Fuel Tank - Husqvarna 545 Mark II Workshop Manual

8.14.8 To adjust the metering lever
The distance between the metering lever and the gasket
surface of the carburetor housing must be 0.55 mm.
Adjust the distance if it is more or less than 0.55 mm.
• Move the end of the metering lever down (A) to
decrease the distance. Move the end of the metering
lever up (B) to increase the distance.
A
8.14.9 To do a pressure test of the carburetor -
option 1
Always do a pressure test after you repair the
carburetor.
1. Make sure the carburetor is fully assembled.
2. Connect a pressure tester to the carburetor fuel
inlet.
3. Put the carburetor into water.
4. Increase the pressure to 0.2 bar.
5. No leakage is permitted. If a leakage occurs, refer to
Troubleshooting leakage on page 47 .
8.14.10 Troubleshooting leakage
Fault
Leakage in the diffuser jets
Leakage in the impulse pipe
Leakage in the ventilation hole on the
metering unit
722 - 003 - 26.03.2019
8.14.11 To do a pressure test of the carburetor -
option 2
1. Block the fuel inlet.
2. Make a 0.2 bar negative pressure to the purge
3. If there is a leak, use leakage spray and identify
8.14.12 Adjustment of the AutoTune unit
Note: The product adjusts automatically and will be fully
adjusted after some minutes of normal operation.
The high speed part is adjusted during loaded operation,
B
such as cutting and felling.
The idle part is adjusted when you operate the product
at idle speed.

8.15 Fuel tank

8.15.1 To disassemble the fuel tank on model 545
Mark II and 550 XP
1. Drain the fuel from the tank.
2. Remove the chain brake system. Refer to
3. Remove the guide bar and saw chain.
4. Remove the cylinder cover.
5. Remove the spark plug cap and the spark plug.
6. Remove the air filter.
7. Remove the air filter holder and carburetor. Refer to
8. Remove the chain catcher to get access to the
Cause
The needle
valve
The pump gas-
ket
The control
gasket
nipple on the carburetor. No leakage is permitted.
where the spray is absorbed. Use leakage spray to
show leakages in primary jets, idling needles,
measuring cover gaskets and measuring
diaphragms, and AutoTune
®
Mark II
disassemble the chain brake on page 18 .
To disassemble the carburetor on page 46 .
screw of the vibration damping system. Loosen the
screw.
™
gaskets.
To
Repair instructions - 47