OMC premixer

[imported_Billnoy]

I bought a 1993 circa boat recently that has an 8hp Merc 2 stroke motor in addition to a 115hp main.The small motor has an oil tank in line with the main tank (the 115hp has VRO)that I believe is a mixer.There are no identifying marks on it except the OMC on the cap.Are these things reliable? Should I pull it out and premix in a small tank?<br /> Bill

 

[rodbolt]

Re: OMC premixer

check with a BRP dealer, the old style portable tanks with the oil mixer I think were desiged for a 100/1 mix and I think that merc calls for a 50/1 mix. check both with a local dealer.<br /> the OMC mixer type tank had some issues if the tank and oil resevoir were not kept clean.<br /> knowing how most kicker motors get run I would use a 3 gallon tank with premix and what fuel did not get used dump it in the main tank at the end of each trip.

 

[WillyBWright]

Re: OMC premixer

As long as what's in there is all oil, they're great. If you allow condensation (or possibly rain) to build up on the bottom, it'll mix-in water instead of oil. That'll also happen if enough water collects in the boat to submerge the tank.<br /><br />When the oil level gets low, it shuts off the gas. That's a cool feature. A tank of oil would last most people a few seasons with that motor. It mixes at 60:1 which should be fine for that Merc.