minor cosmetics in my opinion.. Its still a sweet looking boat that catches fish. That's all that matters. I grew up fishing off a cobbled together 17 mako with my dad that makes yours look like the Queen Mary. It was the rat rod of boats.

Guys I hope you don't throw me off this board because I have a 20' Hydra Sport. I've removed the liner and lightened it as much possible. It looks very similar to Terrys boat, It's wide open. I was struggling with which motor to use and after finding this thread I think my choice has been narrowed down. I don't know the weight, but it's much lighter now than when I got it. I know Evinrude makes a 90 E tec for a pontoon which has a different gear ratio than the ones you are using but not sure if it comes with a 25" shaft. I'm really glad I found this thread as I would have never thought a 90 would power a 20' boat. Thanks for all that contributed to this thread and I look forward to more discussions.

Polishing weenie.

I have a 23 Hydrasports so I am an undocumented alien along with you (I have a SC hull picked out but have not begun work yet). The reason for putting the 90 on the Seacraft is that the boats were designed in the late 60's when outboards were no more than 300#. The SC trim angle, especially when adding a bracket, is affected by motor weight more than some other hulls might be. Your boat may not have the same weight limitations that the SC has because its a newer boat that is made for heavier motors, I really don't know for sure. I would guess that your HS 20 would work alright with a 90 but it's just a guess. I personally would not be willing to spend a whole bunch of money on a guess.
The ETEC V4's are probably more in line with what your hull was designed to use. There is also at least one advantage to the V4 models; the ability to use I Command gauges. Sweet gauges! There is also a new Mercury 2.1L 115 4-Stroke that is lighter than the V4 ETEC and looks pretty impressive so far (probably cheaper than the 90 ETEC too).
Good luck with whatever you decide and keep us posted (just post in Spanish so no one knows its really a Hydrasports, they'll never figure it out).

My hull is a 1980. It's called a Duralight hull. It's not kevlar but the documentation mentions lighter weight construction with duralight. Not sure what it means but the previous owner ran an old 115 Suzuki on it. I've taken a lot of weight out of it. The boat was a cuddy model, all of that has been removed. I want to weigh it and then I can decide what to do. It's a modified V hull.

Power to the People!!!
 

Berts80,
Here is what I know from first hand experiance. The E-tec 90 triples have a very flat touque curve and pull like a John Deere through the power range. They are the only Evinrude that is horsepower rated at 5,000 rpm's, because at 5500 they make 102 HP. They wouldn't get a big enough seperation between the 75 and the 115 unless they slowed it down to only make 90 hp. My 2006 is a 20" 2 to 1 gear motor. The 25" are 2.25 to 1 and the pontoon series is 2.36 to1, I believe.
I also have a pair of e-tec 115's on a 25 Bertram Hardtop Moppie. The 115's are a little more "Pipey" they are a little flat in the torque curve until you twist them to 4,150, then they "launch". They have adjustable expansion chambers in them and they change the back pressure or somethin', but it is like a 125CC motocross when they "come up on the pipe". This past weekend I ran down to Anna Maria (Snookerd and Conner's back yard) and raided the Hogfish and Magrove Snapper sites. Four divers, 9 tanks, 150 qt fish cooler, food cooler and dive shit - 104 miles round trip - 41 gallons. I'm about 7,000#'s loaded that way. Spooled up to 5500 "Team 115 E-Tec" hurl that slug loaded like that along at 34 mph.
The real issue is what are you going to use the boat for, and what is the intended loading on a normal trip? If you are not river racing and just plodding along offshore 20-25 mph is all you need. The old 20 SeaCrafts were made to function with the Mark 78, 75 hp Merc's in the 60's. The VDH hulls worked well without too much power. I don't know too much about Hydrosports except the 27's used to fall over on their sides alot and you would trim, trim, trim and then they would fall over on their other side. The SeaCrafts pretty much stay upright without trim tabs, unless you got someone like Kmoose or I wallowing around like a couple of walruses on board.
Buy something light, keep the weight forward, call Ken at Prop Gods for a wheel and go use the dang boat. Put a Seacraft decal on it and the Bayliner gang at the ramp will be impressed! They wouldn't know the difference. You only got so many sunsets left here - enjoy the trip.

