Oil Injection Questions

zonaman

zonaman

Petty Officer 2nd Class
Joined
Apr 1, 2005
Messages
118
I've got a 2000 Johnson 90 hp with the oil injection system in it that I'm getting ready to put on the water for the first time.(since I bought it) I noticed that the manual indicates running 50:1 in the gas tank after the hose has been disconected along with the oil drwn from the oil tank. It also recommends the same for "high perfromance operation."

What would be considered high performance operation? Are there any noriciable downsides to running oil/gas in the tank as well as drawing from the oil injection tank? Seems like that might be a smokie or something.

Thanks.
 
M

Mike2076

Cadet
Joined
Apr 9, 2009
Messages
28
Re: Oil Injection Questions

Hello,i allways unhook the oil injection and just run 50-1 premix on the older engines i work on,some people like oil injection if your systems good you can run the injection,but you dont want to run both.I hope this helps Mike
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Oil Injection Questions

Mike is respectfully disagree, on break in, you run both, after sitting for a period you run both, this ensures the motor is getting oil, just incase the oil side fails, or other complications with the oil side.

i agree with you on the older motors with VRO and Vro2 pumps, need to be disconnected, the 2000 has the OMS pump, which is much more reliable.

normal usage is not high performance, down side is you get a little more smoke at idle, use synthetic TC-W3 and cut down the smoke.

once you know your OMS is working properly, then you can quit mixing.
 
C

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,142
Re: Oil Injection Questions

If you have any doubt about the OMS system run a 6 gal tank of premix and see if the oil in the revoir drops in level. if it does, you are likely OK. it would not hurt to test all the warning systems (low oil in tank, no oil at OMS pump, overheat). The V6 motors of that vintage also had a Check Engine alarm which was a fuel restriction warning. I do not know if your V4 received this alarm.
 
zonaman

zonaman

Petty Officer 2nd Class
Joined
Apr 1, 2005
Messages
118
Re: Oil Injection Questions

Chris1956 said:
If you have any doubt about the OMS system run a 6 gal tank of premix and see if the oil in the revoir drops in level. if it does, you are likely OK. it would not hurt to test all the warning systems (low oil in tank, no oil at OMS pump, overheat). The V6 motors of that vintage also had a Check Engine alarm which was a fuel restriction warning. I do not know if your V4 received this alarm.
Click to expand...

Apparently, the warning guage was never installed. There's a multi- connector that's got nothing to plug into. I assume that's for the guage which was either a stand alone or incorporated into a tachometer. Anyone know if you can still get those for this motor and how much?

Thank you!
 
E

ezeke

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