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1978 Montauk Repower
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| Hampton Hager |
Posted on 02/22/18 - 2:15 PM
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I have a 1978 Montauk. My Dad purchased it new. Boat has been stored inside all its life. Lightly used. Its in really good shape. It has a 85 Johnson Seahorse. I purchased a new trailer for it (Original one was beyond repair). Now I'm ready to repower it. Im leaning toward a 90 HP engine. Weight between 70 hp and 90 hp is pretty close. Can anyone convince me why I shouldnt go with the 90 hp? And I'm leaning toward Suzuki. If anyone has experience with newer model Suzuki's, I would like to hear your experiences with them. Thanks!
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| Joe Kriz |
Posted on 02/22/18 - 3:15 PM
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Hard to beat the weight of the Yamaha F70 at 253 pounds.
http://www.whalercentral.com/articles...ticle_id=5
90hp motors weigh considerably more and are more expensive.
Does anyone really use the full potential of a 90hp on a Montauk?
Not very many days that you can really open up a 90hp on a Montauk or a 70hp for that matter.
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| JRP |
Posted on 02/23/18 - 3:46 AM
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Joe gives good advice above.
When you say "weight between 70 hp and 90 hp is pretty close", that may be true of certain makes, such as Suzuki who bases both those engines off the same 1.5L block. Merc is sthe same, as their 75-90-115 hp engines share a common 2.1L platform and are all the same weight.
To see some weight savings, your search should include 70 HP engines that are not from the same platform as their 90 hp stable mates. The Yamaha 70 that Joe mentioned is a perfect example of this. It's still 4-cylinders, but it only displaces roughly 1.0L so it is much lighter.
It might be worth your time to read several relatively recent threads discussing re-power options for the classic Montauk 17:
http://www.whalercentral.com/forum/vi...d_id=24036
http://www.whalercentral.com/forum/vi...pid=152624
19 Outrage II (1992) |
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| Hampton Hager |
Posted on 02/23/18 - 6:32 AM
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All the 90 hp motors weigh about the same. Going to a 70 will reduce the weight by about 100 pounds. I like the Yamahas. I've owned a 30 tiller 2 stroke and a 150 2 stroke. Both good motors. The issue I have with the Yamaha is the pricing. It it worth the $2k extra over the Suzuki. I'm thinking about relocating the battery to under the console to shift that weight off the back end.
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| JRP |
Posted on 02/23/18 - 10:03 AM
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Hampton Hager wrote:
All the 90 hp motors weigh about the same. Going to a 70 will reduce the weight by about 100 pounds. I like the Yamahas. I've owned a 30 tiller 2 stroke and a 150 2 stroke. Both good motors. The issue I have with the Yamaha is the pricing. It it worth the $2k extra over the Suzuki. I'm thinking about relocating the battery to under the console to shift that weight off the back end.
Going to a Yamaha 70 will reduce the weight by about 100 lbs. The Suzuki 70 won't save you any weight over the 90. If you're dead set on Suzuki, you might as well get the 90 since it's the same weight as their 70.
That said, if I was going to hang that much weight on the transom of a Montauk 17, I'd opt for the 2.1L Merc 90 HP Fourstroke. You get 40% more displacement, a maintenance free valve-train, and user-friendly maintenance features.
Then again, maybe Suzuki is just offering a better deal? Here are Jaco's prices for the Mercs:
Merc 75 ELPT 4S -- $7,120
Merc 90 ELPT 4S -- $7,430
http://jacosmarine.com/mercury-engine...e-pricing/
19 Outrage II (1992) |
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| Hampton Hager |
Posted on 02/23/18 - 1:18 PM
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I saw the Jacos link on another post and checked them out. Good pricing, but not sure what all it includes. Plus is at least an 8 hour drive from me.
The Suzuki includes complete rigging, installation, and taxes for $1800 more than the Jacos price. And its just 45 minutes from my home.
I priced out 90, 80, 75, and 70 hp from 7 different dealers. Suzuki was definitely the most competitive. Yamaha and Mercury were at the top cost wise, with Tohatsu in the middle.
I do like the Yamaha. They definitely are good motors.
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| Phil T |
Posted on 02/23/18 - 2:33 PM
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In addition to price and weight, the one significant difference is performance.
A Montauk/16'7 hull running a properly rigged 90 hp with a stainless steel prop with light load and sole occupant will reach 42-46 mph at wide-open-throttle (WOT)
A 70hp motor will reach 37-41 mph.
If you run 75% of the time with 2+ passengers, gear and cover significant distances on the ocean, go with a 90hp. If on lakes/rivers, a 70hp will be fine.
Jacos prices are for new engines in a crate. Rigging is separate. Installation is available. Prices do not include current factory rebates.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| JRP |
Posted on 02/23/18 - 2:54 PM
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Since you seem to be leaning toward the engines at the heavier end of the spectrum, one more to consider is the Honda 100. It weighs right in the same range as most of the 90 HP engines, but you get that extra HP bump. And I believe it is still within the HP-rating of the Montauk hull. Might be worth getting a quote?
