I have a 1996 Evinrude 150 V6 intruder. I purchased the motor used and was told by the previous owner that the motor wasnít drawing 2-stroke from the reservoir and that I must pre-mix at 1:50 ratio (which I've been doing) and keep enough oil in the reservoir to prevent the reservoir low oil alarm from going off. I have only been out a handful of times and used less than 3 tanks of fuel. The motor runs like a dream Ė no hesitation on take-off and smooth through all rev ranges. On my last trip the low oil alarm went off indicating that the motor is drawing 2-stroke from the reservoir. I have a few questions.
How can I tell if my motor is drawing sufficient oil from the reservoir? (I obviously am reluctant to stop premixing if there is potential to damage my motor due insufficient lubricant.)
Does the motor draw a standard 1:50 ratio from the reservoir or does it adjust according to revs, etc? In other words, if I measure how much oil versus fuel itís using when idling on muffs on the slipway Ė will this be an indication of how much it will use under load on the dam?
I put in new sparkplugs when I purchased it and there is already a bit of carbon build up on them. Is this a result of too much 2-stroke?
Can I damage my motor (other than a bit of smoking at start-up) if Iím pre-mixing at 1:50 ratio and its still drawing lubricant from the reservoir?
Is it advisable to add any additives to prevent or remove carbon build-up and if so, how often should this be done?
Any advice would be much appreciated.