Different Cockpit Drain Systems on M17's.

The cockpit drains on the 17's is one of the features which has changed through 
the years. Our 17 is an 1988 model and has 2 openings in the rear-floor of the 
cockpit. These feed water into a wet locker. From the wet locker 2 drains route 
water out to drains molded into the hull below the waterline near the stern. I 
believe this setup was standard on 17's built from the early 80's up until 
around 1993.

The down-side of this setup is if one of the hull fittings or hoses connecting 
the fittings to the wet locker where to fail you could take on serious water in 
a hurry. Others have written about checking and repairing/replacing these parts 
if needed. The plus side is they do a very good job of keeping the cockpit 
floor absent of water, even in choppy and following seas.

This vintage 17 also has secondary cockpit drains. These are large holes in the 
transom several inches above the waterline. Should the wet locker not be able 
to drain fast enough these holes allow excess water to exit out the stern. 
These holes are several inches above the water line, minimizing the chance of 
water entering the wet locker through them in choppy conditions.

I think with the earliest 17's have a single drain in the rear floor of the 
cockpit which drains out below the waterline.

The newest 17's have the system you guys describe. Where 2 large opening in the 
transom at the waterline connect through hoses which pass through the rear 
cockpit locker to drains in the rear of the cockpit. I think it's in these 
hoses sailors sometimes put check valves to keep water from splashing back into 
the cockpit. The disadvantage of this system is with the drains at the 
waterline it is easily for water to find its way into the cockpit. Or, if check 
valves are installed having them closed should you take on a bunch of water. 
The advantage is there is nothing below the waterline which could fail.

Each system seems to have its advantages/disadvantages.

Randy Graves,
M17 #410

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Subject: Re: M_Boats: Crew Capacity...

The M-17 I got last summer (#633) has seacocks installed in the cockpit drain
lines.   With them open, water does splash into the cockpit a little,
particularly in a following chop.   It drains back out, and is only a minor
irritation. Close them up and is stays dry at all times.   I've never taken on 
any real
water over the side or bow, but if I did I'd want to open them up quick.

Rick


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