[Honda is running a good rebate right now. And there is some kind of deal where the rebate gets doubled if the engine is ordered at a boat show: http://marine.honda.com/promotions/po...elebration]
Me, I'd want the 40% extra displacement of the Merc 90 if I was going with the engines in the +/-350lbs range..
19 Outrage II (1992) |
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| RobertJ |
Posted on 02/23/18 - 5:46 PM
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Of course if one was not dead set on a four stroke, there's the Evinrude ETEC 90 that weighs in at 320 lbs. Decisions ....decisions..
Edited by RobertJ on 02/23/18 - 5:48 PM
1995 Dauntless 15 - 1995 Evinrude 70 |
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| action |
Posted on 02/24/18 - 7:10 AM
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I'm sure all options have their benefits. I have the ETEC 90 on my 1988 Montauk and love it.
My brother has a Yamaha 70 on his and also likes it.
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| Openwater650 |
Posted on 02/24/18 - 11:33 AM
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I repower my 1979 montauk with F70 3 years ago and love it. I choose the F70 because I also run a kicker motor trolling for salmon and did not want the extra weight of a 90hp. My boat does around 35mph though hardly able to that fast in the ocean due to conditions off coast of San Francisco.
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| 12fish74 |
Posted on 02/24/18 - 3:29 PM
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I went with a 90 Merc 2.1 L, with almost 300 hrs on it now not 1 single issue. Just change oil once a season & lower unit oil. Its almost maintence free.
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| Hampton Hager |
Posted on 06/21/18 - 7:36 PM
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Check out the pictures on my personal page.
Just got my 1978 Montauk 17 back from her re-power. That white Suzuki looks good on the back! Plan on taking out this Saturday for the break in. I'll post results after the excursion.
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| tedious |
Posted on 06/22/18 - 2:21 AM
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Very nice! I like the white and the motor is not visually large like some of them are.
It looks like you have an aluminum prop on there - hope that's just for trial purposes, as your nice, new motor deserves a quality stainless prop.
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| hungerwater |
Posted on 06/22/18 - 5:01 AM
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I bought a 1977 sport (17 foot) last year with a Yamaha 100hp motor. It is a great set up but a lot of motor weight. When I repower I am probably going to drop down to 90 or even 70 hp. It sure is a lot of fun cruising at full speed in the boat, but most of the time with boat traffic on the intercoastals I don’t need or want the higher speeds. In addition my teens are starting to use the boat and they certainly don’t need to go that fast. Hopefully the motor will last a lot longer though.
Some days when I’m the only boat out on flat water it sure is fun though.
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| Hampton Hager |
Posted on 06/22/18 - 11:41 AM
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Hungerwater - Where are you from in SC? My wife and I are going to run the intracoastal from Georgetown to Southport in a few weeks. I've done it before. Its a fun little trip.
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| hungerwater |
Posted on 06/23/18 - 5:26 AM
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Hampton Hager - I live in Greenville, SC. Most of my boating time is on the intercoastal around Sunset Beach, NC. Very familiar with the trip from Sunset to Southport. I haven’t headed towards Georgetown yet but that is on my list. My boat is in the garage now about 2/3 of the way through a re-do and custom update. HOpefully I’ll be back on the water by mid July. Have a great trip. Hit Provision Company in Holden on your trip. Maybe some day my boat will be done and I can meet you out on the water.
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| Weatherly |
Posted on 06/23/18 - 6:23 AM
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Hampton Hager: The photographs you posted of your new outboard show bolts securing the engine to the transom using only the upper bolt holes in the engine bracket. Your outboard was not installed properly. Check out the various articles on the website to learn more about proper outboard installation, e.g., Standard Engine Bolt Pattern vs. Blind Holes. http://www.whalercentral.com/articles...icle_id=82
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| tedious |
Posted on 06/23/18 - 7:00 AM
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Good eye there - that is an UNSAFE installation and the boat should not be operated until that is corrected.
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| Phil T |
Posted on 06/23/18 - 7:31 AM
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Hampton -
You have a great boat. A few suggestions:
The mounting position is very conservative. Since you need to address the mounting, I strongly urge you to raise the motor at least 2 holes. See http://www.whalercentral.com/articles...cle_id=106
Bilge hose routing - I see the hose is routed through a hole made in the splashwell back wall. If there is any foam/wood exposed, that is ill advised and should be sealed up. Many members route the hose either up and over the splashwell wall or route the bilge hose with the steering cable
In doing a search of the archives, I found a decent thread between a member with a classic Montauk 17 and a DF90. The recomended prop is the Suzuki 14x18. Note the prop rattle is solved with a different hub insert. http://www.whalercentral.com/forum/vi...ost_110090
Once you have resolved the mounting issues, please provide some performance numbers (in a new thread). Members will want to know for future reference when considering repowering.
Edited by Phil T on 06/23/18 - 7:48 AM
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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