Revisiting Tims thread re 2.1 L Merc 115

[Bigshrimpin]

The 115 "command thrust" model has the same larger gear case as the Merc 150 four stroke. It's comparable to any v6 gear case. Those Etecs are nice motors for sure. I'm no expert on this motor . . . I'm still running a 1980's 2.4L merc and I can't justify a new engine until I blow all 6 spare motors.

[Terry England]

[QUOTE=Bigshrimpin;234629]

Terry - It's funny (maybe not rational) . . . but I feel the same way about Yamaha and their use of gotcha metal parts i.e. "planned obsolescence". One rotten shift shaft ruined me on a 1989 motor. I'm sure folks with Yamaha 225/250 gut rot and speedy sleeve cranks or yamaha 350 Frisbee flywheels feel the same way. Do you have any pics of the wellcraft with twins?



Bigshrimpin - In the center, that is a picture of my V-17 Wellcraft Steplift (or maybe the V-20) Actually they were Alim hulls from Miami that WellCraft bought. The Step Lift 17 set the Miami to New York record that stood for many years. I had the exact same power with twin 50 HP Evinrudes. They were a C. Raymond Hunt design (Whaler, Bertram, Grady White) and would cut through the chop, but were wet. WellCraft used 1x12" pine stringers and wrapped the glass up 3 or may 4" on the sides. They put a 3/4" Plywood floor in it so you thought everything was solid when you stood in it. With the stringers broken loose the hull woild exhale and pop the inspection plates out of the floor! I opened a 3' long crack in mine when I was out of site of land. Slid it up on the boat ramp at Gulfport, Fla. Took everthing apart and put new fully enclapsulated stringers in it. The V-20's were better. Well-crack built the V-20 for 29 years before they ceased production on it. There are still a lot of them around here in Florida. Good ride but very wet with all that bow "flair".

You are right though, both Barry Sorento and I have had "troubled" childhoods. Of course the difference is I ain't in charge of much other than me and a few others. Black Logic - I can't follow it!

[Bigshrimpin]

Ha! I know the boat well. I started that v20 site in 2003 and passed the torch in 2007.

[Terry England]

Circling back on Gillie's original post "What about the new 4 storke 115 Merc's?"
I'm sure they are good engines, only time will tell if they are "great" engines like the 2.4 L chrome bore Black Max's or the 115 Tower of Powers.

I suppose there are only two "Tower of Powers" left in California -
Gillie's 115 "Tower of Power" and
Oakland Emilo Castillo's Tower of Power - "I still be digg'in on James Brown"

[JohnC]

I don't know if anyone has already posted this info but just in case. Here are the links to Scout performance bulletins for their 195SF.

https://www.mercurymarine.com/en/us/...units=imperial

RPM - MPH - GPH - MPG
1000 - 4.3 - 0.6 - 7.2
2000 - 7.3 - 1.5 - 4.9
3000 - 14.4 - 2.9 - 5.0
3500 - 21.2 - 3.3 - 6.4
4000 - 26.2 - 4.4 - 6.0
4500 - 31.1 - 5.7 - 5.5
5000 - 35.9 - 6.9 - 5.2
5500 - 41.2 - 8.4 - 4.9
6000 - 45.0 - 10.7 - 4.2

For comparison to a known motor:

http://www.scoutboats.com/wp-content...-195SF-115.pdf

RPM - MPH - GPH - MPG
1000 - 4.0 - 0.5 - 8.89
1500 - 5.6 - 0.8 - 7.00
2000 - 6.8 - 1.3 - 5.40
2500 - 7.8 - 2.1 - 3.69
3000 - 10.6 - 3.1 - 3.42
3500 - 20.2 - 3.5 - 5.77
4000 - 24.9 - 4.5 - 5.58
4500 - 29.3 - 5.9 - 5.01
5000 - 33.3 - 7.1 - 4.69
5500 - 37.1 - 8.7 - 4.29
6050 - 41.2 - 10.3 - 4.01

