FOUR STROKE 150 HP DATA - Page 2

#11 06-23-2004, 07:05 PM

REELAPEELIN You might want to check the weight of that Honda 150,I went for the Suzuki 140 it was 105 lbs lighter than the Honda 115 and had a 6 year warranty
Capt K

sailboat · #12 06-23-2004, 07:22 PM

The data I put up was in haste and WRONG!!!\
4000 RPM 30 MPH
4600 RPM 36 MPH
5600 RPM 45 MPH

Tommorrow I'll change props and get back to you. Possibly I'll even qet the data correct on first enty.

The grey hair seems to be growing into the brain.

bigshrimpin · #13 06-23-2004, 10:52 PM

Sailboat - Thanks posting the information on the new 4 stroke 150 (yamaha). I have heard many good reports on that engine.

Capt. K - can you post some performance number with your suzuki 140? I am curious.

#14 06-23-2004, 11:55 PM

I dont have exact numbers. I normaly run at 4200rpms and that give me a speed of 28mph. (gps) I dont run much higer than that and I figure I am between 4and 5 gals per hour. I redline at 5600rpms. Capt K

reelapeelin · #15 06-24-2004, 08:54 AM

sailboat's revised numbers look great(can't get by with messin' up on this board!)
capt k... Honda looks to be 12lbs more than yammy sailboat's talkin about...my old rude is 392...yam is 466...honda is 478, so i'm addin' 86lbs(gawd, i hope my math is right)...

#16 06-24-2004, 03:27 PM

Sail, thanks for the revision ... that is what I thought it was gonna be. My numbers are about the same for 4000 rpm and 4600 rpm but I topped out at 40 mph at 5000 rpm.

It is interesting that you go to 5600 rpm or even to 6000rpm.

But what impresses me most is the fuel economy that you are going to see. I only hope you get to put in enough hours of enjoyment to fully realize this advantage.

I recommend you get a navman fuel flow meter. It will help you monitor your engine's operation for any unwanted changes, find the most economical trim, tilt and rpm settings, and constantly remind you of how smart you were to buy your 4-stroke. 8)

Keep us posted.

#17 06-24-2004, 03:32 PM

heh - heh RAP ... not on my watch ::)

sailboat · #18 06-24-2004, 08:12 PM

-Changed props (to a 14 1/4 X 15) today on the 150 Four Stroke Yamaha and it got me to 6000 RPMs, but reduced speed 2.5 MPH across the board. So back to the 14 1/4 Diameter by 17 Pitch. (previously reported by me as a 14 1/2).

-Couldn't wait for the final break in numbers so asked the guys to hook up today and give me the numbers.

- Final results are as follows:
4000 RPM 30 MPH 6.8 Gallons per Hour (GPH)
4500 RPM 35 MPH 8.4 GPH
5600 RPM 45 MPH 15.1 GPH

-Only 3+ hours on engine now. My experience tells me she will loosen up a bit by 100 hrs and gain a little.

-I do not believe that it matters what engine you really get in the four stroke arena. All are great and quiet! No more ear plugs during the commute to work.

-Certainly appreciate all your comments and forgiveness for errors.

#19 06-25-2004, 12:13 AM

The only time I notice the extra weight is when I am drifting and I have one or two people in the cockpit.The scuppers are below the waterline,and it gets a little damp underfoot. It was suggested that I move my batteries foward but I dont want to get into that.
Capt K

Airslot · #20 06-28-2004, 05:06 PM

As to the scuppers, I have plugs on board for such a situation. Easy to yank if ever needed. As for those fuel burn numbers...I don't know. If got the Navman fuel kit with my chartplotter. Those numbers you just posted are about identical to what I run on my 1988 carbed 150 merc. Especially the 3900-40o0-rpm#. I know that depending on load I burn 6.7 to 7.1 gph at 25.5 - 26.5 kts, right about 30 mph. I hope to repower in a year or so and will be looking to get more range out of my 60 gallons of fuel.

Airslot