4 HP briggs and stratton

[Affair_driven]

what is the best way to test if the spark plug isn't malfunctioned?

If condition of plug is unknown, it's just best to replace it. They're cheap enough. Avoid resistor plugs.

 

[tenlizard]

The spark plugs are fine...i tested them...I just think that the spark is weak with the engine...how do i clean the points?

 

[tenlizard]

actually, i'm just going to go to an electronic armature and upgrade it from those old things

 

[Affair_driven]

.i tested them

How did you test them?

 

[tenlizard]

i used it on another L head briggs that works all the time

 

[tenlizard]

i am using the recommended plugs:cj8

 

[tenlizard]

so do you guys think i should just get the new ignition magneto?

 

[Affair_driven]

Try cleaning points before making the jump to an 'electronic armature'.
I, among others, prefer point systems. Personal preference.
Sometimes a plug that appears to be good in one engine may not work in another. Certain plugs can behave very differently in different engines. Spark can blow out in one and not the others.
I had this happen recently when I installed a new plug in an old cast iron Briggs. Engine would not fire at all. I put this plug into a newer mower and it cranked up without a miss.
I then put a different plug into the old engine and have had no problems since.
It is likely the old engine could not handle the resistor plug.

 

[tenlizard]

how do i know if it is a resistor or non resistor plug...and yes...i used a brand new cj8 and it didn't work on the old engine...

 

[tenlizard]

oh i just looked up the specs on a cj8 and the only ones they make are non resistor so that takes away the spark plug problem