1975 chrysler 4.9 wont start

Bulvekasis69

Recruit
Joined
Jun 15, 2023
Messages
3
Hello, it has spark, it has fuel but wont start..
When i bought it doesnt have spark, but i cleaned the points and spark fixed. But wont start, i tried to spray with starting fluid in to the carb and spark plug holes but wont start :/
 

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racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
37,832
Tried switching plug wires?----Where is the flywheel key ?---Does spark jump a gap of 1/4" or more on a test device ?
 

Bulvekasis69

Recruit
Joined
Jun 15, 2023
Messages
3
Tried switching plug wires?----Where is the flywheel key ?---Does spark jump a gap of 1/4" or more on a test device ?
Yep i tried to switch.. Flywheel key? Never heard about that. With spark i dont know i dont have special tool like "test device" . Tomorrow i will try to set points gap to 0.30-0.40 mm because now its from the eye. Btw sorry for my broken english friend :/ and thank you verry much for trying to help me :)
 

Nordin

Commander
Joined
Jun 12, 2010
Messages
2,555
If the flywheel key is shared the time when the spark appears will be wrong.
It would not fire even if it has good spark.
Set the points to 020 in (0,50 mm) that is the right gap.
You can check for good spark and that it can jump 1/4 in, 5/16 or 3/8 are even better (6-9 mm) by putting a wire in the spark plug boot and hold the end of the wire in different distances from ground.
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
This or one the right size goes in the groove on the top of the crank shaft.
Then the flywheel fits over the key with the slot cut in the taper.
This is the part# but it might be hard finding.
MAGNETO KEY
F12150
You can make a key fit if all else fails. it needs to be a tight fit or it can shear/break.
1686912350543.png
 
Last edited:

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
Clean the carb? Unscrew the tiny screw on the top of the gas cap?
Turn the gas on? When it's on remove the hose and see if it flows to the carb. Try removing the float bowl on the carb.
Spray WD-40 or any penetrating oil on the base making sure the spray gets on the top of the bowl and the gasket gets sprayed.. Then try taking it off after it's had a chance to soak the cork in the gasket.
Just removing the bowl: the gasket would probably break and fining a new one might be tough?? I just looked up the parts for your carb, nothing is in stock at most of the dealers but Ebay has one.290634050411
 
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