Considering Re-re-Power: Am I Crazy or What :|

[beene]

My Merc 50 HP = 228 lbs.

Thppppppp.

Yep
But a 50/60 with less than 800cc vs my 1600cc just doesn't cut it for my needs


G

[beene]

I was going to ask what the offsetting beneficial result would be of dropping down in weight by going smaller. Is there not a significant downside to hanging 400+ pounds back there when the design was for closer to 200?

I dont not agree the design was for 200lbs.

After I installed my 75, one of the largest volume dealer of the Mac in North America started outfitting their Macs with 70hp motors.

I posted videos
My results
Showed how I installed transom wedges as the angle on its own is not enough
Showed my aluminium plates I installed to add strength for the extra hp and weight
All has been replicated by many since then

Several owners on this sight have subsequently installed 90's and even 115 on their boats.

One had installed a 150 2 stroke on an X I believe long before I installed my 75

The M was built tougher than the X, and its motor well can take the extra load

I had a 7.5 before my 75 and I can also tell you the increased wt does not hurt the sailing speeds much at all.

Its like saying, I better sail solo all the time to maximize my sailing speed

I guess if you were in a race, which I am not, you would care about the extra .001 of a kt lost with the extra engine wt

Bottom line on installing a larger motor, to each their own.

If your needs do not require higher planing speeds on glass like water, then get a smaller engine
If you feel the need to maximize the potential of your current boat choice, then get a larger engine.

If I had the cash, the motor of choice for me right now would be the etec 135 HO

This is based on my experience with my 400lb 1600cc engine I have been using on my M since 2006.

G

[beene]

So about over powering a hull that's already marginal to begin with...
What type of transom upgrade must be done to mount that 135 motor on there?
What about the bottom where the boat first hits the waves? Is that thick enough to handle the extra speed?
Ix

I do not consider the Mac hull to be marginal

I installed aluminium plates to reinforce my choice of OB

As far as bottom and hitting waves, it is the responsibility of the captain to ensure safety on his vessel.
Driving on any boat at high speeds in heavy seas is irresponsible.

When the seas dictate, I slow to max sailing speed, all fins down, full ballast.
Therefore there are no waves crashing the bottom of the hull, she just glides along on a nice smooth plane.

I only want max speed performance from my M when conditions allow.

G

[beene]

[quote="Gazmn"
Beene: Brother, ur opening up a Whole can o' Whoop ass introducing a 420# V6
I wouldn't be that far away weight wise @ 390... It's more a dollar & "sense" (transom & sinking aft) issue, for me anyway. Besides, I'd "pass go" & stop at the 'buck fifty

I think the elephant just farted in the room & now we can't ignore that, triple digit HP should be on the table to anyone considering repowering

[/quote]

Hey Gaz

The dif in wt is nothing to be concered about, trust me. With my 75 at 400lbs, she sits completely level with full ballast.
The 135 V6 is just 18lbs more, no worries

The head on that thing is actually smaller than my 75, so easier to board from the ladder

COST!!!

That is the only factor stopping me, and you most likely as well.
A new 135 would be very expensive.
My 75 was 3,299 used from iboats.com
Can't believe I got that deal
Never again have I seen that good of a deal from them, close, but not as good.
How could I justify selling my 75 and moving up to that 135
I can't!
I wish my 75 would die, but it just keeps on going...
Every year I store it for 7-8 months, take it out the next year, put on the muffs, and she fires up like I never put her in storage at all.
Damm
Oh well
Maybe someday...

G

[beene]

Short of running from storms, I find this quote also true:

All that being said I still tend to run at 6 knots 90 percent of the time because running with very little noise is so much nicer and the journey is as much fun as the destination.

-DarNJ

Then again sometimes I have ADHD...

I feel like Quint in Jaws when he's banging on the throttle trying to will his boat to go faster -just before it breaks down...

This is the closest I've seen to my #'s & I'm not that happy

http://www.evinrude.com/Content/Pdf/neu ... /PE629.pdf

Aside from my kids wanting to get into water sports, I primarily want the extra speed for 1 thing.
I will sail much farther out then any other sail boat out there with me before I turn around and head home.
If their goal is the same as mine
And in my experience, it usually is
A day sail, or aft/evening sail
With the intent of going out for the day, and return before sundown

Picture this
Several sail boats head out
Nice day for sailing
We all leave around noon
Sail out as far as we can
But we all have to keep one thing in mind
We want to be back by sundown
So, conventional hull sail boats must take into account max hull speed, wind or not
As a result, they divide their day in 2
Half the say out, half the day back, sailing or powering when the wind dies
I on the other hand will sail all day out, and power back at 3 or 4 times my sailing speed.
Covering 3 to 4 times the distance I would using their rules
As a result, I see much more each sail then they ever do.
I have sailed many different boats, the one thing that always kills me about them is their max hull speed.
The wind dies, its painful. You cant outrun the bugs, bad weather, or make it home for dinner.
You just have to put up with putting along with your diesel at 3000 rpm max, fighting the current sometimes making 1,2,3 kts headway....
Shoot me now...

