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New motor Yamaha 70 hp vs 75 hp

8/3/20 @ 9:30 AM
ORIGINAL POST
connor
User since 9/17/01

I have a 2001 tracker pro deep v 16.5 Console with a 2001 mercury 2 stroke, boat max rated at 75 hp. I am thinking about replacing the motor with a Yamaha 70 or 75 four stroke.There is a considerable weight difference and price difference for that matter between the 70 and 75 hp Yamahas . Anyone care to weight in on pros or cons?  I’m leaning toward the 70 hp.

Boat would spend most of its time on a flowage 1400 acres lots of stumps etc so only occasional long WOT situations.

DISPLAYING 1 TO 10 OF 20 POSTS
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8/6/20 @ 7:02 PM
Plmlk
Brent Hess
MEMBER since 12/18/07

Yami’s are awesome motors nif, you can’t go wrong! 

The Woodlands Resort
(262) 661-3968
8/6/20 @ 11:38 AM
nihsif
nihsif
MEMBER since 6/15/01

if there was a 70 eTEC when I bought my boat, I would have got that instead, but the new ( I think 2nd year )  Yamaha 70fla maxed out my 2012 competitor 165 tiller and was lighter or comparable to available 2 strokes... it has been a very good choice for me

"YAMAHA’s newly released F70 four-stroke marks a further continuation in the evolution of light, powerful and fuel-efficient outboards. According to Yammie, the inline four cylinder F70 is an enhancement of the Japanese engine maker’s popular F60. It shares the same displacement (996cc) and is only marginally heavier (10kg) than the F60. But the F70 differs from the F60 via its a unique engine design. Unlike other 16 valve engines, the F70 operates via by a single, not dual, overhead camshaft. This gives it a weight advantage over its competitors in the 70-75hp class and also increases performance. "

http://www.fishingworld.com.au/news/fuel-miser-tested-yamaha-f70-four-stroke

...other 4strokes now are lighter yet ... but if given a chance at the time, I would have gone eTEC

 

8/5/20 @ 7:24 PM
Plmlk
Brent Hess
MEMBER since 12/18/07

I’m a bit puzzled how a 4-stroke weighs less than a same size 2-stroke, as that typically isn’t the case.

But it is what it is I suppose...

The Woodlands Resort
(262) 661-3968
8/5/20 @ 6:56 PM
BâssÂddîçt ©¸
BâssÂddîçt ©¸
MEMBER since

if was the mercury 2 stroke 75hp-90hp 139kg  or 306 pounds  would be same as under tracker name mercury made them right

yam 70 4 stroke 253 lbs

my e-tech 90 is 320 lbs

8/5/20 @ 5:20 PM
Plmlk
Brent Hess
MEMBER since 12/18/07

I think a better question is what did his old motor weigh, and what would a new motor weigh, and what is the weight rating on his transom? 

The Woodlands Resort
(262) 661-3968
8/5/20 @ 10:58 AM
BâssÂddîçt ©¸
BâssÂddîçt ©¸
MEMBER since

Yes it's all motor is a 2 stroke he wants to replace it now with a 4-stroke plum

70 horse or a 75

I was just showing the weight differences of the two 4-stroke motors

8/5/20 @ 7:28 AM
Plmlk
Brent Hess
MEMBER since 12/18/07

His old motor was a two-stroke BA not a four stroke

The Woodlands Resort
(262) 661-3968
8/4/20 @ 9:45 PM
BâssÂddîçt ©¸
BâssÂddîçt ©¸
MEMBER since

Mercury 75 four stroke

Specifications - 75

HP / kW75 / 56

Gearcase ratio2.07:1
Dry weight *Lightest model available359 lbs / 163 kg
CARB star rating3
Bore and stroke3.5 x 3.2" / 90 x 81 mm

8/4/20 @ 9:42 PM
BâssÂddîçt ©¸
BâssÂddîçt ©¸
MEMBER since

Yamaha 70 4 stroke

MIDRANGE 70 hp

Our 1-liter 70-hp midrange features a two-piece upper case and 10 percent lighter pistons. It’s up to 80 pounds lighter than other four-stroke competitors and the class-leader in power-to-weight. Combined with its 16-valve SOHC design and 17 percent larger intakes, and it’s one of the most responsive outboards on the water.

  • Available for mechanical remote or tiller control
  • Only 253 pounds
  • Available in a 20” shaft
  • Powerful 17-amp alternator
  • Optional Variable Trolling RPM Switch (VTS®) via the Multi-Function Tiller Handle, Command Link® tachometer or helm-mounted remote VTS

8/4/20 @ 8:41 PM
mattw
mattw
User since 5/6/16

I was in a similar situation with the   Skeeter  I had , there was  70hp  evinrude and was looking into repowering it with the Yamaha, that new 70 horse if I remember only weighs about 260 pounds , check the specs on your Merc and see if they weigh the same then you know which one to pick. If I remember the Yamaha was about the same weight as my 1984 Evinrude 70 hp 2 stroke . You really not gaining much on a 5 horse difference,  I would be more concerned about weight . 

DISPLAYING 1 TO 10 OF 20 POSTS
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