That quote made my day...

I'm going to use the boat on lakes mostly, maybe a trip to the coast one or twice a year. It will be a light load, 2 people at the most, only fishing. I will have a 30 gallon shad tank that I can move to keep the boat balanced. I removed a 120 gallon fuel tank and replaced it with a 27 gallon tank. It is positioned all the way forward in the compartment the 120 gallon tank was in. Don't do much running at all, drop the trolling motor and fish.

I think you'll be just fine with that set up. I think you will be in the 35MPH range with a 90 and the 42 MPH range with the 115 with the right wheel. Everybody makes pretty good motors in that power range. Find a stable, reliable, local marina that will support your product and pick a color you like and bolt one on.

Remember fresh water is less dense than salt water so your boat will ride approximately 7/16" lower in the fresh water than in salt. The prop blades load slightly less by approxiamtely .00018 Kn., than in salt water, so ventilation/cavitation is marginally enhanced. These are the things only Gillie knows that answer to. You'll have to "go to the mountain" for those answers - Not Napal, the other one that's falling down - California!

Circle back with a report when you can

"The prop blades load slightly less by approxiamtely .00018 Kn., than in salt water, so ventilation/cavitation is marginally enhanced"

Terry, whatever in the hell that means.....stop it!!! :) I'll ask Denny what "Kn" means because if I ask you for an explanation you will tell me some BS and I'll have to believe you because I won't know if it's BS or not!! Besides are you sure it's not .00019 Kn?

newtons
 

Donny, you know.
Newtons, like Fig Newtons

Terry should there be much difference in preformance between a 2 stroke or 4 stroke of the same HP?

Fig Newtons??? I don't need no stinking Fig Newtons, I'm not one of those old farts with two or three packages in the shopping cart, along with their prune juice, so they can stay regular!!! :D

No, but the label on the outside of the cowling seems, any more, to have little to do with the actual Shaft Horsepower/Ft. Lbs of torque/Kilowatts/Newtons!
I think the 115 Yamaha is actually 107 Hp and the 115 E-tec is 129 Hp.

Bert, don't get caught up in the "little stuff" and remember it's all "little stuff". Find a good marine mechanic close by and bolt something on and go. You are waisting sunsets, Captain! If you want used call Ellis Outboard in Bradenton, Florida (no he ain't got no stink'in web-site to tend to - he's busy rebuilding motors). He'll build you a 90 Yamaha 2-S and hang it on your 20' Hydro-sport. By the time you wear that out you'll be like 450 in Dog Years!

Go git them Stump Knockers ands Shell Crackers, man

"By the time you wear that out you'll be like 450 in Dog Years"

....no doubt, especially if you really flush the engine with salt-a-way every time out and do not let gas sit in the carbs very long. Ask me how I know.

Oh yeah, "In dog beers, I only had one" last night!!! :)

Flushing situation!
 

Now Donny, if you was foller'in the thread more closely Berts80 said he was gonna' use the Saw-Zalled HydroSport on a lake. So unless he's e-mail'in from either the Dead Sea or Utah, he pretty much got the fresh water "flush" situation handled. The Yamaha Carbs are a pain with regular fuel if you don't run them dry or drain them. If yur running that corn alchol mix, it really gets boring. The mullet fisherman, guides and crabbers who use them every day don't have any trouble with them, but most of them run real gasoline and not some half-shine cocktail!
Speak'in of which, I hope you ain't been "test driven" no "essence of corn" based refershments what you been supposed to be sav'in fer da' Gathering based on these recent comments about flush'in a lake motor. Marsh was ax'in me the other night "Do you think Donny will share some of that Pink Pantie Drop again?". I said "Dang Girl, you can't jest go around ax'in stuff like dat at on one of these high brow CSC events". (She's a Hoosier and ain't as wise to the way of the world as her Cracker better half is). So anyway while nobodys listen'in "are you bring'in some of dat shit?"