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Author Topic:   Sport 13 On-Deck Fuel Tank; Fit Under Forward Thwart Seat
stayinstrewn posted 01-05-2008 11:57 PM ET (US)   Profile for stayinstrewn   Send Email to stayinstrewn  
Hi. I am looking for any ideas for a tank that will fit under the front bench of my 1972 Boston Whaler 13-footer. It is powered by a 2002 Johnson 40-HP and [the boat] sits very low, typically below water line. Does anybody have any experience fitting a tank under the bench? This boat has a one-third console on the starboard side, but shouldn't interfere with any tank up there. Boston Whaler does not manufacture such a product. Any help would be appreciated. Cheers--SS
dburton posted 01-06-2008 12:20 AM ET (US)     Profile for dburton  Send Email to dburton     

Welcome to the forum! Check this site out. It has much information that can be missed by a new or occasional visitor.

This is a much discussed topic:

Use the search function.

try this in the mean time:

dburton posted 01-06-2008 12:22 AM ET (US)     Profile for dburton  Send Email to dburton     
PS. go with the moeller 12 gallon tank. Check out Overtons or Cabela'O
AZdave posted 01-06-2008 01:10 AM ET (US)     Profile for AZdave  Send Email to AZdave     
Go to and scan down to a response by jflots In his personal info (box with smiley face) you will find his home page. It includes an entry for an under seat tank. It is about the cleanest I've seen. It may not be cheap depending on the cost of sheet metal work in your area. Dave
Murphy posted 01-06-2008 01:56 AM ET (US)     Profile for Murphy  Send Email to Murphy     
I have a 12 gallon Tempo tank under the front seat of my 13 and it works great.


stayinstrewn posted 01-06-2008 10:09 AM ET (US)     Profile for stayinstrewn  Send Email to stayinstrewn     
thanks alot for the quick responses guys...I will look into the Moeller....I wasn't sure if there's enough clearance for the Tempo does your 12 fit in? does it fit cleanly w/ good access for the hose and the cap?



Tohsgib posted 01-07-2008 12:19 PM ET (US)     Profile for Tohsgib  Send Email to Tohsgib     
I left my tank in the stern and put 40lbs of lead dive weights in the front hatch...awesome. Under my front thwart is a custom storage box so I have no alternative. My comment is mainly because with a tank up there you will have to screw stuff to the deck to secure it, etc. A few dive bags up front is easier and cheaper. Plus nothing fits in that darn hatch anyway except 20' of rope.
jflots posted 01-11-2008 01:41 PM ET (US)     Profile for jflots  Send Email to jflots     
Here's a link to photos of our tank. 13%20Whaler%20custom%20fuel%20tank/

I holdes 8.3 gallons and hangs from the forward seat so it hovers off the floor for cleaning. If anyone is interested email me and I'll forward you a drawing for a local fabricator to build to. Please check the fit to your boat's arrangement since they vary.

All I ask in return is a photo of your boat with the tank installed. Thanks.

Binkie posted 01-12-2008 11:14 AM ET (US)     Profile for Binkie    
Here`s another solution that works, maybe even better. Unscrew your whole interior, and move it forward 5-6". Then mount the rear thwart seat on top of the seat clamp. Now you can fit 2, 6 gallon gas cans and the battery under the rear thwart. The difference in the way the boat rides is amazing. Hopefully your steering cable is long enough, (only downside)


kamie posted 01-13-2008 03:20 PM ET (US)     Profile for kamie  Send Email to kamie     
where is your interior in relation to the transom on your boat?


Yiddil posted 01-13-2008 04:47 PM ET (US)     Profile for Yiddil  Send Email to Yiddil     
Nice set up!!! Really Like the fabricated tank...I have two of the old metal tanks, with rubber tank matts in the stern of my 13. I like the mobility, but this setup is sweet....ncie picks:) Henry
stayinstrewn posted 01-13-2008 08:43 PM ET (US)     Profile for stayinstrewn  Send Email to stayinstrewn     
rich, thats a good idea too...moving my ass and gear forward would certainly help!! heading to cabellas soon to see the tanks in person and will prob buy the 12 gallon tank.

thanks for all the good ideas.


jflots posted 01-14-2008 04:18 PM ET (US)     Profile for jflots  Send Email to jflots     
Moving everything forward would also gain you some needed space in the stern, helpful if you fish 2 people in the boat.
PeteB88 posted 01-16-2008 10:50 PM ET (US)     Profile for PeteB88  Send Email to PeteB88     
Hey Rich - can you post a picture of your set-up? pb
Binkie posted 01-17-2008 02:05 PM ET (US)     Profile for Binkie    
kamie from the INSIDE of the transom at the centerline of the boat to the REAR of the rear thwart is 42 1/2 inches.

Pete, there are photos in my profile. The heavier console probably helps also.


kamie posted 01-17-2008 09:46 PM ET (US)     Profile for kamie  Send Email to kamie     
Thanks Rich
Murphy posted 01-19-2008 11:14 PM ET (US)     Profile for Murphy  Send Email to Murphy     

Sorry for the late reply, but the Tempo has abou 1/4" clearance of the gas cap under the seat. The hose is no problem... I think this tank was made for this very situation.

I may try to find a different cap b/c sometimes if the boat bounces around riding it can close the vent on the cap.


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