I`ve just aquired a Sevylor Ranger today, of course I had to blow it up to check it out when I got it home. I`m kind of stumped by the pressure gauges though, does anyone have a Sevylor and could explain what I`m looking for as the instructions are carp to be honest.
I`m wondering if the guages are knackered from being stored wet or something but nothing seems to change, inflated or deflated.
By the way the gauge is cutting into the rubber at the bottom, i think there is plenty of air in there mate. The gauge should either be around "a" in certain weather conditions, and around "b" in others (but for now I cant remember which).
The book with my Sevylor made it pretty clear. You could try the Sevylor website.
Could be the cells have just stretched a bit with age or maybe with being left inflated for a length of time.
If there's any bend when you kneel in the middle(on the water) stick some more air in until it holds it's shape and that's about the A setting. At B it's bulging a good bit, the boat is rock solid and you've lost a couple more inches of internal width. I only took mine all the way to B once and it seemed a bit extreme.
Once you've found the right pressure it'll not be hard to replicate the next time. You'll get used to the tone when you tap the cells and to how much it's bulging round the gauge panel. Cheap dingys don't have gauges, you just get used to how much to pump them up.
Mind if you pump it up on a chilly summer morning - by afternoon when it's warmed up the cells will be ringing like a drum skin. Works the other way too, blow it up at lunchtime and the next morning it'll have gone soggy on you from the cold overnight.
If the cells have stretched a bit it'll mean they aren't returning to their original size but I still wouldn't take it above the B unless it needed it. If you mess about and try it you could always just make new marks with a magic marker.