Oil Injection - Why don't we like it?

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EvanB85

Team Poseur
Location
Tacoma, WA, USA
Ok, I understand that there are not two sides to this debate. Oil Injection is the devil and the first thing to go. I can come up with a couple reasons why:

- One more thing to go wrong
- Added weight (for those of you with ski anorexia)
- Limited flexibility (for changing ratios)
- Essentially unnecessary

But is there anything that is a true negative aspect? Design flaws?

How do I explain to my buddy with a perfectly reliable, stock ski that he should start premixing?
 
mekanic305

mekanic305

Thanks for the rain in GA
Location
ATL, GA
WaveDemon said:
when it fails you lose a motor.
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werd...conventional wisdom tells people that not having to go thru the hellacious task of calculating the ratio and measuring out oil is harder than just dumping stuff in containers. Do the calculation for him and tell him what to do and I'm sure he'll come around. :biggthumpup:
 
the only couch rider

the only couch rider

Location
Jersey
everything is prone to failure... it takes operator error and and mechanical error out of the equation

if you are using oil injection and you run out of oil you will toast the motor... if the oil injection fails, you will toast the motor

if you are running premix, you don't have to worry about the oil injection system failing or running out of oil
 
Boris

Boris

The Good Old Days
Location
The surf-less coast
The way I see it there is an upside to running oil injection.

If the pump gives out, the linkage fails or a line pops off you have a chance that the top end will seize before any crank damage occurs.

So what's the upside you may ask ?
I like to buy skis with blown motors for penny's on the dollar.
 
the only couch rider

the only couch rider

Location
Jersey
Boris said:
The way I see it there is an upside to running oil injection.

If the pump gives out, the linkage fails or a line pops off you have a chance that the top end will seize before any crank damage occurs.

So what's the upside you may ask ?
I like to buy skis with blown motors for penny's on the dollar.
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:haha: :sneaky: :haha:
 
Jetaddict

Jetaddict

9 years to retirement...
Location
Tampa Bay
I ran oil injection on my 94 WB1, and have owned many oil injected boats for years. Never had an oil injection system fail. Can it happen? Sure. Is premixing failsafe? It depends on mixer-error. I premix in my 96, primarily because I can control the mixture and it may extend the life of my motor. I have gotten used to doing it now; it is a little bit of a pain, but it's not a big deal. I'd say if your friend has a new ski, it's dependable, and it runs good, leave it alone. If he is going to do work to it, or plans on running a little crazy with it (jumping, freestyle, whatever), then ditch the system. It's lighter, less stuff to break, and he can better control the amount of oil his motor is being bathed in.
 
WaveDemon

WaveDemon

Not Dead - Notable Member
Location
Hell, Florida
jetskier79 said:
When your crank fails....you lose a motor.
When a rod fails...you lose a motor.
:rolleyes:

For the casual rider.....they work just fine.
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no chit jerry, when an internal engine part breaks you loose a motor. it's the cracked oil line causing the motor to lock up I have a hard time with.
 
jetskier79

jetskier79

I'm goin' for two
Location
San Diego, CA
WaveDemon said:
no chit jerry, when an internal engine part breaks you loose a motor. it's the cracked oil line causing the motor to lock up I have a hard time with.
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I think that's the deal though, people have a hard time coming to terms with the simplicity of the problem and the extent of the damage something so simple can cause. Consider this though.....how complex of a problem is a ring snagging? Or a wrist bearing letting go?

I suppose the difference is that, to an enthusiest rider.....mixing gas is no big deal, and is definitely the way to go - peace of mind and cheap insurance. Trust me, I'm not running any oil injection motors anywhere. But the point is, for your every day rec rider.....there's not much wrong with it. The likelyhood of it's failure is slim.
 
Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
I would add that the chances of the "casual rider" somehow farking up his mix calculations somehow might well be greater than the chance of the oil pump failing.
 
meatball

meatball

User Title Unavailable
Location
Maryland
I dunno, 13 ounces per a five gallon tank is pretty easy, or 16 for 40:1. If you have multiple riders, one of them may let the tank go dry, as my neighbor did with their 2-stroke outboard :rolleyes: blonds

Normally its not the pump itself that fails, but rather a seal, or most commonly a line either cracks, or falls off.
 
Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
meatball said:
I dunno, 13 ounces per a five gallon tank is pretty easy, or 16 for 40:1.
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1.) You're not a casual rider, and you do that calculation often.

2.) Your casual Seadoo'er will screw it up before the oilpump, and proceed to blame it on the motor.
 
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