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Etec mounting height
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| arthureld |
Posted on 04/06/08 - 7:25 PM
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I have a 175 hp Etec on my 1984 Outrage20.
My motor is mounted at the highest position.
But when I'm going fast and I trim it up it seem like I have to go way up before I can hear it starting to slip.
I'm wondering if my engine should be mounted up higher. Has anyone found this to be the case with a Etec on a similar boat?
If I should raise it up, how can I do it since I'm at the highest position?
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| Joe Kriz |
Posted on 04/06/08 - 7:39 PM
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Roger,
There are a lot of variables....
1. Pay attention to your Tach....... The RPM's need to be in the range that the manufacturer specifies.
If you can't achieve the correct RPS's, then you would need to do one of two things.
Raise or lower the motor, or change props...
What are your RPM's at WOT?
We can start from there.
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| arthureld |
Posted on 04/07/08 - 3:31 AM
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Thanks Joe,
I haven't done a lot of testing, but so far I have been up to 45.5 mph at 5700 RPM.
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| scrimshaw |
Posted on 04/07/08 - 3:38 AM
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Roger,whats your thoughts on a Jackplate? You would have total control of engine height,find more top end speed and most likely better fuel economy!
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| arthureld |
Posted on 04/07/08 - 3:56 AM
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I don't know much about them Jim. Are you using one?
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| scrimshaw |
Posted on 04/07/08 - 6:23 AM
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Roger,I'll be running a 6 inch setback Rite-Hite plate this year.
scrimshaw attached the following image:
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| Derwd24 |
Posted on 04/07/08 - 7:12 AM
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How about some pic's so we can see where your cav plate is now in relation to the bottom of your boat?
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| Phil T |
Posted on 04/07/08 - 10:55 AM
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Let's hold off on discussing jack plates for a second and understand how the engine is mounted etc. Derwd is correct.
Let's get some information on how the engine is rigged.
1. What is the manfacturer's max RPM's for the engine?
2. Where is the top of the anti-cavitation plate in relation to the bottom of the hull? Above (by how much) at the same level or below (by how much)
3. What is the size and pitch of the prop?
Once we have this information, we can verify you are dialed in or how to change the setup.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| scrimshaw |
Posted on 04/07/08 - 12:18 PM
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As CBO and Joe mentioned numbers are helpful !I'm not saying you need one of these but I do sense you like I love our toys A quick search showed nothing but performance enhancements for a Boston Whaler V-20 with Jackplate.
scrimshaw attached the following image:
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Edited by scrimshaw on 04/07/08 - 1:10 PM |
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| arthureld |
Posted on 04/07/08 - 2:04 PM
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Thanks Jim, That motor is way higher than mine.
My prop is a Rebel 15.5 X 17.
arthureld attached the following image:
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| Phil T |
Posted on 04/07/08 - 4:16 PM
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Arthur:
When you say the engine is as high as it goes, how many holes are above the top set of bolts? Got a photo?
In looking at the Evinrude site, I see
WOT rpm for the engine is 5850
Gear ratio is 1:85
Maybe the prop guys can use this information.
Edited by Phil T on 04/07/08 - 4:17 PM
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| arthureld |
Posted on 04/07/08 - 4:28 PM
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Here's my bolts CBO
arthureld attached the following image:
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| Davidk |
Posted on 04/07/08 - 4:29 PM
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Is that a hole in the transom below the mount?
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| kamie |
Posted on 04/07/08 - 7:44 PM
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The 175 RPM range is 4850 to 5850. Not much higher you can go, unless you want to change props.
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| Phil T |
Posted on 04/07/08 - 7:47 PM
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Arthur -
The bolt positions are definitely not what I am used to seeing. I would guess they just reused the old holes and made it work as best as possible
I have attached a photo showing my engine (rigged in repowered by a dealer in 2003). I have room to go up in both the top set of holes and the bottom slot. See below.
While anti-cavitation plate on the engine appears to be a bit low, you are getting good speed and rpm's. You are only 150 rpm's short of max. If you raise the engine (jackplate or re-drill) you would over-rev unless you change props. Do you want/need more speed? Are you interested in going this way?
Phil T attached the following image:
[43.17Kb]
Edited by Phil T on 04/07/08 - 8:05 PM
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| arthureld |
Posted on 04/07/08 - 11:22 PM
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One of the biggest advantages I see in raising the prop is getting it off the bottom a few more inches. This area I live in has shallow spots all over the place. I constantly find myself in 18" or less of water and have to start feeling my way around. Good thing it's all sand around here.
From what I have read, the boat will get better gas mileage and run better if I set it up and back a little.
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| jeffs17newport |
Posted on 04/08/08 - 3:54 AM
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Please let the sunshine......... CBO
'Too cold to work on my boat so I am focusing on yours.'
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| arthureld |
Posted on 04/08/08 - 3:57 AM
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Davidk wrote:
Is that a hole in the transom below the mount?
lol, no that's bondo with a little primer on it. 
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| Phil T |
Posted on 04/08/08 - 8:56 AM
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Arthur -
Getting it higher for shallow water is a good idea.
I would suggest a jackplate just so you can raise the engine without having to re-drill holes. What many have done is use the existing holes in the transom and bolted the jackplate on. Once there, find the position on the plate for your engine where the anti-cavitation plate is 1 to 1 1/2 inches above the keel. You many need to do some measuring to ensure the jackplate is the right size (vertically)
I have heard Bob's is a good brand for this application and not as expensive as CMC and others.
You may find that the bolts in the transom don't line up will with the jack plate. In this case you can drill new holes in the plate.
A second option is a setback bracket. The farther back you go, the more the engine will need to be raised.
I think that, regardless of which option you pick, you may need to change propellers.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| kamie |
Posted on 04/08/08 - 2:36 PM
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arthureld wrote:
I have a 175 hp Etec on my 1984 Outrage20.
My motor is mounted at the highest position.
But when I'm going fast and I trim it up it seem like I have to go way up before I can hear it starting to slip.
I'm wondering if my engine should be mounted up higher. Has anyone found this to be the case with a Etec on a similar boat?
If I should raise it up, how can I do it since I'm at the highest position?
arthureld wrote:
Thanks Joe,
I haven't done a lot of testing, but so far I have been up to 45.5 mph at 5700 RPM.
Trimming the engine out until the prop gives is not the right way to test props. What prop is on the boat now? I assume the 45.5 and 5700 was at WOT, pushed to the wall with how many people on the boat? Just you or you and a full tank of gas and several of your best buddies? What do you think your missing with 45.5? Do you want more speed, faster hole shot or better cruising or better fuel economy?
You can't raise the engine, but you can swap the prop, depending on what you want that may be all you need.
If you go with a jackplate or bracket, be aware that it changes the trim of your boat, yes you can possibly run in "skinner" water, but the stern sits lower, the drains that were not under water a rest may be now and you may not get what you want from a performance and speed perspective.
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