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Author Topic:   Water Lines
John O posted 06-01-2002 11:29 PM ET (US)   Profile for John O  
Where should the bottom paint reach on my '88 Newtauk with a Johnson 88 1988 motor. I think previous owner painted line too low. First time boat was bottom painted was two weeks ago. Do you measure from the transom up an snap a line?? Boat is on trailer and will go in next week.
jimp posted 06-02-2002 12:31 PM ET (US)     Profile for jimp  Send Email to jimp     
John O -

Your owner's manual, if you have one, might give an indication. If not, float the boat and accurately mark where the boat really sits. If the previous owner painted too low, how high do you want to raise it? Where do you want the waterline to be? Some folks paint them too high with 6" of bottom paint showing, others have the waterline exact. There's another previous thread in the forum about waterlines, I think within the last 30-45 days. Some good info in there.


John O posted 06-02-2002 01:12 PM ET (US)     Profile for John O    
Thanks no owners manual. Will call BW. had boat for three weeks and old owner just painted it. Think lines are too low and would like to raise before it hits the dock for summer. i'll look@previous threads
acseatsri posted 06-02-2002 01:43 PM ET (US)     Profile for acseatsri  Send Email to acseatsri     
Put it in the water and mark it lightly with a pencil or marker every 2 feet or so, then use masking tape and set it approximately 1" above your marks.
dfmcintyre posted 06-02-2002 07:51 PM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
I'd also agree to what acseatsri recommended. Make sure you'r standing in the water, not the boat to do it, and you've got all your accessories, tanks, etc in place, and that the load is equal, i.e. it's sitting level, at rest, from side to side.

Another quick way to do it, is just to mark the "corners", the port, starboard and bow. Take it out of the water and rent or borrow one of those spinning laser levels, rig it to hit both marks, then go up one or two inches to mask for the paint.


Tom W Clark posted 06-02-2002 11:27 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
John O,

No way you are going to get a satisfactory waterline with the dimensions from the BW Owner's Manual or from somebody else here on the FORUM. Your boat is different than everybody else's. You need to mark your own. Not too long ago somebody else painted their bottom with dimensions supplied here. It didn't come out right. You may as well do it right the first time.

To get an accurate waterline you need to launch your boat loaded with all the gear and fuel it would normally have on board when it's in the water.

Once you've done this you have two choices as Don says above:

1) mark the waterline while it's floating in the water.

2) mark it fore and aft and pull the boat and connect the dots latter.

If you use method #1 be forewarned: You will have to get in the water if you want to get all the marks under the bow. When I did my second Montauk I used this method and took the boat to a boat ramp early in the morning before there was any wind (even a little wind ripple will make marking the waterline difficult).

I wore a wet suit as it is cold in Puget Sound. I used gauge made of a dowel with a mark one inch from one end and held the mark at the water level and marked the hull at the end of the dowel one inch up where I wanted the masking tape to go. You can obviously make this distance whatever you want but it is difficult to get a pencil or pen to work at the water level itself.

If you use method #2 you can use a laser level that you rent. (I use my own Q2 by Laser Jamb which projects a flat plane without rotating)

You can also use a water level which is relatively inexpensive to make or buy. If you use either of the level techniques you will want to level the boat side to side and then use the tongue jack on your trailer to raise or lower the bow the the point where your mark o the bow is level with your mark on the stern.

Or you can mark the water line off of a flat slab you park the boat on with a "story pole" or stick cut to length and walk around the boat marking the hull every foot or so. You need to be on a really flat slab for this method to work well.

John O posted 06-03-2002 09:37 AM ET (US)     Profile for John O    
i agree that BW specs will not help. Looks like i am getting wet..huuuum.. how could is the H2O in Gloucester, Ma this time of year.


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