I would think you could expect similar results from the SeaCraft. The Scout 195 is a little larger and heavier but probably as close to the SeaCraft as you will find tested since most modern 19' fiberglass boats are powered with 150ish HP motors. Based on these bulletins the 2.1L Mercury is outperforming the Yamaha F115 in economy and speed. I'm not trying to bash Yamaha, I love mine. Just comparing something that is known to something that is unknown for reference. Different prop & setup are probably a factor in that but still impressive numbers for Mercury. I looked up two reviews with decibel levels and Mercury did well compared with Etec and Yamaha there too. I think the noise one is a little more subjective. Acoustics are complicated because they measure a spectrum of frequencies and some frequencies are more dominate to the human ear than others. A loud purr may beat a softer screech when it comes to the sound you hear in the cockpit at cruise speed.
All in all it looks like a nice offering from Mercury and they are usually a little less $$. I hope they hold up over time!

[72potter20]

Finally a good technical post on one of these motors. Thanks for that. the ink is dry for me, just need to decide on a prop.

[Normagain]

Originally Posted by JohnC

I don't know if anyone has already posted this info but just in case. Here are the links to Scout performance bulletins for their 195SF.

https://www.mercurymarine.com/en/us/...units=imperial

RPM - MPH - GPH - MPG
1000 - 4.3 - 0.6 - 7.2
2000 - 7.3 - 1.5 - 4.9
3000 - 14.4 - 2.9 - 5.0
3500 - 21.2 - 3.3 - 6.4
4000 - 26.2 - 4.4 - 6.0
4500 - 31.1 - 5.7 - 5.5
5000 - 35.9 - 6.9 - 5.2
5500 - 41.2 - 8.4 - 4.9
6000 - 45.0 - 10.7 - 4.2

For comparison to a known motor:

http://www.scoutboats.com/wp-content...-195SF-115.pdf

RPM - MPH - GPH - MPG
1000 - 4.0 - 0.5 - 8.89
1500 - 5.6 - 0.8 - 7.00
2000 - 6.8 - 1.3 - 5.40
2500 - 7.8 - 2.1 - 3.69
3000 - 10.6 - 3.1 - 3.42
3500 - 20.2 - 3.5 - 5.77
4000 - 24.9 - 4.5 - 5.58
4500 - 29.3 - 5.9 - 5.01
5000 - 33.3 - 7.1 - 4.69
5500 - 37.1 - 8.7 - 4.29
6050 - 41.2 - 10.3 - 4.01

I would think you could expect similar results from the SeaCraft. The Scout 195 is a little larger and heavier but probably as close to the SeaCraft as you will find tested since most modern 19' fiberglass boats are powered with 150ish HP motors. Based on these bulletins the 2.1L Mercury is outperforming the Yamaha F115 in economy and speed. I'm not trying to bash Yamaha, I love mine. Just comparing something that is known to something that is unknown for reference. Different prop & setup are probably a factor in that but still impressive numbers for Mercury. I looked up two reviews with decibel levels and Mercury did well compared with Etec and Yamaha there too. I think the noise one is a little more subjective. Acoustics are complicated because they measure a spectrum of frequencies and some frequencies are more dominate to the human ear than others. A loud purr may beat a softer screech when it comes to the sound you hear in the cockpit at cruise speed.
All in all it looks like a nice offering from Mercury and they are usually a little less $$. I hope they hold up over time!

This is with the old Yamaha 115 by the way since it is listed as 408lbs. The new Yamaha is close to the Merc in weight, not sure of displacement.

[McGillicuddy]

Originally Posted by 72potter20

Finally a good technical post on one of these motors. Thanks for that. the ink is dry for me, just need to decide on a prop.

Check out the Enertia from Merc. Seems Bigshrimpin got really strong numbers from an old 2-s 175 on his 23 using one. I think merc used one in that test with the the Scout

[gofastsandman]

Originally Posted by McGillicuddy

Check out the Enertia from Merc. Seems Bigshrimpin got really strong numbers from an old 2-s 175 on his 23 using one. I think merc used one in that test with the the Scout

The eco version has posted some better numbers than other props, but not eye opening.

[Bigshrimpin]

gfs - I run an older smaller diameter 17p enertia . . . The newer eco enertias are HUGE 16" diameter props meant for BIG hp motors.

This is a 17P enertia on my 23 into the wind, light chop, full fuel, slack tide. It's the fastest prop I've run so far.
https://www.youtube.com/watch?v=jg7cdv1w1vE