blue smoke out exhaust of 1969 85 evinrude

helfertyc1972 · #1 August 8th, 2003, 08:38 PM

does anyone else have the same engine with similar observation? Feul/oil ratio is 50:1, engine seems to be in good running order with lots of power, not missfiring or running rough. I notice when skiing behind boat, a small amount of blue smoke out exhaust holes, steady but minimal. This normal or perhaps carbs need further adjusting? Or early sign of other problems? ...Chris

rwise · #2 August 9th, 2003, 04:41 AM

chris

2 cycle engines smoke a little, or more.

Richard

alcan · #3 August 9th, 2003, 09:17 AM

Sound as if your motor is running perfect. Smoke is good.

oldboat1 · #4 August 9th, 2003, 11:38 AM

had the same motor ('70 model), and exhaust normally comes out of the two ports on the leg just under the powerhead -- a periodic spray/mist of cooling water is also normal(a bypass, as I recall). If the smoke is really heavy, you might be running a little rich (richer than a 50:1 gas/oil mix, or carb adjustments on the rich side.)

heyttown · #5 August 9th, 2003, 12:21 PM

Smoke is better then no smoke!