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VTJC
03-12-2007, 07:43 PM
Hi All,

It seems I will be moving closer to my in laws who live on a nice lake in Eastern CT. The good; they have lots of lake frontage, there is a course and some active slalom skiers. The bad; the lake has a silly 150hp limit for inboard and 75hp limit for outboards. I would prefer they limit speed and noise directly, instead of power. My boat probably only goes above 37mph a few times a season and is quieter than many of the boats on the lake. The lake has long setups for the course, so out of the hole power isnít as important as torque to prevent skier from slowing the boat down.

So to my question, what would make the best 150hp ski boat? The skiers on the lake have an old IO that skis remarkably well, but I miss the tracking of an inboard. I am looking for advice on hull and engine. I used to have a 98 Moomba Boomerang with a Chevy 350(310hp), I know some of the early 90ís versions had Chevy 4.3L V6(but probably where rated for over 200hp). So putting an I4 into a Boomerang or an 80ís MC hull might be ok. I was also thinking about a Chevy 6.5L diesel swap into an 80ís MC. I am hoping to keep this project under $10k, but will probably own it for ever.

If anybody knows of an 80ís MC with a bad motor please let me know.

Thanks in advance for advice.

Jamie

T Scott
03-12-2007, 08:02 PM
How about a Barefoot 200?? Peel the 200hp decals off and put on a 150hp decal.:D :D

VTJC
03-12-2007, 08:06 PM
Nice idea, but Outboards are limited to 75HP.

Jerseydave
03-12-2007, 08:13 PM
How about a Barefoot 200?? Peel the 200hp decals off and put on a 150hp decal.:D :D

He said 75HP max. outboard.

That's quite a problem, but you're on the right track with a diesel-powered MC. Maybe look into some small diesel engines out of a tractor or something similar. (Although they are heavy engines)

Do some old Century boats have under 150 HP?

whitedog
03-12-2007, 08:24 PM
Diesel conversion sound interesting. Look at small JD 4 cylinder diesel. VW makes and industrial Diesel that may work. Then there are the Yamar marine diesel but that would probably break the budget.

Jerseydave
03-12-2007, 08:44 PM
My truck has a 3126 CAT engine with only 190HP. Maybe they make a lower HP model. Or go to a dealer that sells used farm equipment and see what they have/suggest.

Here's a pic of the truck with 190HP. Does over 70 mph and weighs 23,000 lbs.

Jerseydave
03-12-2007, 08:46 PM
Just thought of this..........check into a 4 or 6 cylinder ISUZU truck engine out of a small tilt-cab truck. Might be the right HP. Good luck.

VTJC
03-12-2007, 09:03 PM
This company http://www.marinedieselusa.com makes the 6.5L work in a boat. The transmission from a 350 would bolt up to a 6.5L. I have a VW TDI in my Jetta that I love, I can get one of those affordably for a swap but probably not enough power and transmission would be an issue.

erkoehler
03-12-2007, 09:06 PM
Or, get some creative title work done, and thus you have a MC w/ 150hp :)

Trust me, it can be done :)

ski_king
03-12-2007, 09:07 PM
Think lightweight!

There were some prototype GM diesels made back in the 80's, but they didn't work out as they didnt have enough speed.

CarlosCabanas
03-12-2007, 10:27 PM
How do they test how much hp you have? Buy a regular MC and put a 149 HP sticker on the engine!!!:D :D :D

WilliM1940
03-13-2007, 09:51 AM
I bought my older MC from a guy who used to tow it to eastern CT to water ski. I have been wondering why the registration says 125 hp, maybe this is why.

Sodar
03-13-2007, 09:55 AM
Definitely do-able!! We had a 33' boat that we had documented at 30', just so it could fit on our mooring over in Catalina. A friend has a 21' Schiada with a 700hp motor that he has registered at 200hp, just so he can get the boat insured. I am sure that you can find a 275hp MC and register it for 150hp... just do not give it full throttle!!! :D

VTJC
03-13-2007, 05:14 PM
Somebody on the Nichol’s board point me to this: http://www.budgetrv.com/93sk16.htm

According to NADA Guides(great source for old boat specs) they were made in 93-94. The Wave(1,500lbs) had 140hp and Wave Comp(1,800lbs) had 225hp. Now I have something to seek out.

