Jason Dismukes
Member
Hi all,
Thought I'd post the latest pics of the boat
Devlin BB3
- Thread starter Jason Dismukes
- Start date
Hi all,
Thought I'd post the latest pics of the boat
Phil Nowack
Well-known member
EXCELLENT! Does your Chessie approve?
Jason Dismukes
Member
Phil,
Yes he does. Though the maiden voyage was only 3 weeks ago and 2nd was on Saturday. There are a few things to tweak and improvements to make. It's not reaching the rpm range at WOT. So I may have to go down in pitch on the prop.
Yes he does. Though the maiden voyage was only 3 weeks ago and 2nd was on Saturday. There are a few things to tweak and improvements to make. It's not reaching the rpm range at WOT. So I may have to go down in pitch on the prop.
Phil Nowack
Well-known member
What kind of speed are you getting out of that 40?
Jason Dismukes
Member
I think around 20-25. It should do way better than that. Saturday me and hunting buddy went out and had the boat under "full load" and at WOT was only getting up to 3000rmp. Now it was running and sounding great but that's where I would expect it to be with this boat. This thing should fly.
Jason Dismukes
Member
Thanks Carl. It's been a real labor of love.
Jason
Great looking rig.
I thought I was the only person running a shorty forty on their Black Brant. Mine is the BBII and is a slower hull than the BBIII. GPS has me at 37/38 mph with a medium load. If you are only getting 20-25 something is not right. You should see 40+ from that set-up. Let us know what you find out.
Eric
Great looking rig.
I thought I was the only person running a shorty forty on their Black Brant. Mine is the BBII and is a slower hull than the BBIII. GPS has me at 37/38 mph with a medium load. If you are only getting 20-25 something is not right. You should see 40+ from that set-up. Let us know what you find out.
Eric
Jason Dismukes
Member
Hi Eric ,
Thanks for the reply. Yes I was expecting 40 easy. I have a 12 pitch prop on it. But I'm not sure going down on pitch will make that much difference. It's a brand new 2 stroke also.
Thanks for the reply. Yes I was expecting 40 easy. I have a 12 pitch prop on it. But I'm not sure going down on pitch will make that much difference. It's a brand new 2 stroke also.
Geo Kaiser
Active member
Jason did you have it trimmed up?
Seems like you should be getting way more speed
Seems like you should be getting way more speed
Jason Dismukes
Member
I had the motor trimmed down. Most of the time while running. But that still doesn't explain it. I'm going to call the tohatsu rep and talk to him about it this week.
Capt J. Stieben
Active member
Jason,
I don't have a devlin but I have owned a number of tiller boats the trimming it up at times would easily get me extra 750 plus rpm even more depending on original height. Also the prop, you should with a two stroke have enough power at the low end to push a prop with a lot of bite that should make that thing fly.
Just my thoughts.
I don't have a devlin but I have owned a number of tiller boats the trimming it up at times would easily get me extra 750 plus rpm even more depending on original height. Also the prop, you should with a two stroke have enough power at the low end to push a prop with a lot of bite that should make that thing fly.
Just my thoughts.
Phil Nowack
Well-known member
I am guessing that with the inserted motor, you have problems turning while trimmed up....
Geo Kaiser
Active member
You answered your own question, if it's trimmed down your pushing the nose down creating more resistance.
You'll probably pick up 2,000 rpm if you play with it
You'll probably pick up 2,000 rpm if you play with it
To get the most from mine I hade to raise the motor just to the point of blowout and trim it a bit as well. In turns blowout was a problem until I switched to a four bladed prop. I think it is a 14 pitch but am not 100% sure. I do know that even when misconfigured I was getting a lot better than 20-25. That really seems odd given the hull, weight, and hp.
Jason Dismukes
Member
Hi all,
Thanks for your comments. I do trim it up some of the time when running. The anti cab plate is about an inch below the keel. When trimmed down I have pretty much full range of turning but not when trimmed up. In early spring I will definitely be cutting the corners off the sponsons. I still don't think this explains the low rpms. I'm going to have to play with it for sure.
Thanks for your comments. I do trim it up some of the time when running. The anti cab plate is about an inch below the keel. When trimmed down I have pretty much full range of turning but not when trimmed up. In early spring I will definitely be cutting the corners off the sponsons. I still don't think this explains the low rpms. I'm going to have to play with it for sure.
Jason Dismukes
Member
Tod,
Thanks. You're close to me. Maybe in warmer weather we can get together.
Thanks. You're close to me. Maybe in warmer weather we can get together.
Huntindave McCann
Well-known member
Jason,
I am surprised that you are running trim tabs on your hull. Did you run this motor and hull originally, without hull tabs? I suspect the trimming of the motor will not have as much effect with the hull tabs, as trimming the motor will have with out hull tabs.
On a hull without trim tabs, trimming the motor will tend to raise the bow. I don't see this happening with hull tabs in place. I would expect and rise in the bow will be minimal at best. I might suggest removing or folding the hull tabs up vertical and then playing with the motor trim. You may want to try all possible combinations to get a good data base for future changes, such as prop pitch, motor height and trim position (both motor trim and hull tab trim).
Now keep in mind, I could be all wet. My experience with hull trim tabs is limited at best. So if I am way off base just ignore my comments. :>)
I am surprised that you are running trim tabs on your hull. Did you run this motor and hull originally, without hull tabs? I suspect the trimming of the motor will not have as much effect with the hull tabs, as trimming the motor will have with out hull tabs.
On a hull without trim tabs, trimming the motor will tend to raise the bow. I don't see this happening with hull tabs in place. I would expect and rise in the bow will be minimal at best. I might suggest removing or folding the hull tabs up vertical and then playing with the motor trim. You may want to try all possible combinations to get a good data base for future changes, such as prop pitch, motor height and trim position (both motor trim and hull tab trim).
Now keep in mind, I could be all wet. My experience with hull trim tabs is limited at best. So if I am way off base just ignore my comments. :>)
Jason Dismukes
Member
Hi Dave,
I have not run it without the trim tabs. With the tabs on, this boat gets on plane very easily even when they are all the way up (level with and about 3/8" up from bottom). I planned to use them from the very beginning. I'm a little heavy in the stern with the 40hp and batteries. They give you a lot of planing surface and each side is adjustable from the console. If the boat is unbalanced you can use the tabs to level the boat.
In my exerience, with the motor trimmed the bow will pop up when you are taking off. When you plane off, trimming the motor up will usually suck the bow down even more. I typically will start off trimmed down then trim up once on plane.
I have not run it without the trim tabs. With the tabs on, this boat gets on plane very easily even when they are all the way up (level with and about 3/8" up from bottom). I planned to use them from the very beginning. I'm a little heavy in the stern with the 40hp and batteries. They give you a lot of planing surface and each side is adjustable from the console. If the boat is unbalanced you can use the tabs to level the boat.
In my exerience, with the motor trimmed the bow will pop up when you are taking off. When you plane off, trimming the motor up will usually suck the bow down even more. I typically will start off trimmed down then trim up once on plane.