mariner 200 hp oil question?

[macattack89]

just bought a 95 hurricane deckboat with a mariner 200 hp outboard. how can i make sure the oil injection is working properly? and i have heard about a horn(alarm) going off if oil isnt getting injected? thank you

 

[macattack89]

Re: mariner 200 hp oil question?

anyone?

 

[1nebel0]

Re: mariner 200 hp oil question?

We always buy the dummy plug that takes the place of the oil pump and cap it off...we them put a pipe pluy on the starboard front of motor and block off the vacum fitting that pressureizes the oil tank..We then mix 50/1 in the tank..We always know that we have oil and will never burn a motor up due to oiling related problems such as a cracked hose, no oil in tank, or very rarely a bad pump...This is a must on motors spinning over 6500 which you won't but we do...didn't anser your question but gave you another idea...If you want put oil in the gas and then run you motor...yes you will be over oiling but you will see the oil go down on your on board tank that feeds the tank on the top of the motor...good luck

 

[N3UP]

Re: mariner 200 hp oil question?

The first step is to make sure your alarm horn is working.
You should hear a beep when you turn the key on.
If that's not working, fix that first.

I think the 200 may be a 2.5L, and I thnk that the 2.5's have a rotation sensor on the oil pump.
The 3.0's (225-250 HP) don't have the rotation sensor, they have only have an oil level sensor.

According to the manual for my 225 HP mariner, the oil level alarm is supposed to sound when the oil tank under the cowl is low, leaving enough oil for approx 30 minutes, if I remember correctly.

There is a test procedure in the shop manual (get a Merc/Mariner manual if you're going to work on it your self) to test the oil pump for both operation and sufficient flow.

Until you're sure, pre-mix 50:1.
You should be able to run it from a portable tank so you don;t have to mix a whole tank full until you verify the pump operation.

A quick and dirty check for the oil system is to run the motor on the muffs, and loosen the cap on the motor tank (the one under the cowl). Watch for oil to overflow out fo the tank. This verifies that the motor is pressurizing the boat tank and pushing the oil up to the motor.

Then mark the oil level on the boat tank and run it in the water for an hour or so. Then check to see if the oil level drops.

The oil systems on those mid-late 90's 2.5 & 3.0's are pretty reliable.

If you're hell bent on taking it off, do it correctly.
There is a bit more involved than plugging a hose and premixing.

Personally I would check it (or have it checked) and get it fixed if it's broke, or run it if it's OK.

I always hated pre-mixing, and when it's working properly, you'll use less oil. (unless you run WOT all the time)

If you make a habit of checking and topping the tank, you won;t have to worry about running out.
My boat tank holds 3 gallons, which is enough oil for 150 gallons of gas atleast. My tanks are only 88 gallons total. As long as I top off every time I fuel up, I should never run out of oil.