Twin 140 4Stroke Suzuki's
 

Thinking of putting twin 140 4Stroke Suzuki's on the back of my 23 Seacraft. Just wondering what kind of cruising speed I should expect and at what RPM's, fuel consumption, and WOT. Oh yeah, how much money would two engines cost me. Thanks for any input.

Re: Twin 140 4Stroke Suzuki's
 

FINSTER!!!!!.. sounds like a question for Finster...

Re: Twin 140 4Stroke Suzuki's
 

I think the Suzukis go for like $8000 a piece. While we are on this subject, I heard that the Suzukis and the Yamaha don't stand up to the saltwater all that good. Any comments on this from anyone?

Re: Twin 140 4Stroke Suzuki's
 

I don't think I would hang twin 4 strokes on the back of any 23' boat unless it had a large floatation bracket along the lines of a hermco or something of that nature. Your sculpers will probably be permanently underwater, and the boat at rest is going to sit real low in the back.
One Suzi 140 is 410 pounds. My 250 Merc is 472 pounds. 820 pounds is alot of weight to hang off from the back of a 23' boat. I would want at least 400 pounds of positive bouency underneath them. A buddy of mine has them on a 23' boat and gets around 3 mpg cruising at about 27 mph. As far as reliability, the suzi's and yami's that I know about seem to hold up pretty well. All manufactures make a bad motor or a whole bad lineup/year from time to time (Merc, 'Rude, and yes even Yammis). Unforutnately, if you buy a new one, you won't know until it is too late (lol).

[ August 22, 2003, 01:42 PM: Message edited by: JohnB ]

Re: Twin 140 4Stroke Suzuki's
 

Well, as far as economy my DF 115 runs on air. I don't know how many GPH or MPG's it gets but it's alot.

As far as curosion goes I don't think it's worse that anything else. This is my third season and it seems to be holding up pretty well.

Re: Twin 140 4Stroke Suzuki's
 

The corrosion thing is on older Suzuki engines, the older four strokes I looked at were no worse off than anything else in saltwater. My new 140 (85 hrs. since July 3rd.) has the luxury of living on a trailer and gets soap and water after every use no wories here [img]images/icons/grin.gif[/img] . Like Finster said they use no gas I put 12-15 gallons in my 20' every ten engine hours I'll post the exact fuel numbers in the near future. I just gassed up tonight and gas went up ten cents a gallon this week super was $2.03 [img]images/icons/shocked.gif[/img] at the Mobil. I was really loving this engine when I saw the gas prices this week, they love to nail you for Labor day week end. Great engines [img]images/icons/grin.gif[/img]

Re: Twin 140 4Stroke Suzuki's
 

Trevor, Let me fully answer your question as I am the only one with a 23 with twin Suzuki 115 4 strokes on the site. Getting out of the hole with the 115's is no problem. I had 8 people on my boat 4th of july and she just came up beautifully. With 3 people on board she cruises at 4000 rpm's at 25.5 knots. At that speed she burns 10.5 gph for a net of 2.9 mpg. Efficiency is maintained from 3500 to 4500 rpm's at the same mpg so I don't suffer if I want to kick it up to 29 kts or so. At WOT I am running 5950 rpm's trimmed high and my speed is 37 kts, maybe 38 1/2 with the wind. I run 23 inch Suzuki aluminum props.

As you all know I put a bracket on this year and went with a Mattson & Co flotation bracket with a swim platform. The chamber is 42 inches wide. The boat sits well in the water but she's no self bailer. In the "If I had to do it again" department I'd have them fabricate the chamber so it was 10 inches wider to offer about 20% better flotation. I also carry 150 gallons of fuel so if I replace it with a 100 gallon tank I may gain an inch or 2 at the waterline. I would not recommend going with twin 4 strokes on the transom. In any kind of following sea, you will get water coming over the back.

The bracket makes the boat really ride so much better. It feels bigger, more solid and the ass end stays put in the water where without a bracket in 4 ft seas's I was coming completely out of the water. The full transom also offers your passengers extra stern room for a smooth ride sitting in a deck chair.

Finally I have a 1999 Suzuki 4 stroke on my flats boat. There is absolutely no corrosion. Those 140's should add 3-4 kts at top end and maybe 1-2 kts at cruise so don't plan on there being much if any extra fuel burn.

Re: Twin 140 4Stroke Suzuki's
 

Have you thought about the new Suziki V6 line that will be arriving soon. They will feature a true 250hp V6 with variable timing. At only 580lbs it is lighter than the yahama 225. According to the press and what I have seen at a recent boat show it will be the most advanced outboard arround. Check out the web page. http://www.suzukimarine.com/sr04/df250/

Re: Twin 140 4Stroke Suzuki's
 

Here is a link to the Suzuki test page w/twin 140's.
I was looking at the 250 for my 23WA, but I am not that impressed with the fuel consumption. I was hoping for better results. I know I will have to repower one of these days as I am running a 1989 Merc 200hp now.

http://www.suzukimarine.com/boatbuil...eWeekender.php

Re: Twin 140 4Stroke Suzuki's
 

Gary, Not that impressed with the fuel consumption???????????????? What are you accustomed to, putting a sail up every time you want to move? All kidding aside, I get over 3mpg with my 2 115 suzuki's. Trolling probably over 5-6mpg. Look on the suzuki website, the 31 Yellowfin(made in Sarasota) achieved 2.05mpg burning 15.6 gph at 32mpg at 3500 rpm's. A recent powerboats report listed an intrepid with twin ficht 250's and the best it could do was 1.6 mpg.
P.S. The only boat I would ever trade my 23 SC for is a 36 Yellowfin with 3 250 suzuki's.

