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Old 03-27-2005, 12:48 AM   #1
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Default Why aren't there aftermarket parts to increase outboard horsepower?

There is no shortage of aftermarket parts for your car, diesel truck, motorcycle, snowmobile, jetski, etc. Parts range from simple/inexpensive air cleaners, to complex/costly computer chips and turbochargers. Many of these add-ons increase horsepower without voiding the factory warantee.

There are all kinds of marine parts designed to increase performance, like hydrofoils and fancy props, but why doesn't anyone make aftermarket parts that actually increase horsepower in outboard motors? There would seem to be an obvious market for such devices. And, considering the fact that many horsepower ratings are achieved on identical engine blocks, I doubt these add-on parts would be overly difficult to design. What's the deal?
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Old 03-27-2005, 01:01 AM   #2
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

because they blow up enuf without us messing with them....
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Old 03-27-2005, 01:05 AM   #3
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

I don't think there is a whole lot more that can be bolted on to outboards to give them that extra go. They are already pushing the envelope with the design that comes stock. Things can be added to help a little. You have different exhaust tuners, low water pickups on the lower unit, different gearing in the foot, torque shift props, there is at least one set of heads for the 2.5 Merc's that did amazing things for the engines without any extra port work. Any other things would be of the machine shop work on the block, which is going to greatly reduce the dependability and "life cyle" of the engine. They even make nitrous kits that are a bolt on addition that can really get the thing spinning, but how long do you think that will hold up on a fishing boat?
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Old 03-27-2005, 06:01 AM   #4
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Quote:
gersly - 3/27/2005 1:01 AM

because they blow up enuf without us messing with them....


No personal experience(yet), but this seems like
a very good reason
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Old 03-27-2005, 06:13 AM   #5
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Maybe we can convince Superchips to come up with a Dyno program
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Old 03-27-2005, 06:15 AM   #6
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Ever remove the cover off of an outboard? Where you gonna put an aftermarket part?

You will soon see more "aftermarket" power enhancing add-ons from outboard manufacturers such as we have seen from Mercury on their Verado.
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Old 03-27-2005, 06:15 AM   #7
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Quote:
Dan in Alaska - 3/27/2005 1:48 AM

There is no shortage of aftermarket parts for your car, diesel truck, motorcycle, snowmobile, jetski, etc. Parts range from simple/inexpensive air cleaners, to complex/costly computer chips and turbochargers. Many of these add-ons increase horsepower without voiding the factory warantee.

There are all kinds of marine parts designed to increase performance, like hydrofoils and fancy props, but why doesn't anyone make aftermarket parts that actually increase horsepower in outboard motors? There would seem to be an obvious market for such devices. And, considering the fact that many horsepower ratings are achieved on identical engine blocks, I doubt these add-on parts would be overly difficult to design. What's the deal?
It's pretty simple actually.

Liability.

If a car engine blows, chances are you can still get home.

If your boat engine blows while your out 40 miles you might have a little problem.
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Old 03-27-2005, 06:24 AM   #8
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

I think Gersly hit the nail on the head. These OB's blow up enough.
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Old 03-27-2005, 06:26 AM   #9
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

We had 2 sets of 200 mercs ported and balanced The pistons and rods were lighten to within a gram on a rod balancing jig similar to what comp cams now sells is it worth it definitly those engines never loaded up touch the throttle and zing and the fuel burn didn't increase until you got a heavy hand they were on a 23' secraft only the boats with numbers would beat us in the ocean back then now the new direct inj. you have great response you have great fuel economy we cleaned the carbs every week pulled the plugs when we cleaned the carbs and bought alot more fuel But when you listened to those things idle you knew they were different . All this work was done by grandfather,father and uncle they built and raced modifieds before I was old enough to fish they just couldn't be satisfied with good enough I guess thats were I got it from
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Old 03-27-2005, 06:34 AM   #10
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Here is the argument I give to my 17 year old who likes to play backyard mechanic to squeeze extra hp out of his 2 stroke bike.

"What makes you think that you & your schoolyard friends know more about engines & how to make them better than the manufacturers who spend millions on R & D? Did you ever notice that high performance engines require constant maintenance & do not have the durability of a 'detuned' motor?"

He has not learned this lesson yet & he is paying for it dearly. Some day he will learn, don't fix what ain't broke.
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Old 03-27-2005, 08:19 AM   #11
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

You just need to know where to look for what is available. Try screamandfly.com best performance site on the web.
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Old 03-27-2005, 01:37 PM   #12
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

There are aftermarket parts for Mercury mostly.... that's about it.
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Old 03-27-2005, 01:50 PM   #13
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Also much smaller market that for automobiles.
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Old 03-27-2005, 03:03 PM   #14
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

The result of "add-ons" is merc's VERADO. Pure and simply hopped up by adding a blower and a stronger fuel injection pump. So what else is new?
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Old 03-27-2005, 05:55 PM   #15
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Quote:
horseradish - 3/27/2005 4:03 PM

The result of "add-ons" is merc's VERADO. Pure and simply hopped up by adding a blower and a stronger fuel injection pump. So what else is new?
Uhhh, the Verado is unlike any Mercury outboard there is. The power head is a completly new design from anything else that they have. It's a lot more than bolt on's. It's also been tested to signifigantly more power than they sell it at.
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Old 03-27-2005, 09:07 PM   #16
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Ground effect lights, bullet mufflers and
bow thrusters that make the bow
jump up and down! Just like the kids
in their 4-6 cylider "muscle cars"!
Add a too loud sound system
blasting rap crap....

That's why!
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Old 03-28-2005, 01:04 AM   #17
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Open your wallet real wide !

MAD EFI

Merc and OMC !

and forget any warranty !
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Old 03-29-2005, 04:01 AM   #18
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Doug,

He will definitely learn some lessons but I wouldn't discourage him. Some of my best times as a kid were spent messing with old two strokes - both street and dirt bikes. There are a lot worse ways for a young man to spend his time!

I still miss my Suzuki GT550 air-cooled, two-stroke street bike - That beautiful sound of winding that thing up...ring, ding, ding, ding, ding...riiiiinnnnggggg.
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Old 03-29-2005, 05:59 AM   #19
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

Added a Powercommander to my 04 Yamaha FJR1300. On dyno testing a went from 146hp at the wheel to 162hp. The small computer changes the fuel air mix. So far I've ridden the bike about 12,000 miles with out any problems. Many bikers do the same thing. If they can make it work for a bike engine, why not a boat engine. If your wondering it was $142.00, which included a custom map for the FJR and a USB cable to hook to my PC for any mods.

http://www.powercommander.com/
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Old 03-29-2005, 07:49 AM   #20
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Default RE: Why aren't there aftermarket parts to increase outboard horsepower?

There are many "hop-ups" available for outboards. You just have to know where to look. Not nearly the same volume as auto industry, but they are there.

Jay Smith Racing, Brucato, and others have all kinds of bolt-on goodies available, from adjustable pcu's, ignitions, high perf. injectors, NOS, velocity stacks, exhaust kits and more.
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