observer wrote in message
...
I've been outa the boat scene for 30 years but at that time I had a
18' outboard. I recall we had 2 metal 6 gal tanks (not built in) and
I think another metal 12 or 18 gal tank. Nowadays are the tanks
still metal or heavy plastic? And do they still have 6 gal tanks for
the outboard motors? Just trying to catch up with the same boats of
today. thanks.

Looks like the smaller motors come with 6 gallon plastic tanks which I've
not had good luck with. They expand during the heat of the day, which tends
to permanently deform the bottom of the tank so it doesn't fit flat to the
floor of the boat. Then at night, they'll suck in, further deforming. All
of this expanding and contracting seems to pull in air from outside with
it's moisture which the alcohol in the fuel then pulls into the gas mixture.
Also, I've noticed little cracks in the plastic at the edges from the
movement. Steel tanks are still available to purchase at some of the big
boating retailers (catalogue and on line). I picked up a couple of used
ones the other day for $5 each and they're going to replace my plastic ones

Tom G.