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Author Topic:   Montauk underdeck gas tank

TahoeChris posted 07-10-2000 09:14 PM ET (US)
Is it possible to mount gas tank(s) under the deck of a Montauk? I would like to free up deck space and, short of buying a bigger whaler, I am trying to think of ways to maximize the room on the deck. Any other ideas? Thanks in advance.
reeltime2 posted 07-11-2000 11:31 AM ET (US)
Chris
I defanetly think it is not possible. Have you thought about putting it under the pilot seat? Maybe you could have a custum tank built.
kingfish posted 07-11-2000 03:19 PM ET (US)
Chris,
So far as I have been able to tell from the two Montauks I have owned, there simply is no way to put anything like a tank below the deck. There is no access, and if there were, all you'd have access to is foam, and you don't want to mess with that!
As per reeltime's comments, I had two twelve gallon steel tanks under the reversible pilot seat in one of my Montauks, they were'nt any more in the way than the two six gallon tanks you usually see there. I think I've seen some mention in this forum of plastic (maybe Tempo?) tanks of that type, of 12 gal. size or more. Strongly recommend you look in that direction-
Good Luck-
jcf
triblet posted 07-11-2000 03:55 PM ET (US)
My '98 Montauk came with a 25 gallon Pate
plastic tank under the seat. One nice
feature is that has a clear window all the
way down two sides so you can see how much
gas you DO have. (Phil Sammet, a buddy of mine,
says that an electric fuel guage on a boat
tells you how much gas you MIGHT have.)
Chuck Tribolet
Backlash posted 07-11-2000 04:22 PM ET (US)
Years ago I had Pate Plastics make a 12 gallon fiberglass tank for my 15 SS. It looked like factory equipment in desert tan gelcoat. The clear site window was fantastic! I put 45 gallons of gas in my 21' Walkaround last weekend (it was empty) and afterward the gas gauge warning light was flashing low fuel even though the tank was half full (it holds 92 gals). Sadly, the gauge is usless and I think the only remedy is to spring for a Floscan ($300) or the new Yamaha gauge($350).
Steve
lhg posted 07-11-2000 05:40 PM ET (US)
Until the ownership changes started happpening, Boston Whaler for years has always used the mechanical fuel gauges in the Outrage/Revenge floor, saying these were the only reliable solution, albeit more costly. But in the last ten years, in order to save money, they've switched 100% to the less reliable electric senders. But even the mechanical gauges vary somewhat.
In my 18 Outrage, when the mechanical gauge hits "E", the tank is still 1/4 full. In my 25 Outrage, when the mechanical gauge hits "E", you're dead in the water! I believe everyone with a built in tank, electrical or mechanical gauge, should run the tank dry (until the engine quits - not necessarily dry), then with the boat in the water, add gas until the gauge just begins to move off "E" and record gallons taken, then add gas until the gauge shows 1/8, record gallons taken, fill to 1/4, record gallons taken, etc. This will give you an accurate knowledge of what fuel you have left at a given reading.
Peter posted 07-12-2000 10:07 PM ET (US)
My 18 Outrage gauge reads about the same way as Larry's. F to 3/4, 3/4 to 1/2 and 1/2 to 1/4 are about 15 gallon increments. I've rarely run the tank much below 1/4 (at that point I figure I've got 15 gallons left) and the most gas I've been able to put in in one filling is about 45 gallons. That mechanical gauge is very reliable. It hasn't faultered and it's readings haven't changed in the eight years I've owned it.

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Author	Topic: Montauk underdeck gas tank
TahoeChris	posted 07-10-2000 09:14 PM ET (US) Is it possible to mount gas tank(s) under the deck of a Montauk? I would like to free up deck space and, short of buying a bigger whaler, I am trying to think of ways to maximize the room on the deck. Any other ideas? Thanks in advance.
reeltime2	posted 07-11-2000 11:31 AM ET (US) Chris I defanetly think it is not possible. Have you thought about putting it under the pilot seat? Maybe you could have a custum tank built.
kingfish	posted 07-11-2000 03:19 PM ET (US) Chris, So far as I have been able to tell from the two Montauks I have owned, there simply is no way to put anything like a tank below the deck. There is no access, and if there were, all you'd have access to is foam, and you don't want to mess with that! As per reeltime's comments, I had two twelve gallon steel tanks under the reversible pilot seat in one of my Montauks, they were'nt any more in the way than the two six gallon tanks you usually see there. I think I've seen some mention in this forum of plastic (maybe Tempo?) tanks of that type, of 12 gal. size or more. Strongly recommend you look in that direction- Good Luck- jcf
triblet	posted 07-11-2000 03:55 PM ET (US) My '98 Montauk came with a 25 gallon Pate plastic tank under the seat. One nice feature is that has a clear window all the way down two sides so you can see how much gas you DO have. (Phil Sammet, a buddy of mine, says that an electric fuel guage on a boat tells you how much gas you MIGHT have.) Chuck Tribolet
Backlash	posted 07-11-2000 04:22 PM ET (US) Years ago I had Pate Plastics make a 12 gallon fiberglass tank for my 15 SS. It looked like factory equipment in desert tan gelcoat. The clear site window was fantastic! I put 45 gallons of gas in my 21' Walkaround last weekend (it was empty) and afterward the gas gauge warning light was flashing low fuel even though the tank was half full (it holds 92 gals). Sadly, the gauge is usless and I think the only remedy is to spring for a Floscan ($300) or the new Yamaha gauge($350). Steve
lhg	posted 07-11-2000 05:40 PM ET (US) Until the ownership changes started happpening, Boston Whaler for years has always used the mechanical fuel gauges in the Outrage/Revenge floor, saying these were the only reliable solution, albeit more costly. But in the last ten years, in order to save money, they've switched 100% to the less reliable electric senders. But even the mechanical gauges vary somewhat. In my 18 Outrage, when the mechanical gauge hits "E", the tank is still 1/4 full. In my 25 Outrage, when the mechanical gauge hits "E", you're dead in the water! I believe everyone with a built in tank, electrical or mechanical gauge, should run the tank dry (until the engine quits - not necessarily dry), then with the boat in the water, add gas until the gauge just begins to move off "E" and record gallons taken, then add gas until the gauge shows 1/8, record gallons taken, fill to 1/4, record gallons taken, etc. This will give you an accurate knowledge of what fuel you have left at a given reading.
Peter	posted 07-12-2000 10:07 PM ET (US) My 18 Outrage gauge reads about the same way as Larry's. F to 3/4, 3/4 to 1/2 and 1/2 to 1/4 are about 15 gallon increments. I've rarely run the tank much below 1/4 (at that point I figure I've got 15 gallons left) and the most gas I've been able to put in in one filling is about 45 gallons. That mechanical gauge is very reliable. It hasn't faultered and it's readings haven't changed in the eight years I've owned it.