Hi Richard. What I’d do: If the engine runs, start by doing one Sea Foam Spray treatment (full can) into the carburetor throat. Every treatment will progressively clean and lubricate around the backs of the valves, so do as many treatments as often as you wish. Adding half a can of Sea Foam High Mileage to the oil crankcase will also help clean on the oil side of the valve mechanisms.
Here are two more resources to check out for more info.
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Hi Richard. What I’d do: If the engine runs, start by doing one Sea Foam Spray treatment (full can) into the carburetor throat. Every treatment will progressively clean and lubricate around the backs of the valves, so do as many treatments as often as you wish. Adding half a can of Sea Foam High Mileage to the oil crankcase will also help clean on the oil side of the valve mechanisms.
Here are two more resources to check out for more info.
How to use Sea Foam Spray in a carbureted engine video: https://www.youtube.com/watch?v=O1KM_J6zDYs
Step-by-step written instructions for Sea Foam Spray: https://seafoamworks.com/uploads/public/resource-library/2022/07/HOW2_Sea-Foam-Spray-Auto-Gas-Carburetor.pdf