Suzuki 250 4 stroke
 

Well the timing was finally right so I decided to take the plunge and do the most expensive up grade you can do to your boat... buy a new engine! :D

My brother works for a crane company so we mounted it at his shop. You may notice that these are the same two guys that are in the fishing pic's I posted a while back. I set them up for this little task by taking them fishing. :D The motor arrived and in less then 2 hours we had it bolted to the boat. It's going to the local dealer next Tuesday to complete the rigging. Here's some boat porn.

motor in crate:
http://www.casdvm.com/photos/suzuki%20250/DSCN5079.JPG
http://www.casdvm.com/photos/suzuki%20250/DSCN5080.JPG
http://www.casdvm.com/photos/suzuki%20250/DSCN5081.JPG
http://www.casdvm.com/photos/suzuki%20250/DSCN5082.JPG

the rigger:
http://www.casdvm.com/photos/suzuki%20250/DSCN5084.JPG

at home:
http://www.casdvm.com/photos/suzuki%20250/DSCN5088.JPG
http://www.casdvm.com/photos/suzuki%20250/DSCN5089.JPG

Re: Suzuki 250 4 stroke
 

:D :D :D :D

Why is the vent out of the port side?

Re: Suzuki 250 4 stroke
 

The ultimate combination!!! Please post performance #'s when you get them.

Re: Suzuki 250 4 stroke
 

plastic cheap vents that keep breaking at the dock. I'm going to have some custom ones welded when I get the chance.

strick

Re: Suzuki 250 4 stroke
 

Pretty soon you are going to run out of things to do on the boat and will be forced to just go fishing ALL THE TIME instead.

How’s that bracket holding up? From the pictures it still looks pretty good and solid.
I filled in those holes with glass and solved that problem.

Enjoy life is short.

FellowShip

_______________________________________________

My motto: Just for the Grins :D

Re: Suzuki 250 4 stroke
 

Your gonna love that motor :cool:

Re: Suzuki 250 4 stroke
 

Sweet - You're my hero...

Re: Suzuki 250 4 stroke
 

Thanks guys

Fellowship- the bracket is holding up fine. I retightened the bolts when I took the old engine off the other day. Hopefully the new zuke wont take a dive into the drink on her first test run!

strick

Re: Suzuki 250 4 stroke
 

Fellowship - Just ask Strick if he found another Seacraft to work on yet. . .

Re: Suzuki 250 4 stroke
 

I have that same motor and you are going to love it! They dyno out to 268 hp and they use all of them on the cheap. Propping is the key as is with any motor. Mine is swinging a 23p Mercury Revolution 4 and still bumping the rev limiter with a light load. Large diameter and blade width is key for the tall gears in these big Suzies. Good luck.

Re: Suzuki 250 4 stroke
 

What kind of boat are you running your motor on?

Re: Suzuki 250 4 stroke
 

1974 24' FleetCraft Express. It is a splash off of a 24 Formula. She is probably not quite as heavy as a Tsunami, but close with similar deadrise. Loaded with tanks, ice, and dive gear she can hit 47 knots and at 33 knots she gets close to 2.2 gpm nautical. http://www.classicseacraft.com/forum...0252#Post40805

Re: Suzuki 250 4 stroke
 

I've had the boat out with the new motor several times now so I'm just past the 10 hour break in period. So Far I LOVE THIS NEW MOTOR. Everything that has been said about it is true. I only have a tach right now. The Navman is still on back order but hopfully I'll get it mounted soon so I can give some fuel burn numbers. Heres what can tell so far: 16x18.5 ss prop with 3 big guys jumps on plane in about 2 seconds. Cruises 28 knotts at 4300 rpm; 36 knotts at 5900rpm. The other day I hit 38 knotts at 6000rpm and bumped the rev limit indicator. Motor went into safe mode. That was with two adults and two children on board. I'm postitve I can hit 40 knotts if I stay at high speed longer then 30 seconds and play with the trim/tilt. Forgive me but Speed has never been my thing. This motor has more then enough power for the 23 hull. You cannot hear it running at idle, and at cruising speed you can talk to each other without yelling like the old 2 stroke. No smoke what so ever. The boat sits about the same in the water as it did with my old motor (weight difference: 522 for the yamaha 250 vs 580 suzki 4 stroke) It takes a little while to get used to the new sounds that the boat makes with this motor. So far I cant say enough good things about it. The only negative thing I've experienced so far is that the boat wants to porpoise slightly once in a while but that is easiy trimmed out. It's mounted on the 2nd hole. I'll post a full range of numbers when I get the navman installed. Here are afew pic's from the other day. My son was starting to get pissed because his sister had caught two fish and he had not caught any..... then bingo!

