BlackJack Performance Update
 

http://i1185.photobucket.com/albums/...ackJack004.jpg


I had a few people ask me for numbers on the BlackJack with the Yamaha SHO - so here they are! The boat was accidentally shipped with the wrong prop, so Kyle at Lake Area Marine had the correct one overnighted for me and I got to check it out today. Another big thanks to Kyle for getting me set up right. Once the boat is on plane the speed runs about even with the RPMs, for instance at 3500 RPMs I was running 35 mph. It cruised very nicely at 4000 RPMs doing 40-41 mph. Top end was 63.8 mph on GPS. The boat leaps out of the hole shot. I didn't have to touch the trim tabs and the boat was solid as a rock at WOT....not squirrely whatsoever. I was extremely impressed. If you're in the market for a new 4 stroke I definitely recommend checking out the SHO. It is a beast. The speed data I collected was with 1 person in the boat, all my fishing gear, and a half tank of fuel.

Man, it just keeps getting better and better!

Congrats!

Thanks. Needless to say I'm extremely satisfied haha. Now I finally get to make a real fishing trip in the morning!

That is a nice boat I bet that SHO kicks and gets

Best bayboat on the market IMO

That is getting after it. Sweet!

What prop did they send you?

I don't see a rope tied to the boat. Did u have to swim to get back in it? Haha. Nice looking boat though!

Shes a bute.

Glad to hear the new prop fixed the problem but I knew it would based on my performance in mine. By the way, where are you setting your jack plate?

Curious as to what your previous 3500 rpm(mph) numbers were with the original prop. What was your recorded RPM's at the 63.8 mph?

How much trimming and jacking (extreme amount or not much at all) did you have to do to reach this gps recorded speed?

That boat looks pretty sweet!

Beautiful boat man absolutely beautiful!!

Its amazing what the right prop will do. haha!

I'll try to answer all the questions in this post. The prop I am running now is a 15-21p Yamaha Saltwater Series 2. The prop that the rig was accidentally shipped with was a 13 3/4-21p Yamaha Reliance Series. I am leaving the jackplate all the way down on the #1 setting. I experimented with the jackplate a bit and have found that running it all the way down yields the best performance. At WOT I am getting 6000 RPMs. With the previous prop at 4000 RPMs I was running about 32-33. Now with the correct prop at 4000 RPMs I am running 40-41. When I got it up to 63 no jacking was necessary - I left it all the way down, i did not use any trim tabs whatsoever, and I only trimmed the motor up a little bit to let the boat ride the pad. The boat is extremely stable at all speeds and is very easy to drive. I got in my first chop with it today and it has a sweet ride. I could trim tab down and let the bow cut the swells or I could go fast and get on top. Both ways rode extremely well. The only boat I have been in that has a better ride and that I like better in general is a Yellowfin (yes I have been in a few different Haynies multiple times.....lol). Oh and I did not have to swim back to the boat....my rope was in stealth mode.

With the current 21p prop and a gear ratio of 1.75, you should be able to get more speed. With more trimming and maybe a touch of jacking you should top out around 68 mph. Looking at the numbers it looks as if your current slip percentage is down around 7%. Very nice.

Ive viewed this thread probably 8 times already just to look at that boat. Love it!!

I've never heard of the Blackjack running that fast with the 250 SHO. Fastest I have heard is 65. I think I can get there with a lighter load (no real need to...63 is fast enough for me lol). Raising the jackplate the slightest bit slowed me down. I had the motor trimmed as high as it would let me go. I mentioned before I only trimmed it up a little bit but the motor doesn't really trim that high. I definitely had a rooster tail going but I guess I am just used to trimming a lot more on my old boat with a 25 inch shaft compared to the 20 inch shaft now. Sorry for the misunderstanding. I only have 6 hours on the motor and have only opened it up about 3 times. I don't know what the nature of this motor is as it breaks in but I don't think it's going to get much faster. I am extremely happy with my current setup. The cruise performance is exactly what I have always wanted for Big Lake.

Lol thank you. I got my first couple jig head scratches on it today. I wanted to cry. It's going to be tough keeping the black looking sharp but it sure is fun to look at when it's clean!

You are absolutely right there!!! But man does it look good when it's clean!!

That SHO is a bad dude.Ran mine alittle yesterday. 51 mph was the most I got at 5700. I see alittle more but it was alittle choppy while I was playing.

Someone has said to take off trolling motor for another 3 mph gain . :)

Hahaha I am sure it would help but I didn't buy the boat to drag race. I am more than satisfied with the mid range performance I am getting. Maybe one day if I get the itch with a light tank of fuel I will take everything out of the boat and see what happens.

Is that WOT for you? I haven't heard what the Suzuki 250 is pushing the BJ wide open but I would have thought it ran mid to upper 50s?

specs say 6100 but I'd rather stay closer to 5700. Like you said not a drag boat and 50 is quick enough for me. Hole shots good and mid ranges quiet. Had the sound system installed yesterday and its crystal clear at 40mph.

:confused::confused: put the hamma down on that suki!!!! i ran my boat like a scalded dog , lol..... ya aint gonna run more then 20 miles max on big lake .... and thats a stretch.

let that boat perform!!!

jk man.
enjoy ur boat and the tunes!!!:work:

LOL - O I will in time! just finished the break in so still babying it little.

No boat runs at 0% slip.

You should be able to get a little more speed with that Zuk 250. I can run 53 at WOT in my 24 triton and the BJ is a lot lighter boat... I cruise at 40 most of the time too though

If 5700 is your WOT and specs say 6100 then I guess its possible that you have too much prop. Trim and jackplate will affect your RPM as well. I will admit though that I don't know a lot about props and proper setups. I just started learning since my BJ accidentally came under propped. If you can get it to turn 6100 WOT like the specs show, then i would imagine you will see better mid range performance as well. Like I said I'm not a pro at this by any means I'm just offering my opinion. Someone can correct me.

What type of sound and deck did you go with? I still have not made a decision about the type of audio I want to put in mine yet.

No doubt. You just realizing that?

To be honest 10% is pretty darn good of, 90 % of the props today or around 12-15% range depending on RPM I think the gear ratio is 1.83

You said his boat could top out at 68mph not I.

For audio, my boat is still at LAM right now, go and listen to the Fusion system that I had put in.

WetSounds and Fusion are bad arse

Want me to pick it up and break it in for you? :D

That Paul, what a prince of a fella!

Just doing my part to make the world a better place! :smokin:

Thanks I might do that

I agree there is no way it will go that fast. With no trolling motor and a few gallons of gas I think I can get 65 out of it. That's not practical though. The speeds I recorded were with a useful load. I had a full tank of fuel with two people in the boat on Wednesday and saw the exact same cruise performance and 61 mph on the top end.

I brought it to Baileys. Sony Marine deck, JL 4 channel amp, 4 JL 7.5" speakers. 2 in the front storage boxes and 2 in the rear.

I bet that thing sounds as sweet as it rides!

Might be a false statement right there. When the question is asked," I wonder what this boat/motor top end speed is"? The math indicates your current combination should reach the previously stated speed. How a person gets to that mathematical descripted speed is up to the individual. Then again a person may ask the above question but never really intends to find the true top speed of the boat/motor combination. To each his own.

Its does! louder than I can to listen to it..LOL

What did he just say ????

I guess it is possible under perfect conditions but that would be with an empty boat running on fumes with a tailwind. I would be really surprised to see 68. After running it a bit I believe 65 is definitely reasonable and achievable with a very light load.

Yea I had to read it a couple of times but I think I got it lol