Ed, what tires do you have on the Max? You mention the Rawhides and with the 16hp engine, I'd guess you have the 21" or 22" tires. These tires are simply too small for a larger vehicle like the Max IV. No where near enough floatation and that is why it bobs like a cork. The Max IV really needs the 26" tires to achieve its real performance level. The larger tires will give you the floatation you need in the water, amazing water speed, almost 10" of ground clearance, and some of the best mudding ability you can get from an amphib. Those 26" tires require solid axles and I would recommend at least the 20hp engine. All types of tires can be run as low as 1psi with the newer rims, or about 3psi with pre-'99 rims. Also, they must be on backwards to paddle water to move the vehicle.
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if it don't float with out you getting wet . don't bring it ! 
R.I.P sage rogers 4 11 09 .
Originally Posted by Badmoonrising
my first reply but i have experienced the same trouble.my max 4 bobs like cork also. it has 22" rawhides and does not swim for squat. I was dissapointed with its propulsion in the water extremely impressed everywhere else,this thing will literaly climb a tree,however a steep muddy creek bank can have you hunting the come along in short order. Any way i went thru all the same thought I want 26" swimmers also more clearance would be great but being on a budget and unable to justify hundreds of dollars for tires on a maybe it will swim better is just not gonna happen anytime soon.Trolling motor sort of p.i.a. Any way thought about all kinds of paddles think i read every post remotley related to max 4 swimming and between all the things other folks have tried (thank you all) I finally cut an old motorcycle tire into 2.5" strip cut it down the middle,now i have an"L" shape. I forgotten to mention i have one oddball tire, Stryker with 3/4' square block knobs on sides, any way i literally screwed just one "L" shaped piece of ruber onto the knobs and one on the lug of the rawhide on opposite side and drove off the bank. Whoo hoo this puppy can now actually move thru the water!! Now I am only going to buy one more stryker tire cuz i dont like the way the rubber paddle holds on the rawhide,lugs to far apart ,not enough shoulder on lug to hold for much abuse i think,anyway now i am going to try it with three rubber L paddles on each back tire only. the improvement with just one screwed on was considerable.Oh as for if it tears off? i lose 2 screws and a peice of old bike tire ,i got more
