Prop Re-Pitch: Anyone In Anchorage?
Anyone in Anchorage that can re-pitch a prop?
I use Piranha
Can change my pitch in a couple minutes
Yah, I already have a Piranha for when I go up into shallow water. I am looking to get one of my stainless props re-pitched.
Originally Posted by alaskapiranha
Is it possible?
Isn't the pitch the fixed blade angle? How would you change that? I'm a boating newbee, so I'm just curious.
Someone really good with pliers I'm sure they have machines to get the pitch changed properly in all the blades. A manager I work with used to run a prop shop in anchorage, I'll see if he knows of any.
Just talked to my manager. He said A-1 prop in anchorage 344-prop can do it, but you're limited with what can be done on outboard props. You can't change the pitch at the root, so effectively only re-pitch the last 1/2 to 1/3 of the blade. You can add an inch of pitch, but adding 2 inches is pushing it. Some props are made out of junk alloy so aren't valid candidates.
Yup, I called them this afternoon and I found they can reduce the pitch one (1) inch too.
Originally Posted by Paul H
I have a Raker 14.5" x 20" pitch that is just a little too much for my boat. I can get 5150-5200 rpms out of my 175, so all I need to do is pick up another 200 rpms and I think it'll work well. I am trying out a Viper 14.75" x 19" pitch that I feel is working quite well, I can get 5400 rpms from it, and good fuel economy, but it just doesn't have the bow lifting ability of the Raker.
I had A-1 Prop re-pitch a 30 hp outboard prop once. It was a new brass prop that was as flat as I could get at 13" pitch, but I had them beat it down to about 11" to push an inflatable cataraft. Before they did their stuff I could not get it up on step unless traveling very light. I couldn't get enough RPMs, to develop any power. Afterwards, I could get it up with just about any reasonable load. It wouldn't go quite as fast when the boat was empty, but the rest of the time it was great. I was impressed.
This engine worked great as a kicker motor on a large boat too. Weighed about as much as a 25hp, but pushed the big boat like it was a 50hp.
A1 did a great job, no vibration or cavitation issues, just a great performance boost. Stainless, of course, is more difficult to work with.