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Author Topic:   Montauk 170 Gaining Weight

swist posted 11-07-2013 05:26 PM ET (US)
My mechanic pointed out that it appears that the waterline on my 2004 Montauk 170 has risen maybe an inch since the boat was new. Given that slow a rate (1/8" per year) I never really noticed, although now that he mentions it, I did observe that the swim platform, which barely cleared the water when the boat was new, is now right at the water level. And there is a line of crud where the bottom paint is not quite making it to the waterline.
I have not noticed any difference in performance, although if you lose just a few percent every year, you may not notice. And with a painted hull, and extra accessories (26 gal tank and heavy full width rear bench seat, it is hard to compare my numbers to the ones Whaler publishes).
The boat is moored all Summer. Sounds like maybe my foam is getting wet, although the only holes in the hull are those from the factory. The theory is that lack of watertightness is rarely noticed on that model as 90% of them are trailered.
What do I do? Someone said drill same holes, let it dry out all winter, and epoxy them closed. Is this a good idea? How many holes, how big, and where, what kind of epoxy?
I find it hard to believe that a hull that is supposed to last a lifetime has an unfixable problem here.

jimh posted 11-08-2013 11:44 PM ET (US)
Boats tend to acquire weight from all the gear stored on them. Before you decide the hull is loaded with water, check carefully on all the weight that might be due to gear on board. It is not unusual to have 100-lbs of gear, or more.
Ridge Runner posted 11-09-2013 06:03 AM ET (US)
Check the rigging tunnel and where the cables and steering lines exit the rear step/seat on the starboard side of the boat. You should have a round access hatch there - the early 170 Montauks would collect water in there and if the very small drain hole in the rigging collar is blocked the water will not drain into the splash well.
Also as Jimh states any additional weight that you might have left in the boat for even a couple of days could create a scum line above your "normal" water line. My 2005 170 Montauk sits about quarter of an inch lower when my 25 gallon fuel tank is full compared to empty.

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Author	Topic: Montauk 170 Gaining Weight
swist	posted 11-07-2013 05:26 PM ET (US) My mechanic pointed out that it appears that the waterline on my 2004 Montauk 170 has risen maybe an inch since the boat was new. Given that slow a rate (1/8" per year) I never really noticed, although now that he mentions it, I did observe that the swim platform, which barely cleared the water when the boat was new, is now right at the water level. And there is a line of crud where the bottom paint is not quite making it to the waterline. I have not noticed any difference in performance, although if you lose just a few percent every year, you may not notice. And with a painted hull, and extra accessories (26 gal tank and heavy full width rear bench seat, it is hard to compare my numbers to the ones Whaler publishes). The boat is moored all Summer. Sounds like maybe my foam is getting wet, although the only holes in the hull are those from the factory. The theory is that lack of watertightness is rarely noticed on that model as 90% of them are trailered. What do I do? Someone said drill same holes, let it dry out all winter, and epoxy them closed. Is this a good idea? How many holes, how big, and where, what kind of epoxy? I find it hard to believe that a hull that is supposed to last a lifetime has an unfixable problem here.
jimh	posted 11-08-2013 11:44 PM ET (US) Boats tend to acquire weight from all the gear stored on them. Before you decide the hull is loaded with water, check carefully on all the weight that might be due to gear on board. It is not unusual to have 100-lbs of gear, or more.
Ridge Runner	posted 11-09-2013 06:03 AM ET (US) Check the rigging tunnel and where the cables and steering lines exit the rear step/seat on the starboard side of the boat. You should have a round access hatch there - the early 170 Montauks would collect water in there and if the very small drain hole in the rigging collar is blocked the water will not drain into the splash well. Also as Jimh states any additional weight that you might have left in the boat for even a couple of days could create a scum line above your "normal" water line. My 2005 170 Montauk sits about quarter of an inch lower when my 25 gallon fuel tank is full compared to empty.