Re: Twin 140 4Stroke Suzuki's
 

I run a 200hp carbed Merc and burn about 12gph @ 4200 RPM / 31-32 MPH. There is just too much junk in the water to run faster, plus dodging crab/shrimp pots and gill nets.
I was really hoping to improve the gas consumption on repowering. Maybe, down to about 8 GPH. Do you think that is possible? The 200 does just great for power. I can run about 42-43 wide open very seldom to that and only for short time.
I use a 15 hp Honda for trolling.
I looked into the Suzuki 250 because of the variable valve system. I just figured it would run with the Optimax's fuel figures..
I ran into a friend at the ramp yesterday and he was launching his 22 Whaler, just put on a new 225 Optimax. Has just 4 hours on it. It really sounded great. I'll keep in contact with him to see how he does with it.

[ September 10, 2003, 12:08 PM: Message edited by: Gary ]

Re: Twin 140 4Stroke Suzuki's
 

Gary,

I find it amazing that some of the guys on this board are having trouble with there new opti's. What I mean is they complain about top speed, hole shot, can't seem to find the right prop etc. You are getting 32mph at 4200 rpm's and the factory #'s for the new seacraft 23 with a 225 opti barely tops out at 35mph. What prop are you swinging?

Re: Twin 140 4Stroke Suzuki's
 

Briguy, I don't know about the other guys on this board complaining. I just mentioned a friend had launched his Whaler w/a new 225 Optimax and I loved the sound of it.
I am running a 1989 Seacraft 23WA with a carbed Mercury 200 Hp. It has a 14 1/2" X 17" prop, Quicksilver part # 48-78118A40. Measued test speed by Mercury was @ 3795lbs 44.7 @ 5725rpm/
4245lbs 44.0mph@5700 rpm. It has trim tabs, hydralic steering and StingRay fin & 115 gal fuel tank. I still get about the same results, there has to really flat water w/ust a ripple and well trimmed to get 5700 rpm.
The info is from Mercury bulletin NO:88-128 1/13/88. [img]images/icons/grin.gif[/img]

Re: Twin 140 4Stroke Suzuki's
 

Capt. Brain,

I am running a pair of 1999 150hp Opti's on my 25' SeaCraft and I really like them. I am NOT a fan of Mercury though. If it wasn't for the fact that you can't buy a SeaCraft without one, I wouldn't have even given them a chance.

I just got it back from the shop (9-13-03) and I will say they expensive to repair. One of the fuel rails had an internal air leak-$800 for one fuel rail. The total bill was $1400!

Here is what I'm doing;
4000 rpm-1.8 mpg-30 knots
3000 rpm-2.5 mpg-24 knots
Max rpm 5000-just over 1 mpg-36 knots

It beats the pi$$ out of a buddy of mine's Glacier Bay. 1.2 mpg on smooth flat day.

Re: Twin 140 4Stroke Suzuki's
 

Doing away with the twin 140's on the back of the 23CC Seacraft. Final decision is the new 250 4Stroke by Suzuki. She should run well with that motor, plus, we wont have to worry about all that extra weight if we were to go with two motors. Looking forward to the boating season.

Re: Twin 140 4Stroke Suzuki's
 

Trevor, I like your choice. Keep us posted.

Re: Twin 140 4Stroke Suzuki's
 

I've got twin 115 4 stroke Suzukis on my 23 Sceptre and I like it. We travel `10-30 miles out or more and we don't have any towing service to my knowledge here. Its a nice feeling that I can come back to port if I have a problem. Fuel efficiency is good. Weight on the transom isn't a problem for me so far.

Hope you are happy with your choice and great fishing to you!

Re: Twin 140 4Stroke Suzuki's
 

Good luck Trevor. You will be the first on the site with a Suzuki 250 4-stroke.

Re: Twin 140 4Stroke Suzuki's
 

Well fellows, we picked up the 23 Seacraft with the new 250 four stroke Suzuki up on Friday and it was in the water by Saturday morning. Cannot get over the difference between our old 225 two stroke and this new bad boy. Here are the numbers with the 16X20 prop.

198423CC Seacraft 250 Suzuki 4Stroke
70 gallons of fuel
3 people

3700-23knots-7gph
4200-26knots-9gph
4500-29.9knots-11gph
5000-34.5knots-12.5gph
5700-38knots-have to look at flow scan
6100-40.2knots-have to look at flow scan

In conclusion, the new 250 four stroke is much faster and fuel efficient than the 225 two stroke. To give you an idea, top speed with the 225 two stroke was 34.7 knots compared to 40.2 knots with the 250 four stroke. Oh yeah, hole shot is ten times better. That sucker has soooo much torque to go along with the 16X20 prop. Only good things to say about this new motor.

Trevor Hicks

Re: Twin 140 4Stroke Suzuki's
 

Just wanted to give a quick update after changing props this past weekend. Changed from a 16 X 20 to a 16 X 21.5. This was with 2 people and 80 gallons of fuel.

3700- 25 knots
4000- 27.5 knots
4200- 29 knots
4500- 32 knots
5000- 36 knots
5500- 39 knots
5950- 42.3 knots

Re: Twin 140 4Stroke Suzuki's
 

Thanks Trever
Looks like approx 3 mpg at crueising speed. That would give me 360 mile range on my 23CC if a ever switched like you did.
FellowShip [img]/images/graemlins/cool.gif[/img]