http://www.casdvm.com/photos/suzuki%20250/DSCN5172.JPG

driving the boat around: http://www.casdvm.com/photos/suzuki%20250/DSCN5173.JPG http://www.casdvm.com/photos/suzuki%20250/DSCN5175.JPG

sitting in the yard:
http://www.casdvm.com/photos/suzuki%20250/DSCN5176.JPG

strick

Re: Suzuki 250 4 stroke
 

Great pics! Those smiles can't be faked!

Re: Suzuki 250 4 stroke
 

That boat is looking great. The engine sounds like a great match. Navmanfuel flow systems have been next to impossible to get. I hope you are not waiting on the F2100. I had one on my boat last year and couldn't get rid of it fast enough. This year I went with a Lowrance LMF400 setup and could not be happier. If you want more info on this stuff let me know.

Re: Suzuki 250 4 stroke
 

I don't see Lowrance LMF400 on the website Jim.

Re: Suzuki 250 4 stroke
 

If you do a search for LMF it will pop right up. You can get lots of info on it at lowrance.com too.

Re: Suzuki 250 4 stroke
 

10-4 I put Lowrance LMF400 in the serch feature yesterday.

Re: Suzuki 250 4 stroke
 

It's the 3100. Been waiting close to 4 weeks. dealer says it should be in this week.... well see I guess :rolleyes: Thanks for the nice comments. I still have a bunch of little projects to do on the 23 but for now it's been serving it's time on the water.

strick

Re: Suzuki 250 4 stroke
 

Well it's been 6 months since I put this thing on the back of the boat and I finally have some numbers for you fellas. 23 SeaCraft with a 250 suzuki 4 stroke, 16x18.5 prop, hard top, bottom paint and a 29 inch bracket. Conditions were FAC 1/2 tank fuel and two guys on board. GPS was used to get the speed and Navman 3100 for the fuel burn.

4000rpm 24 knts 28.8mph 9.5 gph 3.03 mpg
4500rpm 28.5knts 34.2mph 11.0 gph 3.10 mpg
5000rpm 33 knts 39.6mph 16 gph 2.45 mpg
5500rpm 36 knts 43.2mph 19.5 gph 2.21 mpg
6000rpm 39 knts 46.8mph 22.5 gph 2.08 mpg

Thanks goes to Tim (Bigshrimpin) for going along with me and for figuring the numbers. One of these days I'll get you on some fish :(

strick

Re: Suzuki 250 4 stroke
 

That's an awsome set-up!!! I'm considering going from the Yam 250 2s to the Suzi 250 4s also. Did you have to change brackets to increase the flotation?? Are you running the alum. or glass bracket??

Re: Suzuki 250 4 stroke
 

My attention to detail calculating the MPG isn't exactly 100% rounding up to the nearest hundredth (in case anyone checks my math skills 3.03, 3.11, 2.48, 2.22, 2.08). Anyhoo . . . I am amazed by the fuel burn numbers with this combo.

Re: Suzuki 250 4 stroke
 

I'd be pretty dang pleased with those numbers Chuck.

I'm at 2.8mpg @ 4200 = 26mph right now.

I moved the motor's up 2 holes. It was 2.3mpg @ 4200 =25mph.

