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Author Topic:   Classic 13 performance statistics
Jim Turnbull posted 03-21-2002 12:41 PM ET (US)   Profile for Jim Turnbull   Send Email to Jim Turnbull  
As a 2000 13 GLS owner, I'm wondering what other classic 13 owners are running for engines on their boats and what sort of speed you are getting.
I have a Mercury Classic 40 HP, 2 cylinder , 2 stroke with a Stainless Steel prop.
I top end at 40 mph and cruise at between 25 to 27 mph. The figures come via my GPS receiver.
I carry two 6.6 gallon fuel tanks whenever I go out and my fuel consumption seems to be fine.
How about you other 13 owners? What sort of performance are you getting with your boats?
Are there any performance tricks for my 13 that I should know about??


JFM posted 03-21-2002 12:57 PM ET (US)     Profile for JFM  Send Email to JFM     
Ain't that fast in a 13??? I know I wouldn't want to go any faster in my 13. I figure we do mid to high 30's with 200lbs. of people and 12 gallons of gas. Regards, Jay P.S. 1972 13' Sport with 1990 Erude 40hp.
JFM posted 03-21-2002 02:46 PM ET (US)     Profile for JFM  Send Email to JFM     
Make that 300lbs of people, son 75 me 225. My diet isn't working. Regards, Jay
buster1389 posted 03-21-2002 05:08 PM ET (US)     Profile for buster1389  Send Email to buster1389     
My 62 13' has an 1989 25 hp evinrude. I carry two 6 gallon tanks oars and an anchor. By myself, i break 26 knots on my gps. I usually cruise at 18-20 knots.
newboater posted 03-25-2002 12:08 PM ET (US)     Profile for newboater  Send Email to newboater     
Our 13 is powered by a vintage '75 Evinrude 40, with the really old and large style lower unit. We get 15-18kts in open water maybe 22 or so in the bay. The prop is aluminum (of course). No power trim or tilt. I need to play with the motor setting a little as it tends to bury the bow at high throttle settings.

But this weekend in sunny San Diego with 500lbs of driver, observer and passenger, and 11 gallons of fuel, it pulled me out of the water on a single ski! I'm no slouch either at 220lbs! It was really funny to see the little Whaler scooting along in front of me. I'm used to seeing a much bigger boat from that angle.

We love our 13!

Dave S.
San Diego

Bigshot posted 03-25-2002 02:04 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You are way underpropped, hence the waterskiing "incident". If she was propped for max speed, never would have happened. Watch your top end because you are gonna blow that thing if overreving.
newboater posted 03-25-2002 05:29 PM ET (US)     Profile for newboater  Send Email to newboater     

This probably needs it own message heading. Anyhow, Good call on the propping and over-reving. I think the wife may have been driving a little over 5k.

Is getting up on a single ski behind my Whaler going to be a "rare" incident for me? I get the feeling from your post either it wasn't that smart, or I shouldn't be doing it. (It was a shore start with about 15' of a running start for the Whaler, and I've got a 'Big Easy')

I bought a second hand tach, but I'm unsure I've got it hooked up on the right setting (pulses/rev). I would have thought 1 pulse/rev, but then it idles at 3000 rpm, which clearly isn't right. I think I ended up selecting 3 pulses/rev because it "seemed about right".

It's an old OMC tach and at this point I only use it for more relative measurements, and don't trust the absolute readings.

I guess I need to calibrate it with an inductive tach.

Dave S.

Bigshot posted 03-26-2002 02:32 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
When I weighed 120lbs with my 35hp and a 10x13 prop, it would barely get me out on 1 ski. The newer motors can do it easier but being 220 you have to be majorly underpropped.
timbo posted 06-23-2002 12:03 AM ET (US)     Profile for timbo  Send Email to timbo     
i have a 1973 13' sport w. a 1991 yamaha 40 and at wot I get 42 on fish finder spedo with battery mom dad and me 6 gallon tank full factory prop and smooth water
Dr T posted 06-23-2002 01:41 AM ET (US)     Profile for Dr T  Send Email to Dr T     
This thread is a nice addendum to a discussion of the right prop for a Sport 13 with a 1982 Johnson 35 HP. (See

Last fall, I tested three props on this boat: a OMC OEM 11x9 aluminum, a Quicksilver 10.5x11 aluminum, and an old OMC OEM (?) 10x13. The tests were made at Boyd Lake (about 30 miles north of Denver) at 5000 ft. altitude with winds less than 5 MPH. The trim position for the 11x9 was the middle hole only, for the other two I used both the middle and next to top holes. Speed was indicated by a paddlewheel. Boat load was about 270 lbs. of passengers, a 20 lb anchor (left over from windy Texas lakes), and one fairly full fuel tank.


11x9 22 mph 5800 rpm. Easy to pull the kids on a tube.

Middle Hole 24 mph 5000 rpm
2nd Hole 28 mph 5600 rpm Best all around. Could still pull the kids on a tube.

10x13 (suggested as optimum by several forum members)
Middle hole 24 mph 4000 rpm
2nd hole 28 mph 4600 rpm Bow-wow

Given earlier comments on props by forum members, I would have expected the 10x13 to turn at at least 5100 rpm at the best trim angle. Also, I experienced mild porpoising with this prop that I did not experience with the other two.

Clearly, this particular 10x13 is a real bowser on the boat. (I must say it never did perform that well close to sea level). On the other hand, the old 35 hp may have just run out of torque at this altitude.

Eventually, I will get a newly designed aluminum 10x13 to try.


polaris posted 06-23-2002 10:28 PM ET (US)     Profile for polaris  Send Email to polaris     
I have a 2000 GLS with a 99 Yamaha 40 HP 2 stroke. It will not run anything near that 35+. Use an aluminum prop and will run in the low 30's.

As a 59 year old 210 skier, it works fine. The secret is to use a Connelly Wide body slalomn ski. Up with no effort.

Samars posted 06-24-2002 08:08 AM ET (US)     Profile for Samars  Send Email to Samars     

My 67 13 has an antique 1968, 25 Evinrude...motor is tight, strong and still fairly reliable....

FYI though the only thing it can blow off is my ballcap if I don't have on backwards ! !

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