G

[Seapup]

Your 18mph sounds not too far off for your heavy boat with bottom paint IMO. I bet you would only have about 10-11 mph with a 50 while others report 18. Your motor has checked out fine so a new 90 may gain you a mph or two, but I doubt it would be a drastic change. Much more speed is going to take more hp or stripping it down and waxing the bottom.

[dlandersson]

You and Bill Cosby - he needed a car that did 200 MPH to go to work.

http://www.youtube.com/watch?v=3-JQksYxgM0

My Merc 50 HP = 228 lbs.

Thppppppp.

Yep
But a 50/60 with less than 800cc vs my 1600cc just doesn't cut it for my needs


G

[Starscream]

Your 18mph sounds not too far off for your heavy boat with bottom paint IMO. I bet you would only have about 10-11 mph with a 50 while others report 18. Your motor has checked out fine so a new 90 may gain you a mph or two, but I doubt it would be a drastic change. Much more speed is going to take more hp or stripping it down and waxing the bottom.

Or some of this? http://www.fasterwithseaslide.com/
It's on the internet so it must be true. Have to admit I'm tempted.

[SENCMac26x]

Your 18mph sounds not too far off for your heavy boat with bottom paint IMO. I bet you would only have about 10-11 mph with a 50 while others report 18. Your motor has checked out fine so a new 90 may gain you a mph or two, but I doubt it would be a drastic change. Much more speed is going to take more hp or stripping it down and waxing the bottom.

I have a Yamaha 70hp and a 2002 26x with bottom paint. With a crew of 2 (and I'm a heavy guy) I regularly hit between 18-20mpg (depending on the current/wind)

Without I see speeds close to 24-25mph.

[beene]

Thanks to K9

This video is EXACTLY why bigger is better....

(wait for 53 sec in...

http://www.youtube.com/watch?v=TJuRomDv ... e=youtu.be


http://www.youtube.com/watch?v=7Bn47Z6U ... GDqb00MTYw

hehe

G

[Tomfoolery]

And don't forget this video. Pegasus outrunning my puny 50 hp Tomfoolery. Lucky for me, I have a white hull, or it would have been worse.

https://www.youtube.com/watch?v=LK-baNqcbss

[Highlander]

Geff & I having some fun playing chase !
http://vid844.photobucket.com/albums/ab ... 010002.mp4

J

[beene]

And don't forget this video. Pegasus outrunning my puny 50 hp Tomfoolery. Lucky for me, I have a white hull, or it would have been worse.

https://www.youtube.com/watch?v=LK-baNqcbss

I would love to see what your X could do with my 75 on her...

Heck I would give her to you if I could afford a 135...

G

[K9Kampers]

I think I am going to plug that cockpit drain-hole as well. Some sort of removable thing that I can put in easily when going out on a loaded boat. I wonder if I can tap a thread into the fiberglass or if I should just save a wine cork.

DO NOT use a wine cork! I tried that one winter in the motor well drain hole. Getting it out in the spring was a be-yach! Frozen stuck, broke apart removing, drill/ punch the rest thru... had to disassemble the drain plumbing inside the transom. Use a rubber flip or screw type drain plug like at the ballast vent - if it fits.

[beene]

http://www.stongerecreation.com/all-boa ... &&&type=2&
http://www.evinrude.com/en-ca/engines/p ... 50_pontoon
hmmmm....

150 HP
Built to be a pontoon engine
INTRODUCING THE ONLY PONTOON ENGINE BUILT TO BE A PONTOON ENGINE. This is the first outboard engine built specifically to address the needs of pontoon owners. New features include rubber motor mounts to reduce vibration transmitted to the boat and special gear ratios and large displacement cylinder blocks which provide abundant torque and high thrust. In addition, the Pontoon Series still offers all of the best-in-class features of the entire Evinrude E-TEC lineup.

150 HP - Model-specific elements
Same head and wt as the 135....
MODEL WEIGHT SHAFT LENGTH
E150SNL 418 lbs /
190 kgs 20" /
635 mm
Common Elements
Limited Warranty 3-Year, Non-declining
Engine type V6 60° E-TEC DI
Displacement 158.2 cu in/2591 cc
Recommended fuel 87 Octane
Emissions compliance CARB 3 Star, U.S. EPA, European Union
Recommended Oil Evinrude/Johnson XD100™ Oil
Propshaft HP 150 HP (112 kw) @ 5650 RPM
Full Throttle RPM Range 5300-6000 RPM
Alternator output 133 Amps Total Output/ 50 Amps Net Dedicated
Fuel induction E-TEC DI w/ Stratified low RPM combustion mode
Lubrication Multi-point, targeted oiling
Bore x Stroke 3.6 x 2.588 in / 91 x 66 mm