Choke plate doesn't move

slomo

Lawn Addict
Joined
Jul 14, 2019
Threads
76
Messages
4,709
Intake top 004
Exhaust bottom 006
Explain exactly the stroke you checked the valves on. There are 2 TDC positions on a 4 smoke engine. Should be 1/4" PAST TDC on COMPRESSION stroke.
 

slomo

Lawn Addict
Joined
Jul 14, 2019
Threads
76
Messages
4,709
Soaked Briggs carb in cleaner overnight, used wire and air to blow out
Might need to boil the carb per Bertsmobile1's suggestion. Could take a few times to get it clean.

From Bertsmobile1 below. Great advice.

"Before I got the ultrasonic cleaner we used to boil carbs using a big pot & a dishwasher tablet
The ones with the ball in the middle seem to work better
A nice rolling boil works best
Give it an hour or so then boil some more water and take it out of the boiling soapy water then strait into the boiling rinse water
Give it a 5 minute rinse hen take out & blow dry.
Do not allow the carb to sit in the wash water unless it is boiling or it will oxadise.
Some like to do a pre-rinse in boiling water with some vinegar in it to neutralise the alkaline soap first."
 
Last edited:

ba_50

Well-Known Member
Joined
Jul 9, 2014
Threads
33
Messages
132
Turned out 1/4" past dead center and set gaps.
Tried a different plug this morning and nothing.
Checked plug for fuel and it was dry.

I will send the choke shaft this time.
 

StarTech

Lawn Royalty
Top Poster Of Month
Joined
Feb 19, 2020
Threads
79
Messages
10,271
Intake top 004
Exhaust bottom 006
Soaked Briggs carb in cleaner overnight, used wire and air to blow out
Choke plate isn't sticking
Greased bottom of shaft before you posted about it.
Gas tank is clean, fuel flow ok
Linkages same as when it was running.
Fires but won't run now.
Wrong. This engine uses a cross flow head design. The exhaust valve is closest the flywheel and the intake is closer to the PTO end.

Also it still sound like you have carburetor problems. When cleaned the carburetor and removed the fuel transfer tube you may have lose the main jet. THey are only held in by oring which does strink and gets loose. Can be easily blown by compressed air. Once blown out they are nearly impossible to find.

But with the plug dry you may have a fuel solenoid not working too.
 

ba_50

Well-Known Member
Joined
Jul 9, 2014
Threads
33
Messages
132
Boiled in soapy water for 1 hr, fresh water 2x. No fuel.
The fuel solenoid tests ok.
 

ba_50

Well-Known Member
Joined
Jul 9, 2014
Threads
33
Messages
132
The jet is ok.

Still no fuel.
Put a new Chinese carb on, same thing.
I changed the valve settings and torqued them at 40#
 

ba_50

Well-Known Member
Joined
Jul 9, 2014
Threads
33
Messages
132
Update
After several attempted starts is getting some but not enough to keep running.
 

slomo

Lawn Addict
Joined
Jul 14, 2019
Threads
76
Messages
4,709
I changed the valve settings and torqued them at 40#
What is this exactly? 40ft lbs or inch pounds?

Take pictures of what you are doing. Videos are even better. Post to youtube and link the videos here.

slomo
 

slomo

Lawn Addict
Joined
Jul 14, 2019
Threads
76
Messages
4,709
You need air, fuel, spark and compression. Start from these basics.

Dry plug is no fuel getting to the plug.

Gas cap vent bad?

Is the choke working or not?

slomo
 

ba_50

Well-Known Member
Joined
Jul 9, 2014
Threads
33
Messages
132
I have tried 3 carbs after soaking in cleaner. The motor will run if spraying carb cleaner at the air intake. My cleaner is old and may not be effective.
 
Top