[martcol]

Just been given a 5HP Mariner. Very happy. It says 661 L305745 on it, which I think looks like 1978, but no details on ful mix. Reading the posts, I'm pretty certain that it's 50:1, but would appreciate any educated opinions.Martin Coleman

[CARLOS]

YES MARTIN, NORMALLY 50:1 WITH TCWII OR TCWIII OIL.I´VE A 4HP MERCURY 1992 AND USUALLY USE WITH 50:1 AND IT IS PERFECT.THANKS CARLOS S.

[greasemonkeyozi]

The best 2 cycle oil for mercury motors is quicksilver. Use 50:1 ratio, thats 16 ounces of quicksilver with 6 gal. fuel

[martcol]

Many thanks for your help guys - I'll try it this morningMC

[Dan in MASS]

I have just gotten a 1997 Mariner 5hp. What mix ratio does it use ? Is it 50:1 also ?Thank you .,Dan :o

[ZmOz]

50:1 is what is recommended by mercury, but 40:1 would be a much better idea. There is no reason not to...