Classic AquaSport

Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: Asport-Rog on April 15, 2007, 09:01:46 AM

Title: 90hp E-Tec on a 170?
Post by: Asport-Rog on April 15, 2007, 09:01:46 AM: Hi,

I found this site after deciding to repower my 77' 170. My dad was the original owner our 170 and it was passed down to me in 94'. The boat had an 85hp Johnson on it that has been less than reliable the past few years.

I was wondering if anyone has the 90hp E-Tec on this hull? The old 85 would push it around 38-39 mph on gps. I would like to keep the same top-end but am concerned that the 3-cylinder won't have enough torque to get her on plane quickly with several passengers.

If I go to the 115hp V4 I am concerned about the weight.

Roger
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Post by: Mr. Osprey on April 20, 2007, 04:51:50 PM: Go for it, my 75ho merc was great on my osprey. If I still had it and was to repower, the 90 etec would be my first choice. Enough power to do all the watersports you want but light enough to not affect the transom.
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Post by: Asport-Rog on April 20, 2007, 05:03:20 PM: I pulled the trigger on the 90 E-Tec and I'm picking it up tomorrow. I'll post some before and after pictures of the install.
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Post by: Asport-Rog on April 29, 2007, 10:53:32 AM: I got to work on her this weekend!

http://i176.photobucket.com/albums/w173 ... railer.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/ontrailer.jpg)
http://i176.photobucket.com/albums/w173 ... /skid1.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/skid1.jpg)

I had the transom looked over by a local boat/fiberglass guy. He filled the numerous holes and such so I needed to re-drill. Here's a template I made to help mark the new holes.

http://i176.photobucket.com/albums/w173 ... mplate.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/transom-template.jpg)

I used a drill guide to get the holes drilled square.
http://i176.photobucket.com/albums/w173 ... /drill.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/drill.jpg)

I used a hoist suspended from the garage rafters.
http://i176.photobucket.com/albums/w173 ... ransom.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/ontransom.jpg)

Here she is bolted to the transom
http://i176.photobucket.com/albums/w173 ... ansom2.jpg (http://i176.photobucket.com/albums/w173/Asport-Rog/ontransom2.jpg)

Now to finish up the electrical, systems check tach, tilt gauge, etc... more pictures to come.
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Post by: slim on April 29, 2007, 11:27:21 AM: Job well done Asport-Rog I like every thing about thows new etecs except the price tag. they sure are proud of them.
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Post by: RickK on April 29, 2007, 08:21:11 PM: They're supposed to be nice motors though.
Nice progress :!: :!:

If you put each of those photobucket lines between this code: (http://...your%20photobucket%20path...), the pictures will appear in your posts.
Like this:
(http://i176.photobucket.com/albums/w173/Asport-Rog/ontrailer.jpg)
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Post by: Asport-Rog on May 16, 2007, 01:03:36 PM: Thanks RickK for the image tip.

I got her out this past weekend with the family. I'm really happy with the 90hp on this hull. It was very responsive and got on plane almost instantaneously.

We had 4 on board with a full tank of gas (27gal) and she topped out on the GPS at 36 mph. I’ll need to work on prop selection next. With a 17” aluminum prop, WOT rpm was 4500. It’s usually only me an my son for the most part so I want to see what WOT RPM is with just the 2 of us and play around with trim.
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Post by: gw204 on May 17, 2007, 10:00:33 PM: Damn...those E-TECs are vicious looking! I like it!!! Best of luck with her! :)
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Post by: RickK on May 18, 2007, 05:43:44 AM: That 90 really pushes her along. What is that black handle on the Port side for?
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Post by: JimCt on May 18, 2007, 07:52:45 AM: Nice job A-R!!! The dealer you got the engine from might loan you a couple of props to try.
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Post by: Asport-Rog on May 18, 2007, 01:49:20 PM: Rick- The handle is the hood latch, it wasn't closed in any of the pictures.

I have a 19" SST prop that I'll give it a shot when it's just me onboard but I have a feeling it will be overpropped. Good idea about asking the dealer, I'll do that Jim, Thanks!
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Post by: bamafaninfl on May 19, 2007, 07:50:37 AM: (http://www.thenailfamily.com/cpg132/albums/userpics/10002/normal_03122006%20001.jpg) I put a 90 Yamaha on my 77/170 could not be more happy with it. :D