[lowsodium]

I have been a V-drive guy for a few years. Now I find myself with the opportunity to race a sprint jet boat. It has a 773 Hamilton pump with a T3 nozzle. Any guru's on here? I need to do some upgrades to this pump, it has bronze impellers currently.

 

[Huffa]

What motor are you running? What is expected HP? I am not a guru but I would say to ditch the T3 nozzle and change to a Scott or something along those lines. Also you are going to need some good blades, a bullet or screw in the front I would think.

 

[lowsodium]

Where do I get impellers for this pump? I have heard there is an upgrade for the T3 nozzle, but don't know what it is or where to get it. Engine will be 500+HP

 

[aussiesmokinjoe]

Go stainless impellers and have the first impeller pitched for maximum pickup and the other two pitched equal for speed. I'm sorry I can't give you impeller pitch setting for a sprint boat because I am running my Hamilton on a 21 eliminator and it will be set up different.
Scotts do nozzles and inserts for fine tuning.
Keep the 773 because the Scott's only come in a two stage.
I have brass and stainless impellers depending if I want speed or just a weekend ski.
The pump is very simple to work on.
Also depending if you have a 773 or a 773r. You need to tune a 773 to handle a maximum WOT of 5000 because they fall or shake apart. I have the 773r the bearings are oil bathed and handles a greater rpm.

 

[aussiesmokinjoe]

Where do I get impellers for this pump? I have heard there is an upgrade for the T3 nozzle, but don't know what it is or where to get it. Engine will be 500+HP

Get everything from Scotts.
They sell everything you need from impellers to nozzles.
I have got all my parts there even bearings.

 

[Huffa]

If you want to talk to someone who knows all there is to know about Hamilton units contact Ian Coleman at Coleman Marine and Performance here in NZ. His email [email protected]. He will see you right. He is a Hamilton agent and has worked with these units for a long time. He knows how to get the best out of them and whats required to make them perform.

 

[aussiesmokinjoe]

I hope this is some useful information.
I have been going through Hamilton nz but Scotts do exactly what I wanted at half the cost. I am a happy customer and the results are fantastic.

 

[lowsodium]

Thank you all. Mel

 

[jetboatperformance]

I have been a V-drive guy for a few years. Now I find myself with the opportunity to race a sprint jet boat. It has a 773 Hamilton pump with a T3 nozzle. Any guru's on here? I need to do some upgrades to this pump, it has bronze impellers currently.

These are amazingly strong , durable and simple jets to work on and repair , with the exception of bearing/shaft press work they even are "field serviceable" with some basic hand tools and very user/DYI friendly Tom

 

[aussiesmokinjoe]

These are amazingly strong , durable and simple jets to work on and repair , with the exception of bearing/shaft press work they even are "field serviceable" with some basic hand tools and very user/DYI friendly Tom

That is exactly true. When we go to the lake (tomorrow yes!!!) I take my tools lmpellers and nozzles with me.
If it takes me longer than 20 minutes to change the impellers and nozzle I have done something wrong.
I'm a simple person and I like simple things lol

 

[lowsodium]

OK, no fear, just tear stuff apart. Here is what I found.