Forest Master Models: FM9DD/FM14DD/FM18DD20
Troubleshooting
Symptom Possible Cause
Engine smokes. • Check the oil level and adjust as needed.
• Check the air filter and clean or replace if needed.
• You may be using the wrong oil – too light for the temperature. Refer to
your engine owner’s manual for detailed information.
• Clean the cooling fins if they are dirty.
Insufficient drawing
through of branches or bad
chipping performance.
• Wood is too hard. Is the wood seasoned. Chipping is more efficient with
green freshly cut wood less than 3 days old. Seasoned wood does not draw
as efficiently.
• Are the knives blunt or worn? Sharpen or replace if needed
• Are the branches too thick? Maximum diameter is 50mm
• Is there too much or too little space between the knives and the base plate?
Adjust the bolts on the knives to fit and manual rotate the drum to check if
it turns smoothly.
Chipper is producing saw-
dust
• trying to chip hard wood. Wood should be chipped fresh, ideally within the
first three days of cutting
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