Classic AquaSport
Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: aquaterra on July 25, 2010, 08:05:08 AM
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hey everyone im looking for some input, i just picked up an old 19.6 aquasport and i am currently rebuilding the stringers and deck and id like info on the motor size i should go with. im debating between the yamaha 115 2stroke or a 150 2 stroke. im planning on raising the deck 2 inches or so for overall dryness of boat and ive lightened the hull extensively. on one hand the 115 will get me better gas mileage but i was curious on the 150 ive only ever had the yamy 90 so both are a step up. the stringers and deck will be foam for lightness and im trying to maintain my shallow draft cus i play inshore and on the reef mainly not running offshore. i need opinions about everything speed gas mileage, weight, handling whatever bring it on.. thanks alot.
o ps. jack plate or not?
will get pics as soon as i get them from my freinds camera
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115 on that hull be a slug. I have a 94 200osprey which is the same hull and i had it rigged from the factory with a 150 yammi. hits almost 50 with a good tailwind and the t-top. I never checked the fuel consumption but I know I can do 3 days fishing in flamingo on 56 gal.
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What bumpster said.
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Based upon what the guys said on the other blog, for performance and reliability, here's a thought:
http://www.mercurymarine.com/engines/ou ... L/?model=0 (http://www.mercurymarine.com/engines/outboards/optimax/2.5L/?model=0)
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I don't think a 115 would be excrutiating. I used to run a 90 on mine and probably still would if it didn't blow up. You could expect high 30's WOT and low 30's cruising. If I had to choose between the two, the 115 would be my choice. I like having gas in my tank :)
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My 150 2 stroke would run for days down in Flamingo on a single tank. Nice thing is that the boat scoots at a little over half throttle but if you need to be someplace in a hurry You can trim the motor all the way up till it starts to porpoise and then put the tabs down till it stops. Only the back 3 ft of boat is touching water. Great for outrunning the summer storms in the bay and backcountry. Always a fan of running the most power you can afford. You dont have to use it but it's nice to know it's there
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There is a lot to be said about outrunning storms in the summertime. You should really ask yourself what's more important to you: Speed or draft?
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hey thanks for the input so far. well im really looking for draft but if im only gonna give up an inch or so for speed thats not to bad of a sacrifice. i lightened up the boat significantly and wouldnt mind kepin it real shallow. how much would i be strugglin with the 115 if the boat is light. i mean i ripped out all the old wet foam in the stringers and under deck and all the plywood from the deck and im replacing all them 4lb stringers foam and glass and redoing the deck in foam instead of plywood. more opinions please... o ps. i have a 26 gallon fuel tank.
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hey thanks for the input so far. well im really looking for draft but if im only gonna give up an inch or so for speed thats not to bad of a sacrifice. i lightened up the boat significantly and wouldnt mind kepin it real shallow. how much would i be strugglin with the 115 if the boat is light. i mean i ripped out all the old wet foam in the stringers and under deck and all the plywood from the deck and im replacing all them 4lb stringers foam and glass and redoing the deck in foam instead of plywood. more opinions please... o ps. i have a 26 gallon fuel tank.
The differnece in wieght between a 150 v6 and a 115 v4 is about 60lbs maybe. thats the weight of a 9-10 yr old kid.
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hey thanks for the input so far. well im really looking for draft but if im only gonna give up an inch or so for speed thats not to bad of a sacrifice. i lightened up the boat significantly and wouldnt mind kepin it real shallow. how much would i be strugglin with the 115 if the boat is light. i mean i ripped out all the old wet foam in the stringers and under deck and all the plywood from the deck and im replacing all them 4lb stringers foam and glass and redoing the deck in foam instead of plywood. more opinions please... o ps. i have a 26 gallon fuel tank.
The differnece in wieght between a 150 v6 and a 115 v4 is about 60lbs maybe. thats the weight of a 9-10 yr old kid.
That's true of the newer 2 stroke yamaha's (if you're not going with HPDI or VMAX), but the older ox blocks was about 100lbs
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how much would i be strugglin with the 115 if the boat is light.
:D Ha! :lol:
Im currently running a 90hp Tohatsu on my 19-6 and a 45 gal tank. With full fuel and 4 adults I can run 32mph @ WOT, Add 2 kids and im still at the same speed. These boats have very little bow lift in the hole shot, they're practically on plane through the entire throttle range. With the 90hp I notice the waterline is just below the scuppers.
I think a 115 or ideally a 130 Etec would be perfect for the 19-6.
Heres and interesting read about HP from back in the day. http://www.classicaquasport.com/gallery ... 542/page/1 (http://www.classicaquasport.com/gallery/showphoto.php/photo/2730/sort/1/cat/542/page/1)
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how much would i be strugglin with the 115 if the boat is light.
:D Ha! :lol:
Im currently running a 90hp Tohatsu on my 19-6 and a 45 gal tank. With full fuel and 4 adults I can run 32mph @ WOT, Add 2 kids and im still at the same speed. These boats have very little bow lift in the hole shot, they're practically on plane through the entire throttle range. With the 90hp I notice the waterline is just below the scuppers.
