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Evinrude G2 NEW 1.9L inline 3 cyl 115H0, 140, 150hp series

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Evinrude G2 NEW 1.9L inline 3 cyl 115H0, 140, 150hp series

Old 06-15-2019, 02:58 PM
  #101  
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Originally Posted by Whaler27 View Post
The 1.9L uses the same bore size the 3.4L V6. The stroke is longer on the 1.9L. They aren't burning any more fuel in the 1.9L per cylinder @ WOT than they are in the 3.4L V6 @ WOT and probably less. The heat isn't a problem in the 3.4L so why would it be in the 1.9L?
I wonder how they can double the HP per cylinder using the same bore, (compared to the 150V6) and use less fuel? I was told they use the same pistons, true or not I have no idea, and I don't put much faith in people "in the know" saying such things, but it's all I can go on.
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Old 06-15-2019, 03:15 PM
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See many of these Etec's down under, according to Huey they are doing quite well down that way....cheers.

Originally Posted by noelm View Post

I wonder how they can double the HP per cylinder using the same bore, (compared to the 150V6) and use less fuel? I was told they use the same pistons, true or not I have no idea, and I don't put much faith in people "in the know" saying such things, but it's all I can go on.
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Old 06-15-2019, 03:21 PM
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I had an Evinrude dealer quite close to me, but recently they swapped brands, they are one of the biggest around and have a couple of shops, I don't see many Evinrudes at all local to me. Huey is well respected in the industry and his shop is about maybe 90mins drive from me, but, I am extremely lucky, I live a few minutes from the ramp, and have Honda, Suzuki, Mercury, Yamaha, Tohatsu and did have Evinrude within 15 min drive, so I have no need to go to Huey, but I have been there.
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Old 06-15-2019, 03:40 PM
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Originally Posted by noelm View Post

I wonder how they can double the HP per cylinder using the same bore, (compared to the 150V6) and use less fuel?
Visualize a half of a 300 HP V6 with a slightly longer stroke, improved technology and the RAVE valve system.
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Old 06-15-2019, 03:43 PM
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Originally Posted by seahorse View Post
Visualize a half of a 300 HP V6.
And that half-a-300 is making less HP per liter.
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Old 06-15-2019, 03:55 PM
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Originally Posted by seahorse View Post
Visualize a half of a 300 HP V6 with a slightly longer stroke, improved technology and the RAVE valve system.
I can visualise that, but it's double the HP per cylinder, of the V6 using less fuel! do you know if they do indeed use the same pistons (and injectors) or is it a complete "new" engine from scratch?
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Old 06-15-2019, 03:56 PM
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It's too new to have all the internal details but this is propshaft horsepower remember. The V6 300 has to develop much more than 300 hp to allow for gear and parasitic oil drag from the gearcase, overcoming the power needed to spin the engine near 6000 rpm and a percentage of power needed to generate 133 amps of current.

For the 3-banger, it perhaps has less drag on the gearcase, less internal friction, a percentage of its power (compared to the 300) is needed to generate its overall alternator amperage. I do not have the total output figures of the alternator, just the net charging output so far.

Those are just some examples of why the hp per liter are different yet the power output is 1/2 of the other.
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Old 06-15-2019, 04:31 PM
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I was just mulling this over, if it has a longer stroke, it must have a new crank and block, same bore means possibly lots of machining/tooling can be used, pistons the same? maybe, injectors the same? possibly, I think getting the HP is pretty easy, how to do it and retain longevity and improve fuel economy is a real "trick"
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Old 06-15-2019, 04:45 PM
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Originally Posted by noelm View Post
I was just mulling this over, if it has a longer stroke, it must have a new crank and block, same bore means possibly lots of machining/tooling can be used, pistons the same? maybe, injectors the same? possibly, I think getting the HP is pretty easy, how to do it and retain longevity and improve fuel economy is a real "trick"
You can increase the stroke without increasing deck height. You move the wrist pin up higher. At least in a 4 stroke that's what you could do.
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Old 06-15-2019, 05:04 PM
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Originally Posted by noelm View Post
I was just mulling this over, if it has a longer stroke, it must have a new crank and block, same bore means possibly lots of machining/tooling can be used, pistons the same? maybe, injectors the same? possibly, I think getting the HP is pretty easy, how to do it and retain longevity and improve fuel economy is a real "trick"
Put your modular thinking cap on and you'll see the light.
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Old 06-15-2019, 06:26 PM
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Don't remember seeing this posted.

https://www.boattest.com/engine-revi...0_e-tec-150-hp
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Old 06-15-2019, 11:18 PM
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Originally Posted by Elgreco809 View Post
You can increase the stroke without increasing deck height. You move the wrist pin up higher. At least in a 4 stroke that's what you could do.
doesn't that just push the piston into the head, or pull it down through the blind bottom bore?
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Old 06-16-2019, 06:36 AM
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Originally Posted by noelm View Post

doesn't that just push the piston into the head, or pull it down through the blind bottom bore?
If all you did was increase the stroke, the piston would pop out of the block. If you move the wrist pin higher on the piston, that doesn't happen. There's enough length in a cylinder that going to far down isn't an issue typically. My Shelby lancer has a 2.2 turbo. Chrysler made a 2.2 and 2.5l 4 cylinder. The block and rods were the same. Only the crank and pistons were different.
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Old 06-17-2019, 03:08 AM
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You can also use a shorter rod. Then it will be possible to restroke with the same piston. (then you have the rod angle +++).
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Old 06-17-2019, 04:37 AM
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Originally Posted by HighSpeedPursuit View Post
See many of these Etec's down under, according to Huey they are doing quite well down that way....cheers.
So you follow the Evinrude owners sight so much that you talk about a dealer halfway across the world like you know him? Evinrude Derangement Syndrome is real, and you may want to ask your mechanic what's the right treatment for you.
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Old 06-17-2019, 05:42 AM
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Originally Posted by A.M View Post
You can also use a shorter rod. Then it will be possible to restroke with the same piston. (then you have the rod angle +++).
Shorter rod means more side load and wear on the piston skirts and cylinder walls along with higher piston speeds.
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Old 06-18-2019, 02:31 AM
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Originally Posted by Elgreco809 View Post
Shorter rod means more side load and wear on the piston skirts and cylinder walls along with higher piston speeds.

Thereby the comment on rodangle +++
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Old 06-18-2019, 02:59 AM
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People getting very 'knowledgeable' about the internals of this engine and arguing the toss about the geometry when Evinrude haven't released any such details
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Old 06-18-2019, 04:38 AM
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So what is the 4-stroke manufacturers' counter response to a fuel efficient, emissions compliant 150 HP outboard that is under 400 lbs?
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Old 06-18-2019, 04:45 AM
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Originally Posted by Whaler27 View Post
So what is the 4-stroke manufacturers' counter response to a fuel efficient, emissions compliant 150 HP outboard that is under 400 lbs?
“Its a two stroke.”

As long as there’s people who care about that instead of actual performance and specifications, that’s all the other companies will need to say.
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