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Author Topic:   15' sport water level?
BCC posted 05-20-2001 07:26 AM ET (US)   Profile for BCC   Send Email to BCC  
I've been reading/enjoying this forum for a long time but this is my first post. Anyway, yesterday I bought a '81 sport (15ft) with a 70 Johnson. If I pulled the drain plug, how much water could I expect to come inside the boat. Looking from the outside water line it looks like it wouldn't come much higer than the square bilge area. Thanks for any responces.


jimh posted 05-20-2001 08:20 AM ET (US)     Profile for jimh  Send Email to jimh     
On my 15-Sport I can leave the drain plug out and water will fill only to the top of the drain sump.

Of course, if I am standing in the stern of the boat, it will fill much higher!

But the static trim of the boat should only permit water to enter to a point below the top of the sump.

Factors which could affect this:
--weight of the engine
--weight and location of fuel tanks
--weight and location of battery(s)


maverick posted 05-20-2001 01:30 PM ET (US)     Profile for maverick  Send Email to maverick     
Yep, I agree with JimH. Same goes for my 18.6 outrage. Pretty cool boat when one can leave the plug out indefinitely. Best, Mav
russellbailey posted 05-21-2001 10:25 AM ET (US)     Profile for russellbailey  Send Email to russellbailey     
Our 15' sits deeper, with the combination of the 70 hp Evinrude, 18 gallons of gas, and a battery in back.

With no one in the boat, water gets about 0.5-1.0" higher than the sump.

It's done this since Day 1.

So, little water, but definitely some above the sump.

BCC posted 05-21-2001 11:52 AM ET (US)     Profile for BCC  Send Email to BCC     
Thanks everyone,

Would you guys recommend installing a bilge pump with this BW.

Russel, How fast does yours top out. I have about the same setup '81 boat, '84 OMC seahorse. I'm guessing it will run about 35-40mph. Thanks again.


russellbailey posted 05-21-2001 02:53 PM ET (US)     Profile for russellbailey  Send Email to russellbailey     
We have never had a speedometer on it. It has a 1988 (prop-rated) 70 on it. From others on this forum that have measured it the top speed should be close to 50. Regular poster Clark Roberts has an empirical equation for estimating speed that should get you close to actual.

We rarely go full throttle other than getting skiers up. It's top speed is faster than I care to go.

Toad2001 posted 05-22-2001 02:46 AM ET (US)     Profile for Toad2001  Send Email to Toad2001     
I just installed a rule fully auto bilge pump, 500GPH in my 15' whaler. It has no switch, it simply cycles every 2 minutes and pumps out water (if any). My boat is moored in salt water and I didn't want sea water sloshing around in there all the time. The bilge pump also makes it way easier to wash the boat while its moored.
It is a very clean install.
I mounted the strainer with 3M 5200 so no holes were drilled.
Matthew posted 05-23-2001 01:42 AM ET (US)     Profile for Matthew  Send Email to Matthew     
I have the same boat and engine from the same year--had the same experience as Russell, 1/2" above the sump. I wouldn't think that you would need a sump unless you were mooring it like Toad. Just get it up on a plane and pull the stern plug--if it is even installed.

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