I'm moving them up to the bottom hole in the near future.
I believe I can go up on the pitch too. 18.5's now, going to 20's. I don't have the money for prop's right now.:(

http://img.photobucket.com/albums/v1...Mounted004.jpg

Re: Suzuki 250 4 stroke
 

This is the same bracket...it's fiberglass. If I remember right this motor weighs about 80 pounds more then my old Yamaha 250 2 stroke. I used to have a 15hp 4 stroke kicker mercury (125#s)plus the old Yamaha 250 on this bracket and together the weight was more then the 250 suzki.

strick

Re: Suzuki 250 4 stroke
 

3mpg is very impressive. I need to save my pennies and repower the old Mako.

Ed

Re: Suzuki 250 4 stroke
 

What is almost unbelieveable is that strick's boat hits 6K easy and will bump the rev limiter with 3 200lb guys and a full tank. I'd be interested to see how his boat would do with a 21pitch.

Re: Suzuki 250 4 stroke
 

Sound's like she has more room for tweaking. :)

Re: Suzuki 250 4 stroke
 

I'm no tweaker ;) so I wont be changing anything for a while. I'm really happy with the way it performs. It get's up and goes. It seems every bit as fast or faster then my Yam 250 2 stroke was. Trim tabs are a must because the extra weight/speed that I now have will make the boat porpoise slightly. Easy to adjust by tabbing down slightly.

strick

Re: Suzuki 250 4 stroke
 

With the motor hitting the Rev limiter there is room for some more pitch to be added.

It may slow the boat out of the hole by 1 or 2 secound's, but so what.

It should increase the top end speed and lower the cruising RPM to get even better fuel millage.

Re: Suzuki 250 4 stroke
 

Chuck - I'll keep my eyes peeled for a Rev4 19 or 21. You know you want to tweak that boat.

Re: Suzuki 250 4 stroke
 

Peer Pressure. :rolleyes:

strick

Re: Suzuki 250 4 stroke
 

HeHe Think $ in fuel savings. :D

Re: Suzuki 250 4 stroke
 

I don't know at what RPM you hit the limiter, but if you just barely hit it occasionally, then with the motors at a cruising RPM/speed, they won't be working as hard as if they were propped for a max of say 5K RPMs.(It's also nice to plane easily).

However, if your max RPM loaded is more than 200 RPM above the top of the recomended max RPM range, plan to change props. 1 inch pitch increase with the same style propos equals an aproximate 200 RPM drop in most cases.

I'm old school - I believe your max RPM at max weight should be the upper end of the max recommended RPM range. It's the old Mad Max theory. "Max at Max should be Max."

If you ever take on any water, and need to run to shore, or get up and drain your boat, having the available applied torque to plane with an extra ton of water in the boat is a VERY nice thing to have.

My previous Seafari was a '77 with a 225 Merc on the back. I once had had a fish snag a wire leader on my snap-in drain plug and thus remove it while 20 miles offshore which taught me about having extra power on tap. I couldn't find a spare plug in the boat when that happened, so all I could do when the water was above the cockpit sole was put it in gear and get going to drain it, and not stop until I ran it up onto the forks of the marine forklift back at the marina.

My advice? Keep it slightly underpropped.

Re: Suzuki 250 4 stroke
 

I agree with you 100% Fr. Frank. Having witnessed the power of that motor . . . I still believe there's some room for tweak'in, but it's one sweet ride.

Re: Suzuki 250 4 stroke
 

Well somehow I thought 1 knot = 1.2mph . . . I learned today that I was wrong and 1 knot =1.15mph . . . so here's the updated numbers

Sorry Chuck . . .

4000rpm 24 knts 27.60 mph 9.5 gph 2.91 mpg
4500rpm 28.5knts 32.78 mph 11.0 gph 2.98 mpg
5000rpm 33 knts 37.95 mph 16.0 gph 2.37 mpg
5500rpm 36 knts 41.40 mph 19.5 gph 2.12 mpg
6000rpm 39 knts 44.85 mph 22.5 gph 1.99 mpg

Re: Suzuki 250 4 stroke
 

well, 30mph at 6gph still comes out to 5 miles per gallon right? :D

Texaco hates me!