VRO

[pineiroj]

I have an 87 evinrude 120 4carbs with VRO disconnected running at 50:1 runs great wide-open loads up during idle. Checked plugs, compression, cleaned carbs made sure throttle valves is closed at idle adjusted needle jet screws. I have seen several posts were everybody has problems after disconnecting VRO. I understand that when in an idle mode the VRO changed the mixture to 100:1. What can I do to fix this very frustrating problem.

 

[clanton]

Re: VRO

Only the very early VRO. The pump with the little tag that said VRO2 pumped 50/1 all rpms. The omc school in sunrise was teaching 50/1 1989. Upgrade kits that were made availabe to first owners for 69.00 in 1989 pumped 50/1. I here that later 95/96 may pump 60/1. I have never seen a service manual that gave this spec. I liked to see what the new company does with the VRO.

 

[12Footer]

Re: VRO

In the meantime,try switching brands of oil.What were the results of the compression test? You might find the return hose is clogged.Just a guess.

 

[pineiroj]

Re: VRO

Compression in all cyclinders 120 . I do have orginal VRO2 pump. Any suggestion for the best plug champion type ?