OMS ques.VRO?

[flyingscott]

And if you don"t believe me about the spring in there look on you tube plenty of guys taking them apart

 

[WernerF]

Yes, oiling is variable, at least a little. I don't think the oiling ratio is nicely linear across the trottle range, but it's definitely leaner at idle.
I beleive OMC wouldn't have dared to call it VRO if it's not a little variable at least.

You should be able to smell it. If you run at or near WOT for a while and then quickly return to idle, it will take some time for the 1:50 mixture in the carbs to be consumed and be refilled with a leaner mixture.

 

[WernerF]

BTW does anybody know where exactly the oil exitits the oil chamber and enters the fuel inlet chamber? Is there a special passage and a check valve? Or does the oil go through or around the oil piston? Maybe this helps to understand the mixing ratios.

 

[gwg]

Thank you to everyone who is offered explanations on how this system is supposed to work. After reading everyones explanations, and referred back to the pump operation, I learned a lot, and see that this system does vary somewhat, providing an average of about 60:1. this is a great system for someone who does a lot of idling.

Currently my boat is Not equipped with a system check gauge, or tach system check with the 4 led lights.
My motor is equipped with the 176349 wire harness for adapting 2000 150 Johnson to an older boat control box
With this harness will I still get all the audible alarms?
What kit do I use to up grade to the option of a 8 pin system check gauge? 176345 harness kit?

With gauge and upgrade kit, probably looking at $500 min.?

Or, should I just disconnect the OMS, and premix. I'm not doing a lot of idling or trolling?
If I was too run the OMS, I would definitely want to do have tach with alarm lights.

Any thoughts

 

[ondarvr]

You can probably get all the parts you need on eBay for not much money. It should all be plug and play.