Land and Sea Dyno Results from the 80's
 

SNagged this off screamandfly.com "treasures" thread.

http://www.wellcraftv20.com/gallery/..._121.sized.jpg

Re: Land and Sea Dyno Results from the 80's
 

I would like to hear/see that 150 Merc. at 9300 RPM!!

Re: Land and Sea Dyno Results from the 80's
 

Me too. I had my old 1981 v225 @ 6500 with a 17P highfive and it sounded like a nest full of hornets. I wonder how many motors blew up during those dyno tests. It's interesting to see the stock HP of some of these old motors . . . like OMC 2.6L motors (that became the Yamaha 2.6 we all know and love)

Re: Land and Sea Dyno Results from the 80's
 

Somewhere on Scream n Fly is a Dyno test sheet that showed the 1973 Mercury XS1500 inline 6 cyl as producing 220 hp at 7500 rpm. I used to have one of those mounted on a 14'8" Cacci Craft (copy of the Checkmate V-Mate.) It would run low 80's, but was real squirrelly.
I blew it up.

Re: Land and Sea Dyno Results from the 80's
 

Frank - I love those 1500XS motors . . . very rare these days. Just Curious . . . How many old mercs on a 20CC do you think it would take to break fountains (self proclaimed Center Console world speed record)?

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

Re: Land and Sea Dyno Results from the 80's
 

With the record at 87 mph, I imagine a 20' SeaCraft with triple XS1500 motors turning 7500-7800 rpms could handily beat that. I know personally, that a 1983 20SF with a single Merc 225 on a jack plate, w/ nose cone and low-water intakes, a blueprinted hull, turniong a 14 X 32P over-hub chopper prop has hit 71 mph - with a 28 yr old female attorney at the helm.
Imagine the same boat with triple XS1500 motors producing a total of 660 hp with speedmaster or scimitar lower units.

I think 90+ mph is possible.

Re: Land and Sea Dyno Results from the 80's
 

I don't know where to get 1500xs, but I have two old V200's and a set of horizontal front halves in my garage. :)

Re: Land and Sea Dyno Results from the 80's
 

The 1500XS 20" shaft was 275 lbs and the V200 20" shaft was 336 lbs. triples would be 825 lbs or 1008 lbs. And I know the V200 had a nasty tendency to self-destruct above 6500 rpm's.

Besides, you can easily fit triple XS motors on the transom of a 1973 20' Superfisherman. We had one with twin Merc 85 hp motors, and I commented at the time that you could fit 4 of them across if you wanted to. It would just submerge the transom. But not with a bracket :D

Re: Land and Sea Dyno Results from the 80's
 

Hmmm . . . sure would be a fun winter project. I love the idea of using 1500xs's I just have no idea where I'd find them. . . . I've seen lots of old freshwater Merc 1350's and 1500's for $300 - $1000 :)

Re: Land and Sea Dyno Results from the 80's
 

Very interesting... I wonder if my 1980 115 I-6 is also rated at 130???

That is some crazy horsepower from the 150's too. No way I would run it at those rpms though.