俥俙俻

Here is Frequently Asked Questions.

Q1 Engine does not start.
A1 Check if the fuel reaches the carburetor.
A2 Does the main needle open adequately? 丂Standard position of the needle depends on model, refer to the instruction manual of your engine.
A3 Check if the throttle valve opens slightly from the idling position.
A4 Check if you close the slow needle excessively.  If so, return it to the original position and adjust it once again.  The set position depends on model, refer to the instruction manual of your engine.
A5

Check if plug filament is broken or deteriorating.

A6

Is the battery fully charged? 丂Connect the plugheat to a spare plug and check if it glows red.

A7

Check if the plug is difficult to glow red due to over choke.


Q2 Engine stops once removes plug heat during idling.   
A1

Idling will be unstable or engine will stop due to the rich fuel unless reaches its peak with main needle.

A2

Check if the fuel is rich due to slow needle is more open than usual.  Close the slow needle gradually until stabilize.

A3

Check if the plug filament turned white and deteriorated.

A4

Check if the plug is suitable with the engine.  Our plug is recommended.  If you choose the other maker乫s one, the plug for 4 stroke is recommended.


Q3

Engine stops when changing to medium speed and full throttle from idling.

A1

Check if you closed the slow needle excessively.  If so, return it to the original position shipped from factory and adjust it once again.  The set position depends on model, please refer to the instruction manual of your engine.

A2 Adjust slow needle until stabilize closing slow needle gradually if engine stops due to spark plug fouling caused from rich fuel opening slow needle excessively.
A3

Check if the main needle is closed excessively.  Check if engine speed is abnormal at idling, medium, and maximum lowing approx. 300-400rpm after reaching peak with main needle.


Q4

 Is it possible with main needle to left and right reversal ?

A1 It is no problem to shift the needle position to left side, the needle position of our single cylinder engine is right side view it from the back when the engine is shipped from our factory, though.  Regarding FA-45S, FA-50, FA-65, FA-72, FA-80, FA-91S, FA-100, there is a O-ring in the part attaching an intake pipe to cylinder head, make sure to prevent the o-ring from coming off from there when reversing the carburetor.  Regarding FA-120, FA-150, FA-180, reverse it removing 2 pcs. of cup screw for fixing carburetor.  A o-ring is attached in the carburetor, make sure to prevent the o-ring from coming off from carburetor during reversing. Regarding FA-450R3D, please to be sure not to reverse the needle position right/left. There is a possibility for the engine that it could have a bad effect on the performance of engine.

Copyright(C) 2004-2015 SAITO SEISAKUSHO CO., LTD. All Rights Reserved.

BACK