OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Trimmers and Brushcutters McCulloch Trimmers & Brushcutters Mac 65 SL Carby Tuning!

Hi, can somebody please tell me the correct tuning for this motor, because it runs in full choke and revs high, after letting it warm up when i open the choke it slowly dies. thanks for your help

James kemp

James,
Follow these items in order and you should be ok.

Check cylinder through exhaust port to see if you have any scoring, if not follow these next steps.

1. Drain tank of fuel and replace fuel filter in tank.

2. Remove and replace carby diaphrams and fuel filter screen in carby.

3. Set the "L" (low) mixtute screw to one and a quaters off bottom.

4. Set the "H" (high) mixture screw to one turn off bottom.

5. Refuel machine with fresh two stroke petrol and start.

6. Then adjust the "L" screw until it does not hesitate.

7. Then adjust the "H" screw until the machine peeks and back off 1/4 turn.

Regards,
Bruce