The town is pretty savy with the engine ID’s. The guy with the IO is handy, so he puts in an I4 for his sticker then puts in a V6 for skiing. No way to get a V8 past them unless it originally only had 150hp, which I can document. I had thought I could get a V6 buy them by having a friend make up a 150hp dyno for it.

JKTX21
03-13-2007, 05:40 PM
Or, get some creative title work done, and thus you have a MC w/ 150hp :)

Trust me, it can be done :)

Kind of what I was thinking. Horsepower is a completely arbitrary matter... How big are the horses? What do you feed them? The list goes on. 8p

BeavenX5
03-13-2007, 05:40 PM
Another way that might worth looking into is Volvo.
Volvo Penta make a good and durable 4cyl marine engine and huge commerial diesel marine engines. They also used to build 4cyl diesel cars (old 1980-1990 240 and 740) and a few rare 5cyl 850 diesel.
Digging through scap yards, you might be able to convert an old Volvo Penta engine with a Volvo car diesel engine.
Or simply try fiting a volvo penta 4cyl gas engine in a 1980 MC. Both engine and boat would be fairly light.
A frend of mine has a 1982 Volvo Penta 4cyl engine in a heavy 1969 17feet I/O. It is a decent ski boat.

M-Funf
03-13-2007, 07:10 PM
Here's another source for new and remanufactured marine engines. There are lots of diesels listed, as well as transmissions to go with them.

http://www.tadiesels.com/index.htm

alp
03-14-2007, 01:39 PM
What lake will you be on? We live and ski in eastern CT and southern MA. I haven't had heard of any issues with hp limits on the lakes with courses.

Workin' 4 Toys
03-14-2007, 04:17 PM
There are some very interesting ways to get to 150 hp listed here:confused: . Some of which concern me.

mrm2083
03-14-2007, 07:48 PM
You can reprogram the ecu on a car to get more horespower, can't you just reprogram the ecu on the mastercraft to give u 150 hp and the same torque?

beatle78
03-15-2007, 12:07 PM
sounds to me like outdated rules. When they made those rules I bet 150HP was HUGE......

I've been battleing issues like this in RI on my private lake. What did I do? I got elected to the Board and "HELPED" update the rules and regulations :)

Sounds like you have some old timers that don't understand change......

I show you a 75HP outboard that's WAY louder and FASTER than my MC. You just have to learn how to get through to those people.....

AND it's always easier to ask for forgiveness than for permission :)

VTJC
03-20-2007, 12:20 PM
Here is a potential a 76 CC : http://www.correctcraftfan.com/diaries/details.asp?ID=675&sort=&pagenum=1&yrstart=1976&yrend=1980

Anybody know how a 16ft SkiTique skis?

ski_king
03-20-2007, 12:25 PM
I skied behind one of those many times. Not that bad, comparable to the 18 ft. version of same year, except it dosnt track as well. (either one fin or no fins)
With that 302 it would do 50 MPH easily as it was a light hull.

TRBenj
03-20-2007, 01:42 PM
I skied behind one of those many times. Not that bad, comparable to the 18 ft. version of same year, except it dosnt track as well. (either one fin or no fins)
With that 302 it would do 50 MPH easily as it was a light hull.

The boat he linked to had 180 hp, which would indicate a 2bbl carb. The 4bbl versions (200-220 hp) would run up around 50mph.

The Tiques are very light (1600 lbs) but I wouldnt expect them to lay down a small wake like an early MC.

ski_king
03-20-2007, 01:49 PM
The boat he linked to had 180 hp, which would indicate a 2bbl carb. The 4bbl versions (200-220 hp) would run up around 50mph.

The Tiques are very light (1600 lbs) but I wouldnt expect them to lay down a small wake like an early MC.
Good catch. The one I skied behind was a 4 bbl.