Hamilton jet 212 nozzle postion

[SLEDDER]

What are the advantages, disadvantages for the nozzle to be tilted up or straight with the centerline of pump impellor? I was looking at the print of the pump and I noticed you can put the pump nozzle in either of the two positions. Thinking of the physics of the up position, tells me you would lift the bow quicker, by pushing the stern down.:shrug: Anybody have experience with this?

[namu mac]

Don't know about the Hamilton, but I had a 3 stage Kodiak with the nozzle pointed down. Kem Equip. told me tha the rpms might decrease if I turned the nozzle over. I did. I took about a block for the boat to get up on plane and it had NO power! All the thrust was going up and not pushing the boat. In your situation try it and see.:twocents:

[willierower]

Does it tell you how many degrees of angle it is in the up position? By changing the thrust angle up a bit you may loose some hole shot, you main gain some top speed and lower your cruising rpm's Your steering may feel a little washy at higher speeds. You will just have to try it to see what happens. I doubt you will notice a lot of difference.

I have lots of experience in tuning the thrust angles and such but thats with high performance race hulls and pressure pumps with long race nozzles.... Here is what I know

Too much wedge.... You wont get up on step. And if you do. the boat feels like it going to take off and it doesnt really want to turn.

Not enough, you go slow but you can turn really well.

The right amount...... You go fast and turn well...

There is a fine line between too much and not enough. 1 degree of wedge can make a huge difference.

All the stuff I know about making a race boat go doesnt apply to fishing/pleasure boats. A race boat hauls pretty much the same amount of weight all the time. Fishing boat haul all kinds of different weights.

[Marines511]

found that the 8 degrees works better on heavier boats or when just not getting enough rpm