eaglescout526 Posted April 3 Share Posted April 3 I would like to just do a PSA since I couldnt find the internal difference anywhere via pics or word so I took it into my own hands to figure it out and I am glad I did lol. 16: 23.5: don't worry, I plan to clean it out before use. BUT! Note the shorter vent pipe. And only reason why I did this as the tank I bought a while back from a member in CA didnt have the tank ID plate on it so I had to find out and verify. External differences 23/16 tank: Dims: (from lip to lip) 37"L 17 1/2"W ~15H 18 tank: Dims: ? 16 and 23 side by side Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 holy crap! can I get more gas into a 16 gall if I trim the vent tube? Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 does anyone have any pics of the 3 tanks next to each other? Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 2 minutes ago, Pete M said: holy crap! can I get more gas into a 16 gall if I trim the vent tube? Pretty much! Call it a fuel hack lol. Hang on a moment. I have pics of an 18 gallon. Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 Actually I don't have a good pic of the internal to an 18. But I will say its the exact same, but it fills more direct rather than the fill tube on the 16/23 being curved toward the slosh pan. Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 how do they compare size wise? what are the dimensions? Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 The 16 gallon is definitely longer than the 18 gallon tank. But the 23 and 16 gallon are one in the same tank only with the fuel "baffle" being different to let less or more fuel in. Once the light returns tomorrow morn I will edit the main post with the pic of the 23 gallon. @Torq_Shep, not sure if you installed the tank yet but would you mind providing us the dimensions of this lovely tank I sold ya? Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 2 minutes ago, eaglescout526 said: The 16 gallon is definitely longer. longer than what? Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 1 minute ago, Pete M said: longer than what? My bad, it is longer than the 18 gallon tank. I edit my post to reflect. Quote Link to post Share on other sites
WahooSteeler Posted April 3 Share Posted April 3 If Eaglescout is willing to write one up, I'd like to recommend a sticky on this subject of fuel tank dimensions and FSU's for the 3 different sizes with accompanying pictures. Even though new tanks and now FSU's are available, this info IMO is one of the most common subjects that I've seen in the 10+yrs I've been on this site. Quote Link to post Share on other sites
gogmorgo Posted April 3 Share Posted April 3 Interesting. My build sheet said mine came with the 23gallon tank, but it always seemed like I was forcing fuel into it to fill it all the way. Makes me wonder if it didn’t have a 16gal swapped in at some point. It was confusing to me given how hard it should be to plug up such a big vent tube. Unfortunately I can’t really investigate this because that tank was swapped out a few years ago after an incident with a deer, and the shop that did it tossed the old tank. I also haven’t been to a gas station with it yet due to it being mostly parked awaiting rust repairs to pass an inspection after an interprovincial move so I don’t know if anything changed. Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 I’d be willing to do a write up on all the specs and what not of the gas tanks and FSU’s. Would be an invaluable thread with hopes that all those questions could be answered with one topic. Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 9 minutes ago, gogmorgo said: Interesting. My build sheet said mine came with the 23gallon tank, but it always seemed like I was forcing fuel into it to fill it all the way. Makes me wonder if it didn’t have a 16gal swapped in at some point. It was confusing to me given how hard it should be to plug up such a big vent tube. Unfortunately I can’t really investigate this because that tank was swapped out a few years ago after an incident with a deer, and the shop that did it tossed the old tank. I also haven’t been to a gas station with it yet due to it being mostly parked awaiting rust repairs to pass an inspection after an interprovincial move so I don’t know if anything changed. the build sheets are not infallible, especially the tank size (a LOT of them say 20 gal for some reason, which was never offered in an MJ ) Quote Link to post Share on other sites
gogmorgo Posted April 3 Share Posted April 3 56 minutes ago, Pete M said: the build sheets are not infallible, especially the tank size (a LOT of them say 20 gal for some reason, which was never offered in an MJ ) All I know is I once managed to put 25 gallons into it. 95 litres per the pump. ¯\_(ツ)_/¯ Quote Link to post Share on other sites
MiNi Beast Posted April 3 Share Posted April 3 i want a 40 gallon that fits in same location. Quote Link to post Share on other sites
Pete M Posted April 3 Share Posted April 3 27 minutes ago, gogmorgo said: All I know is I once managed to put 25 gallons into it. 95 litres per the pump. ¯\_(ツ)_/¯ it is very likely that the tank itself holds more than 23 gallons. in theory the shutoff triggers before it is completely full, but if something has gone wrong, it might not stop on time. Quote Link to post Share on other sites
Torq_Shep Posted April 3 Share Posted April 3 15 hours ago, eaglescout526 said: The 16 gallon is definitely longer than the 18 gallon tank. But the 23 and 16 gallon are one in the same tank only with the fuel "baffle" being different to let less or more fuel in. Once the light returns tomorrow morn I will edit this post with the pic of the 23 gallon. @Torq_Shep, not sure if you installed the tank yet but would you mind providing us the dimensions of this lovely tank I sold ya? here's the 18: Will do. If I havent gotten it by tonight PM me and I will get dimensions tomorrow. Quote Link to post Share on other sites
eaglescout526 Posted April 3 Author Share Posted April 3 14 minutes ago, Torq_Shep said: Will do. If I havent gotten it by tonight PM me and I will get dimensions tomorrow. Perfect! Quote Link to post Share on other sites
ghetdjc320 Posted April 4 Share Posted April 4 So on my 91 swb I believe I have like a 16 or maybe 18 gallon tank. Is there an internal mod that would add fill-up capacity? Quote Link to post Share on other sites
eaglescout526 Posted April 4 Author Share Posted April 4 Short beds should only have the 18 gallon tank. If you got a long bed tank into a short bed, I would like to see that. I know some SWB guys would like to as well. Quote Link to post Share on other sites
Pete M Posted April 4 Share Posted April 4 if there's a way to shorten up the tube inside, then maybe? I don't remember hearing of anyone trying. Quote Link to post Share on other sites
Pete M Posted April 4 Share Posted April 4 ran out and peeked into what I think is an 18 gal and I don't really see any way to add capacity. Quote Link to post Share on other sites
ghetdjc320 Posted April 4 Share Posted April 4 1 minute ago, Pete M said: ran out and peeked into what I think is an 18 gal and I don't really see any way to add capacity. Yeah I was looking up a video of the inside of my tank that I took when I cleaned it out and don’t see anything that would open up capacity. All well, the 18g tank works for me, always nice to not have to fill up as often especially at $4.75/gal Quote Link to post Share on other sites
eaglescout526 Posted April 4 Author Share Posted April 4 1 minute ago, ghetdjc320 said: $4.75/gal WOW. Thats California prices right there. Quote Link to post Share on other sites
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