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Author Topic:   2003 Montauk 170 Gas Tanks
4WHALERS posted 07-01-2003 02:01 PM ET (US)   Profile for 4WHALERS   Send Email to 4WHALERS  
It's been a while since I visited but I remember someone saying they had bought 13-gallon Tempo fuel tanks to replace the factory 6-gallon tanks. They had mentioned they had to replace the fuel caps with a cap from an auto parts store (I think they mentioned Advanced Auto?). I have purchased the very econimical tanks but need to find the correct replacement caps so the tanks will slide in under the seat without the fuel cap hitting the seat. Anybody remember? The individual who posted the information even had a part number. Help?
Samars posted 07-02-2003 07:58 AM ET (US)     Profile for Samars  Send Email to Samars     
You can do a search for this information at:

Here is the information for you to get started:

(Tempo 13 gal. H12 X L20 X D14 )

Red Plastic Tempo info can be found here:

newer style Tempo Ultra PBW 13 gallon tanks fit, by modifying or finding a replacement filler cap...Walmart, Pep Boys, Advanced Auto Parts, etc.

Take care and good luck

4WHALERS posted 07-02-2003 06:47 PM ET (US)     Profile for 4WHALERS  Send Email to 4WHALERS     
Found them! Got replacement low profile caps for the Tempo Ultra PBW 13 gallon tanks at Home Depot!

Works like a charm. From 12 gallon capacity to 26 just like that! Thanks

Barney posted 07-02-2003 07:05 PM ET (US)     Profile for Barney  Send Email to Barney     
4Whaler, I will eventually replace my portables. Did you have to make any other mods? Barney
jimh posted 07-02-2003 10:15 PM ET (US)     Profile for jimh  Send Email to jimh     
Try WAL-MART for the low profile gas caps, too.
Beaner posted 07-03-2003 08:43 AM ET (US)     Profile for Beaner  Send Email to Beaner     

Do the 13 gallon tanks work with the existing hardware for the 6.6 gallon tanks or did you have to move the mounts and get new straps? Also, in what section of Home Depot did you find the replacement caps and are they vented? I was going to order a 24 Pate, but I'd rather use two bigger portables without having to change any hardware (and drill new holes). Thanks.

4WHALERS posted 07-03-2003 09:04 AM ET (US)     Profile for 4WHALERS  Send Email to 4WHALERS     
I found the caps in the lawn mower section right next to the replacement blades and other assorted replacement parts for lawn equipment. Yes, the caps are vented. You want to buy the cap that fits 2 1/8" openings.

I had to move the stainless tie down brakets on the floor. Sealed the old holes with a good dose of 3M 5200. I had extra straps from the mooring cover I bought that fit like a dream. Had to trim the tails just a little and heat the end to keep them from fraying.

It really makes it nice now having more than double the capacity of fuel for less than half the cost of a PATE!

Barney posted 07-08-2003 07:40 PM ET (US)     Profile for Barney  Send Email to Barney     
These 13 gallon tanks by TEMPO are available at less than $50 each online plus shipping no tax. Locally I priced them at over $70 each at a popular marine retail plus tax. Barney
lhg posted 07-08-2003 08:17 PM ET (US)     Profile for lhg    
Bass Pro sells these 13 gallon tanks for $39. Fittings for your engine brand are extra. You can also get a single 28 gallon tank for $105.
Barney posted 07-08-2003 08:24 PM ET (US)     Profile for Barney  Send Email to Barney     
Thanks, Bass Pro is now added to my "Favorites". The price differences are huge. I also priced one at a local boat dealer at $90. Barney
Barney posted 07-08-2003 08:25 PM ET (US)     Profile for Barney  Send Email to Barney     
Make that the 13 gallon take for $90.
4WHALERS posted 07-10-2003 07:49 AM ET (US)     Profile for 4WHALERS  Send Email to 4WHALERS     

Make sure you reinstall the stainless steel tie down clips just wide enough to allow the tank to slide in and out without touching the stainless brackets. If you do not the tank will want to raise up off the floor to clear the tie down brakets causing the top of the tank to catch on the seat. Install both tanks as wide as possible to allow you to reach in between the tanks to change over the fuel hose when one goes dry. Situate your tanks so that the fuel connections are to the inboard side of the boat (meaning they will be next to each other making it easy to unclip and re-attach to the other tank.)

Just a heads up if you decide to go this route.

Otherwise it has worked like a dream!

Barney posted 07-10-2003 05:56 PM ET (US)     Profile for Barney  Send Email to Barney     
4Whalers, Thanks much. Barney

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