Tsunami/bracket power options

[Dave Hirshberg]

My 23 sceptre went 119 nautical miles( nearly 2mpg) on 65 gallons of fuel with a single carbed 225 johnson Runner back when I owned it in 3 to 5's most of the way. I had a 100 gallon tank. I have twin 150 Fichts on my 25 now and I get 1.7KMGP with those dinosuars. I compeletley understand the desire for twins and would seriusly look at 150 ETEC's if I were looking again. The local Coast Guard and Marine patrol here are uing them and I've heard very good things about them. They have great warranty's too. I like the low end torque they have over most 4 strokes. I ran a 23 with 140 Zukes in Nicaragua and it ran well but was much louder than I expected at cruising RPMS ( 5000 rpms). It could have been underpropped though. I run my 150's at 3500 getting 26kts and they are hardly working and burn nearly no oil at all even though they are 9 yr old motors.

[JohnB]

Hey JohnB, I'm 90% sure that's my old Sceptre in your post.
If it is, how's it doing?? I sold my 32 and am looking into another Sceptre. The 32 was fun, but I still like the 23 better.

That would be the one. She is getting ready for a bracket and transom fill in. Had a few problems with the top cracking, but finally got someone that knows what they are doing to fix/re-engineer it. All new electronics too.

As for the twin motor, I haven't heard of anyone going from an efi, dfi, or 4 stroke single 225+, to twins, that has gotten better fuel milage. IMHO, single biggun with seatow and a satilite phone is the way to go.

[Jaizzen]

Bayou,


I have a 72 Tsunami with twin yamaha 150's (that easily push my boat on one motor 20kts), a full hardtop and a 150 gallon fuel tank. Sounds alot like what you are trying to do. I acually have mine transom mounted with no extra floatation. No issues in following or head seas. I did however raise the transom.

I dive and fish 100 miles off shore in it and run it in spearfishing tournaments loaded to the hilt and have no trouble with weight. I too am looking for newer power and have looked real hard at the DF140's. I just don't think they have the balls needed to get it done. The DF150's seem to be the best choice from everything that I can find. The E-techs are great lightweight motors, just pricey by comparison. I've recenetly considered a single DF300 with 30" shaft with a small 8hp 4sroke kicker mounted in the cabin. Is there anyone outthere running twin 150's 4 strokes on a Tsunami?

In addition, I would not push your fuel tank towards the transom to offset the weight of the hardtop. It's not necessary, secondly, if you put twins on your boat you will have plenty of weight aft. I actualy pushed my tank 8 inches forward and have been very happy with the results. I rarely use tabs even in seas. I keep reading about twins on a 23, but its mostly from the guys with Center consoles that don't take into account the amout of weight a Tsunami has forward. An apple to an orange in my opinion.

Looking forward to running into someone with a twin 4s setup. If not, I guess I'll be the first.

Best of luck.

Jason

[Fr. Frank]

Jason, I saw a classic 23' CC Saturday on the Homosassa river that had twin 4S 150 Yammies on the back, that were transom mounted. From how the boat rode in the water at idle, I'm guessing he had the transom raised, as he had about 5-6 inches of freeboard at the transom. Very quiet, even when he shoved the throttles and planed off. Never got to talk with the guy.

[1bayouboy]

Jason,
Where did you get your 150gal tank..??....and what were the dimensions?? I'd like to get at least 130gallons...
maybe a little more if I can fit it in.

/d

[Jaizzen]

Sorry, I haven't logged on in a while and didn't see your question.

I think the tank came from local guy in St. Petersburg FL. I'll see if I can dig up the specifics for you.

Best of luck with your rebuild.

[1bayouboy]

Thanks. No worries...things were moving slow due to work...now they're stopped due to a cut extnesor tendon in my left thumb.... I keep adding to the fleet....looking at a 25 Seafari twin I/O.....