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Supersport 15, F70 Install - work in progress
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| tedious |
Posted on 08/28/10 - 2:47 PM
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Still plenty left to do, but haven't broken anything so far!
http://s943.photobucket.com/albums/ad...5c583e.pbw
Tim
Edited by tedious on 08/28/10 - 6:02 PM |
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| Derwd24 |
Posted on 08/28/10 - 11:47 PM
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Very nice Tim, nothing like rigging up a new engine! Looking forward to hearing how it performs.
Custom stainless transom plates look slick. How did you shape the lower ones to the radius without getting ding marks from the hammer? And what did you use to polish them up?
Dave - 1983 Outrage 22 |
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| John Fyke |
Posted on 08/29/10 - 12:54 AM
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Very nice job.
John Fyke
Re-Fit or Reef It
1979 15' Sport with Super Sport conversion and 70hp mercury. |
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| tedious |
Posted on 08/29/10 - 2:43 AM
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Thanks. The lower transom plates started life as 3" tubing, then cut and straightened - it was reasonably polished from the start. Despite my best efforts, there are hammer dings, they just don't come across in the photos.
The upper plate was easier, just a simple chunk of 2" x 5/32" 316. In retrospect, I wish I'd gone a whisker thicker, but it will be OK. It was rough from the mill, polished with a random orbit sander from 80 to 400 grit, then a run across a buffing wheel.
Tim
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| John Fyke |
Posted on 08/29/10 - 3:07 AM
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Tim. it still looks great. Not all of us are professionals. We just love our Whalers. Looks good.
John Fyke
Re-Fit or Reef It
1979 15' Sport with Super Sport conversion and 70hp mercury. |
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| tedious |
Posted on 09/05/10 - 6:29 PM
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Updated original slideshow with new photos: http://s943.photobucket.com/albums/ad...5c583e.pbw
and added a new slideshow showing the start of the electrical installation: http://s943.photobucket.com/albums/ad...b8dbf9.pbw
Hopefully some will find this interesting and / or helpful - more to come!
Tim
Edited by tedious on 09/06/10 - 5:20 PM |
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| TechTeach |
Posted on 09/06/10 - 4:59 AM
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Did the holes match up from the old 70?
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| MW |
Posted on 09/06/10 - 9:15 AM
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Nice "Fabrication" work !
Matt |
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| tedious |
Posted on 09/06/10 - 5:22 PM
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TechTeach wrote:
Did the holes match up from the old 70?
Yes - lined up just fine. Bolt pattern is the same as my old 1989 Johnson - luckily, original owner did not use the blind holes, although the motor was all the way down.
Tim
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| CES |
Posted on 09/06/10 - 5:24 PM
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Wow!!
Cliff
1966 13' Sport with a 1993 40hp Yamaha 2 Smoker |
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| tedious |
Posted on 09/18/10 - 3:29 PM
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Install and test run (on muffs) is complete - for now; I'll probably do some work on the cable routing over the winter, but right now I need to get on the water before the season closes down. The install slideshow is updated:
http://s943.photobucket.com/albums/ad...5c583e.pbw
First time on the water tomorrow, if the weather cooperates!
Tim
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| Phil T |
Posted on 09/18/10 - 4:01 PM
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I would ask Santa for some rigging hose and grommet. See my personal page for the results of my install.
Nice work.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| ErichBW |
Posted on 09/18/10 - 9:51 PM
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Nice job on the mounting plates, they look stout! I am interested to hear how that engine performs on your boat.
Erich Saiter |
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| tedious |
Posted on 09/19/10 - 11:43 AM
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Phil T wrote:
I would ask Santa for some rigging hose and grommet. See my personal page for the results of my install.
Nice work.
