Outboard Jet

Maybe on a jetski. My 21' aluminum jetboat actually maneuvers fairly well
at slow speed, Just have to understand the characteristics. Does not troll
well as you have to drive the boat 100% of the time at slow speed. Gravel
bars and crap on the surface are the reason to run a jet. The prop boats
really have a bad day with gravel bars and stuff on the surface. I have
felt a little stupid parked on a gravel bar in the middle of the Sacramento
River. Takes a little help to get the boat off, then I pry the extra gravel
out of the jet intake grate. Go boating. As to greasing the impeller,
never heard of that on an o/b jet. My inboard, I just shoot some grease in
to the zerk fitting on the thrust bearing a couple of times a year.
Impellers may be $500 but I am still on my 1991 stainless impellers, and I
have 3 of them in the 3 stage Kodiak jet. Have had to change the kicker
prop. About $75 for a 15 hp Mariner I used to use.
Bill

wrote in message
hlink.net...
He's right, and jets don't maneuver or backup worth a crap at slow speeds,
and anything on the surface of the water at speed or gravel bars while not
at speed will ruin your whole day, impellers are between $250 to $500
dollars installed and you have to grease them with special grease after
every run.

Next time you see an O/B jet look at the foot and you'll see a hose making a
loop on the side, you disconnect that to grease you bearings than
reinstall. The O/B impellers are aluminum, usually stock, and gravel peens
the sharp impeller edges over and cuts down on it's efficiency, you can
take them off and sharpen them again, but the S/S impellers last longer,
but do vibrate a little more I think due to the weight increase. One thing
I've noticed is that my O/B doesn't cavitate near as much as my buds I/B.
The split clamshell that is on most I/B's is much more efficient when
backing up and during slow speed maneuvering because of the three impellers
and their in line flow characteristics.