I think a 115 or ideally a 130 Etec would be perfect for the 19-6.
Heres and interesting read about HP from back in the day. http://www.classicaquasport.com/gallery ... 542/page/1 (http://www.classicaquasport.com/gallery/showphoto.php/photo/2730/sort/1/cat/542/page/1)
I have 200 which I believe is the same hull. With the 150 it sounds like our scuppers are at the same place in relation to the water. Not trying to knock anyones rig I just dont see the point of underpowering a boat. If money is not the deciding factor bigger is better and faster. just my .02
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With a 26 gallon tank I'd personally lean toward a smaller motor. 32 mph is not underpowered in my book.
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Aquaterra,
Thanks for a thought-provoking post. And frankly, a bread n' butter post. Relevant ten years ago, and at present....and ten years from now.
You want speed? You want power?..... add weight.
You want low draft? You want economy?.... subtract weight.
Your choice is.....how is she used? The members have made great recommendations, based upon their own experiences/beliefs/uses....your local needs will choose what's best for you.
My personal input is that a high output 3 cyl., or light four cylinder two stroke would be the one for your 19-6....Smokin' hole shot, great mileage, great reliability....fast still, economical, light weight....from what the boys have said.... it may be a Merc...... Look for something under 400 lbs....385 to me would be ideal.
So, the issue....115 or 150.....choose the high range.....a 130.
A 115 Yammie V-4 is no slouch....lotta torque...especially since you're removing 400 lbs. of dead weight on the rebuild. If that Yammie 115 is on her, I'd run it.
And Skoot's big 3 cylinder Tohatsu does an awesome job....at fifteen gallons, full day.
Choices, choices.... :lol:
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lovin the inpute
i plan on using it to play in the bay, some mild back-country and oceansidee trips to the reef. i am really leaning towards the 115 yamaha and i heard the only difference between the 130s and the 115's are the carbs. does anyone know the weight of the yamahas im talking about?
and if i put a half-tower onthe boat would the wind drag effect my equation.
if i put on the bigger carbs would i be burnin roughly similar to the 150 but have less power at the same consumption?
more .02 cents please
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lovin the inpute
i plan on using it to play in the bay, some mild back-country and oceansidee trips to the reef. i am really leaning towards the 115 yamaha and i heard the only difference between the 130s and the 115's are the carbs. does anyone know the weight of the yamahas im talking about?
and if i put a half-tower onthe boat would the wind drag effect my equation.
if i put on the bigger carbs would i be burnin roughly similar to the 150 but have less power at the same consumption?
more .02 cents please
The tower will cause drag and slow you down some.
you wont carb a 115 or a 130 up to a 150 simply because you are going from 4 cyl to 6. Not sure what the burn rate is for a 4 cyl.
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Love to see the outboard debate. Everyone has there preferences but let me throw in my 2 cents
I work as a full time fishing guide spending 250 plus days a year on the water putting 700hrs a year or more on my outboard. I run a 150 opti max and the fuel consumption and reliability are incredible. Its the 4th one I have owned as I'm on there guide program and run them for 3 years before trading them in. I have ran many other types of motors on both clients or other guides boats and am yet to find one to compare. My boat with a 150 and a 21 pitch prop runs at 3000rpm burning 4.5 gph at 30mph cruise thats about 6 mpg. No four stroke gets better fuel economy than that. I have buddies that run the same rigs one with a 150F4 and one with a 115F4. The fuel economy of the 115 is about the same as my opti but you have to run about 4000 rpm's to cruise. The 150F4 burns more fuel and does not come close to the performance of my opti. The smartcraft gauges that are available really let you dial in your fuel economy.
The Yamaha four strokes are very reliable and quiet but as far as performance are just not comparable to a 2 stroke. If your looking for economy, reliability and out and out torque get a merc opti.
Capt Matt
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Capt. Matt,
Read your commentary with interest a week or so back. Appreciate your honesty, no reason for you to pump one brand vs. the other, except per experience. NO ONE here runs an outboard every day. So thanks!
Have been doing quite a bit of research on the Mercs.....pretty darn impressive.
Please post your guide link in the classifieds...or PM....may decide to head your way.
Thank you,
Scott
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www.captmattmitchell.com (http://www.captmattmitchell.com)
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Ok then..
how much fuel is to much fuel to carry with a 115. 40-50 gallons?
its on a 19.6
coool
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My tank is approx 25 gallons in the 170 and at 6gal/hr at cruise, gives me a good range.
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Thanks for the input Capt Matt! :salut: The guides and pro fishermen I know that run Optis have the same opinion - they love 'em! There were a few hiccups with the first Optis back around 1999-2000, but those issues were worked out and it seems the current Optis are very reliable and fuel efficient.
It's always good to hear the opinion from someone who's out there daily - few of us put over a couple hundred hours a year on our boats, so lack of use is often more of a problem than wearing out.
See ya on the water!