Unfortunately, Yamaha has chosen not to set the F70 up so the rigging hose can run right to the cowling, as it does on larger motors. I did get some of the Yamaha rigging hose, and it was way too big - visually ridiculous on the 15. I then tried some other rigging hose (supposedly smaller diameter) and it was too big as well. Now I have found some smaller hose intended for outdoor spas, and some PVC connectors, but it's going to take some work, so it's waiting for winter.
Anyone want to buy some rigging hose?
Tim
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| Derwd24 |
Posted on 09/19/10 - 1:47 PM
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Tim, Did you make it out today to water test? Weather was fantastic.
Dave - 1983 Outrage 22 |
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| Phil T |
Posted on 09/19/10 - 2:25 PM
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Tim -
I am going to check with my local Whaler/Yamaha master dealer's parts manager. He may be able to identify an adapter and/or the appropriate rigging.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| Phil T |
Posted on 09/21/10 - 1:22 PM
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Well, I was totally wrong and the rigging information you received is correct. Only the higher horsepower engines have the grommet and hose system I have.
Port Harbor Marine, the master dealer I spoke to uses the black mesh and zip ties for covering the cables. To install you would need to derig the motor.
Sorry to sidetrack the thread.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| tedious |
Posted on 09/21/10 - 6:24 PM
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Thanks for trying Phil - I appreciate the effort. I think I can do a good job with a custom setup, but it will take a little time so I think it can wait until the boat gets put up for the winter.
Tim
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| tedious |
Posted on 08/08/12 - 12:37 PM
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Well, nearly two years later, some more things to report:
1) I really like the F70 - quiet, reliable, and very good mileage - between 9 and 10 mpg anywhere between 3000 and 4000 RPM. Best cruise mileage is in there somewhere.
2) I added a 5" setback jack plate and am now running with the AV plate 3.75" above the keel line. I like the performance - seems to have cut down on the bounciness, and the trim control has more effect. Best of all, it seems to hold a plane down to a lower speed than before - most of my boating is in the ocean and it's often necessary to keep speed down to keep the boat on the water. The other nice thing is that with the motor tilted up, it's now completely out of the water - without the jack plate, the nose of the gearcase dipped in. The downside to the jack plate is that I hear more motor noise, but not a great deal more, especially at low speeds where it matters.
3) I'm still playing with finding top speed - it's rarely calm enough. One recent run got me to 5900 RPM / 41.6 MPH, with full gear, 235-pound me, and about 9 gallons of gas. I basically trimmed up until I got chicken - there was clearly more speed to be had with more trim, but things were getting squirrely and I backed off. With my prop (Stiletto Advantage 13.25 x 15) those speed numbers make no sense, as the prop calculator shows negative slip even if I bump the pitch to 17 to take account of the fairly aggressive cup of the Stiletto. But the data is from the GPS networked to the motor, so should be quite accurate. I don't know what to make of that - will have to experiment more, including making note of the trim angle.
Tim
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| tedious |
Posted on 10/01/14 - 4:55 AM
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Well, another 2 years on, and I still like the F70. I've removed the jackplate for now - didn't seem to do all that much for me, and made storage tough and increased the noise level when running slowly along.
I tried a prop with more stern lift (Stiletto Star) and in some ways I liked the performance - you could really feel increased grip on the water over the Advantage. But it didn't help with the porpoising much, if at all, and it had so much bite in reverse that it would stall the motor when using it to brake while docking. So I'm back to the Advantage, which is a good fit.
Mileage continues to be great - with just me on board and running at 3500 RPM, I get just over 10 mpg. Even more impressive, I had 4 fairly large people on board the other day, probably over 800 pounds of bodies; I had to bump the RPM up to around 3800 to reliably hold plane, but mileage was still in the mid-8s.
My wife loves the F70 too - it's completely odor-free, and just so quiet and smooth. We like to poke our noses into various tight spots in and around Boothbay Harbor on the Maine coast, meaning extended running at idle and a bit above it - the motor just purrs.
Tim
Edited by tedious on 10/01/14 - 5:46 AM |
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