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How do I prime the carburetor with oil injection?

C

chrisgt

Contributing Member
This may be a stupid question, curiously it is not addressed in either the user manual or service manual (ie. i may be overthinking this...).
I have a 1996 mariner 30 with the oil injection system, I have tested this to be working fine and that's not my issue.

I'm not new to outboards, but i am new to oil injected models and I fear when i squeeze the primer bulb I will be putting straight gas into the system since the engine isn't running the oil pump yet. I know that it's injected before the fuel pump, but won't I end up getting approx. one carb bowl full of leaner oil/fuel mixture to the carb after the engine is running?

As I said I'm probably vastly overthinking this one, i doubt anyone in the last 28 years of this engine's life even thought about it.
 
There is plenty of oil residue inside crankcase to prevent this. Just overthinking, install yer reeds and go fishing!
 
faztbullet said:
There is plenty of oil residue inside crankcase to prevent this. Just overthinking, install yer reeds and go fishing!
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Thanks for the confirmation! I'm STILL waiting on the gaskets and tab washer things... Hopefully this week. I think the package got stuck in the hurricane traffic, the devastation on the news looks terrible so I really can't complain too much.
 
Not a stupid question at all. You are just ignorant for the moment as to how the system works. As we all were at one time, and continue to be so for many many other systems.

When you pump the primer ball you are only filling the carburetor bowls. No gasoline is making its way on to the internals of the motor. A float in the carburetor bowl will close a valve when the carburetor is full of gasoline.
 
The fuel without oil goes into the engine.-----But there is lots of oil coating the parts inside the engine.-----No damage is done !!!-----Gasoline coming into the engine, via the pump will be mixed with oil.-----This is ( in my opinion ) more proof that oil and lubrication in 2 strokes is not well understood !
 
Is the Mariner made in Japan? Many were. If so, it is like a Yamaha 30.

Gasoline is fed into the air intake system. Right behind each carburetor, oil is injected into the intake system by an oil pump. Little bit of oil at idle. More oil as the throttle is opened up.

Result is no different that when premix is used. Just cleaner burn, less smoke, less oil wasted.

Here is what a Yam system would look like.

 
boscoe said:
Is the Mariner made in Japan? Many were. If so, it is like a Yamaha 30.
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My understanding is that it was until the early 90's when they stopped the partnership. The flywheel on this is made by briggs & stratton, further helping my understanding that it isn't a yamaha.

racerone said:
The fuel without oil goes into the engine.-----But there is lots of oil coating the parts inside the engine.-----No damage is done !!!-----Gasoline coming into the engine, via the pump will be mixed with oil.-----This is ( in my opinion ) more proof that oil and lubrication in 2 strokes is not well understood !
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I couldn't agree more, my whole life I just dump the correct amount of oil into the gas and never think about it; i'm always up for learning more about engines: do you have any resources or sites or anything that help explain this better?
 
Life is good until one forgets to put oil into the gasoline or forgets they already put oil in the gasoline and then adds more oil.
 
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