It is currently Thu Mar 28, 2024 7:09 am




Reply to topic  [ 1 post ] 
 22HP Predator on JB SD Gear and Prop help 
Author Message
MMT Member

Joined: Fri Jan 05, 2018 6:57 am
Posts: 4
Post 22HP Predator on JB SD Gear and Prop help
I am new to surface drives, and recently bought a used JB mud motor with a 15 hp Lifan and a 9x7 prop. I haven't pulled the lower to count the teeth on the bottom sprocket, but the ratio is roughly 1.1:1. The 9x7 pushes the baot about 16 mph with me, and about 10 MPH with 2 people and gear. I need more speed and had issues with the 15 HP, so I replaced it with a 22HP predator. The 9x7 (which is fairly worn) cavitates with the 22hp. I have ordered a Hill Marine 11x10 SD prop in hopes to resolve this.

My question is this:

With the stock 22HP, 1.1:1 ratio, and 11x10 am I likely to have to lower the gearing in order to turn the necessary RPM? If so, what ratio should I try?

Thanks in advance for any advice.


Fri Jan 05, 2018 7:07 am
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 1 post ] 

Who is online

Users browsing this forum: No registered users and 136 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: