I am curious what you guys are getting for speeds on 1872 flat bottom boats with 30" sides?
i just picked mine up and bought a 2001 Johnson 115hp 2 stroke. I am having issues with proposing around 35mph. I have raised the motor up on the highest bolt holes on the transom and the cav plate in reference to the bottom of the is about perfect. I am getting very little wash over the plate and its about 1 to 1.5" above the bottom of the boat.
The prop i am using is a Solaris 3 blade 13.25x17 and getting about 4900-5000 RPMs out of it that is WOT with the trim all the way down. I can bring it up a hair or two and its starts bouncing really bad so i get out of it. I have another prop that is kind of buggered up it was a 13.25x15 pitch but i only gained a appx 200 RPM (i think it was larger over all diameter 13.75x15) and still had issues with the porpoising.
I put a no-drill hydrofoil on that i had laying around for ****s and giggles. it just made it hard to steer and didn't help at all but the motor was also mounted lower in the water. I know a foil is a band-aid for the most part anyways.
Anyone been down this road care to share your setup?
My setup is a Alweld Flat bottom 1872 30"
2001 Johnson 115 2 stroke
24 gallon fuel cell in the back
3 trojan group 31 battery in the back
2 trojan group 31 under the front deck
it has a plywood floor and front deck currently until i can swing the purchase of my new welder.
i just picked mine up and bought a 2001 Johnson 115hp 2 stroke. I am having issues with proposing around 35mph. I have raised the motor up on the highest bolt holes on the transom and the cav plate in reference to the bottom of the is about perfect. I am getting very little wash over the plate and its about 1 to 1.5" above the bottom of the boat.
The prop i am using is a Solaris 3 blade 13.25x17 and getting about 4900-5000 RPMs out of it that is WOT with the trim all the way down. I can bring it up a hair or two and its starts bouncing really bad so i get out of it. I have another prop that is kind of buggered up it was a 13.25x15 pitch but i only gained a appx 200 RPM (i think it was larger over all diameter 13.75x15) and still had issues with the porpoising.
I put a no-drill hydrofoil on that i had laying around for ****s and giggles. it just made it hard to steer and didn't help at all but the motor was also mounted lower in the water. I know a foil is a band-aid for the most part anyways.
Anyone been down this road care to share your setup?
My setup is a Alweld Flat bottom 1872 30"
2001 Johnson 115 2 stroke
24 gallon fuel cell in the back
3 trojan group 31 battery in the back
2 trojan group 31 under the front deck
it has a plywood floor and front deck currently until i can swing the purchase of my new welder.