70'S 9.5 johnson

[jburkeen31]

I have a 9.5 omc and I just rebuilt carb and replaced fuel pump it ran fine.went to the lake it was hard to start but I got it started it ran good I shut it off for about an hour fished alittle and started it back up one pull.
Went to another spot shut it down fished for about 20 minutes started back one pull again do it again started back to boat ramp and I put it in slow it died.a mechanic told me it is an old motor and to add more oil to gas could that be the problem I have 32 oz oil to 6 gallons of gas

 

[ezeke]

Re: 70'S 9.5 johnson

The 9.5 motors have always used 50:1 or 16 ounces of oil for 6 US gallons of gasoline.

#32 ounces is more oil than ever required except for break-in after a rebuild.

Try using Champion J6C plugs.