Join Date: Nov 2009
Location: georgia's toe-nails of the foot hills
Re: Aberdeen87....B&S help needed
What color was the smoke? If black, you are likely having a carburetor problem where the fuel level in the bowl is getting too high. Could be the bouncy-bouncy of tilling, or could be a worn float needle valve allowing fuel to raise too high.
If blue, it's likely oil. That could be level related. I think these B&S need the oil level checked while level, which is not fun on a tiller(how do you make it stand up level?). The oil should be at the 'notch' in the threads which the filler cap screws into, or the bottom of the threads if there's no notch, or on the hash marks if it has a dipstick. If too full, it will cause too much oil to get onto the cylinder walls for the 'oil control' rings to push it back down into the crankcase.
Sometimes engines that have been allowed to grow lazy, and sit around a shed for long periods of time(tillers... used in the spring, put away wet), will have sticky oil rings. Changing the oil, or using some ATF in the crankcase and running until hot will sometimes loosen the rings if they are gooey in the grooves of the piston. Even taking things apart, cleaning the piston, rings, etc, and putting back together can make the thing start to run better and lessen oil consumption and that bad habit of smoking while on the job.
They were designed for using straight 30W oil, detergent or not, and may consume more lube than normal if multi-grade oil is used. So, 10W30, 5W20 or 5W30 are not really the oils to use in normal summer weather. If you decided to get an early start, and till when it was cold, they would be fine. I'd go with straight 30W in spring/summer.
Check the air cleaner also as it may be an 'oil bath' cleaner. They have a trough of oil at the bottom, and force the incoming air to 'go around a corner' near the oil. Generally, heavier particles, such as dust, will not corner well, and will get trapped in the oil, allowing clean air to make the curve and feed the carb. If overfull, or there's water in the trough upon which the oil is riding, you'll tend to starve the engine of air, and suck oil in with the incoming air. Blue in two... seconds of operation..
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