excess oil usage (1991 60hp Johnson)

[seafarer - australia]

after problem engine rebored and allegedly new oil pump (?) installed (mechanic now retired). Ever since I have had problems with excess oil usage and lots of smoke. I appear to be using approximately double what I should be, ie; 12 litres of fuel to 1 litre of oil - where I should be using 25 litres of fuel to 1 litre of oil. I am concidering returning to mixing my own fuel/oil, but before I do I would like to find out the reason behind the excess oil consumption and smokiness.<br /><br />I would like to know the following;<br /><br />1. Could the previous mechanic have done something to the oil injection system to allow excess oil to go through the engine.<br /><br />2. Can you adjust the oil flow into the injection system - If so how ?<br /><br />3. Are there any problems with disconnecting the oil injection system and reverting to mising own fuel/oil - If not, how is it done.<br /><br />On top of all this the engine itself seems to running fine with no other problems.

 

[G DANE]

Re: excess oil usage (1991 60hp Johnson)

Hi Mal 20146<br /><br />If you have some kind of restriction in your fuel supple lines, the vro system can supply a higher oil/fuel mix. Check if fuel flows unrestricted, i.exa by trying another portable tank.<br /><br />Have you checked by mesuring oil comsumption compared to gas, that this in fact is the case.<br /><br />Be aware VRO2 systems always mix 1:50, if you had an earlier version, mix could vary between 1:75 and 1:50. <br /><br />VRO system is easy to disable - do a search on VRO + removal, several threads gives exact procedures. Be sure to theck the overheat warning system as described after removal. Remember to Premix <br /><br />Happy boating.