To Examine The Spark Plug; To Adjust The Engine; To Sharpen The Grass Knife And Grass Blade - Husqvarna 545RXT AutoTune Manual Del Usuario

• Use a socket wrench with a shaft that is sufficiently
long to let you keep your hand behind the cutting
attachment guard. The arrow in the illustration shows
the area where you can safely operate the socket
wrench.
• To attach, tighten the locknut in the opposite
direction to how the cutting attachment rotates.
• To remove the locknut, turn it in the same direction
as how the cutting attachment rotates.
• Keep count when you remove and attach the
locknut. Replace the locknut after approximately 10
times.
Note: Make sure that you can not turn the locknut by
hand. Replace the locknut if the nylon lining does not
have a resistance of a minimum of 1.5 Nm.

To examine the spark plug

CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
24
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 27 .
• Replace the spark plug if it is necessary.

To adjust the engine

Follow these instructions if the engine does not operate
correctly.
1. Attach an approved cutting attachment, see
Accessories on page 28 .
2. Start the engine.
3. Operate the product in usual conditions for 3
minutes.
4. Lift the cutting attachment in the air and apply full
throttle for 30 seconds. If a trimmer head is used,
make sure that the trimmer line is cut to correct
length by the guard knife.
Note: Do not cut grass or branches during this step.
5. Operate the product in usual conditions to make sure
that the engine operates correctly.
6. If the engine does not operate correctly, do step 4
and 5 again 3 times.
7. Let your Husqvarna dealer adjust/repair the product
if the engine does not operate correctly after you
have done all these steps.
To sharpen the grass knife and grass
blade
WARNING: Stop the engine. Use protective
gloves.
• To sharpen the grass knife or grass blade correctly,
refer to the instructions that come with the cutting
attachment.
• Sharpen all edges equally to keep the balance.
• Use a single-cut flat file.
Technical data
171 - 008 - 08.06.2020