300/440/550 650 conversion Ski - Jetting Question

[Kalwren]

Hi folks,

Looking for a little help as to where to start. This isn't a skill I have yet, so I'm looking for assistance.

I have a 650 conversion ski with a 44 Mikuni carb. I'm using an 18 degree impeller with an engine thats been mildly ported for the top end. It's the silver 650 engine. I have 155 PSI in the front and 150 in the rear.

What would be a good high and low jet to start with? Suggestions please?

Thanks in advance!

 

[u887266]

120 low and 150 high

 

[Kalwren]

120 low and 150 high

Thanks for the response. I'll try this.

 

[kevbo]

An 18 degree prop? Try a 15-15.5.