shurik_muff Posted June 17, 2011 Report Share Posted June 17, 2011 hello guys. just rebuild the motor, 2scl, 3 cilinder. motor has oil pamp already. i was told the first fill up or so, to mix the gas as well, 50:1 ratio. now every time the motor is cold, after 2-5 minutes, one of the cylinders blows the spark plug. i change 3 already in 2 days. can some one confirm that incorect mixture can cause this problem? i asume, mixture at the moment is 25:1, due to pamp mixing 50:1 and gas tank is also mixed 50:1. thanks again Link to comment Share on other sites More sharing options...
Muskieman Posted June 17, 2011 Report Share Posted June 17, 2011 Year , Make, Model,HP of outboard? Sounds way to rich... go back to the 50:1 and throw in 1/2 a can of Seafoam for good measure I put that S#%T in everything !! Good Luck .. Eh! Randy Link to comment Share on other sites More sharing options...
Big Cliff Posted June 17, 2011 Report Share Posted June 17, 2011 hello guys. just rebuild the motor, 2scl, 3 cilinder. motor has oil pamp already. i was told the first fill up or so, to mix the gas as well, 50:1 ratio. now every time the motor is cold, after 2-5 minutes, one of the cylinders blows the spark plug. i change 3 already in 2 days. can some one confirm that incorect mixture can cause this problem? i asume, mixture at the moment is 25:1, due to pamp mixing 50:1 and gas tank is also mixed 50:1. thanks again What do you mean by "blows the plug"? Who told you to mix oil with the gas? What grade of plug are you using? Link to comment Share on other sites More sharing options...
Handlebarz Posted June 17, 2011 Report Share Posted June 17, 2011 my old 1962 sea king was 25:1 Link to comment Share on other sites More sharing options...
ecmilley Posted June 17, 2011 Report Share Posted June 17, 2011 (edited) need the year make model for sure, but with most outboard 2 strokes a gas/oil mix as well as the injection is recommended for the first tank just to confirm the oil pump is functioning. I am currently running my engine at a 25:1 ratio for break in and having no issues with any fouling; you have a pic of the plugs do you? Edited June 17, 2011 by ecmilley Link to comment Share on other sites More sharing options...
bigbuck Posted June 17, 2011 Report Share Posted June 17, 2011 Make sure you are using the correct spark plugs. Consult your owner's manual or contact the manufacturer. I'd go with good quality oil as well, not the cheap stuff, esp. for break in. Link to comment Share on other sites More sharing options...
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