Ryobi Garden - Page 4 - Popular Questions, Answers, Tips & Manuals
What fuel line goes where on Ryobi model#990r 4 cycle engine with a Zama carburetor?
Easy way to determine... identify which tube has the filter and connect only that tube to either carb port. Then press the purge bulb several times. If fuel spurts out the other carb port then its correct and simply attach the other tube.
If no fuel spurt, then likely you will see air bubbles in the tank. Switch the line (with filter) to other carb port and press purge several times. If no fuel spurts then some other problem.
Do not use the fuel return without the filter for this procedure as it risks plugging the carburetor with debris from the tank.
4/13/2021 5:32:17 PM •
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95 views • 0 helpful votes
Bc26 weedeater. What is the air gap for the coil?
I don't know the official air gap but it needs to be as close as possible without touching the flywheel - bear in mind the flywheel will expand as it gets hot. I find 8 thou (0.008") works well with small engines.
6/29/2020 5:39:14 AM •
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205 views • 1 helpful votes
Ryobi 40v trimmer. The string feeds longer and the motor starts to really labor to keep working, then motor starts burning once it gets into thicker weeds. What causes this and how can I fix it?
All the strimmers of my experience have a sharp blade set in the guard to cut the string when it exceeds a maximum length - maybe it is blunt or missing.
"Thicker weeds" could be too much for a cordless grass trimmer that can only be efficient when it is running at maximum speed. Thicker weeds are likely to slow down the motor and prevent it cutting efficiently, reduce the amount of cooling air through the motor while increasing the current being consumed by the motor; hence an overheating motor.
It is one of the physical laws that a horsepower can't be got out of a machine that doesn't have more than a horsepower going into it. With a cordless drill/driver there is a gearbox to provide a huge mechanical advantage - the motor turns fast and the chuck turns slowly, a grass trimmer can't have that advantage and with the power input being severely limited, the capability of the machine is similarly very limited.
My 22cc petrol strimmer struggles and slows down when it encounters thicker weeds and needs a deal of patience and consumes string at a much greater rate. In the early days of the strimmer engine sizes as small as 16cc were available but over the decades they have grown significantly because they weren't powerful enough to provide satisfactory performance. Today I don't think I could buy my 22cc strimmer again.
5/30/2020 3:30:07 PM •
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202 views • 1 helpful votes
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