Re: Decarb Optimax
We used to do that to our cars back in the '50's. I remember a product named Alemite CD2 that we used. Sometimes we used Caseite and other times just kerosene or diesel.<br /><br />We'd pop the air cleaner off and with the engine at operating temp, pour the stuff down the carb till the engine gagged. Work it through (lots of white exhaust), revving her up so she wouldn't die and all, till the can was gone. <br /><br /> Worked good, but that was with leaded gas and most of the impurities in the combustion chamber were from lead deposits.<br /><br />One thing I will give you . I remember when OMC first introduced the looper and the (only 2) wedge shaped piston ring(s) back in '67 as I recall. Merc and others still used regular square rings (3).<br /><br />In looking at my '02 service manual the other day, I noticed that my looped 90 hp Merc also uses wedge shaped rings (also 2).<br /><br />So to get the wedge to do what it's supposed to the ring has to stay active......and most engines are loopers nowadays (B4 the 4 strokers). Must be the logic behind DeCarb whereas the regular rings weren't that sensitive.....maybe, but I dunno.<br /><br />Mark
