Cockshut 30 motor only turns over a quarter turn.

(quoted from post at 06:01:14 04/28/22) Cockshut 30.1948. Motor only turns over about a quarter revolution. Been sitting 15 years. Ideas?

One pot is likely filled with something. Have you removed the plugs? If water, that would gush out. If mud dobbers, likey visible. Try an endoscope?

Question might be:was it like this when stood down?

This post was edited by oliver90owner on 04/28/2022 at 12:10 am.
 
pull the valve cover and check the valves for being stuck. if you are turning against a stuck valve the push rod will bend also. did you lube
the cyls before trying to turn it? there can be some rust in them also. are you turning it by hand or with starter?
 
(quoted from post at 07:50:16 04/28/22) pull the valve cover and check the valves for being stuck. if you are turning against a stuck valve the push rod will bend also. did you lube
the cyls before trying to turn it? there can be some rust in them also. are you turning it by hand or with starter?


Turning by hanh
 

Then yes, just pull the valve cover and plugs. Lube the cylinders. See what's moving (or not) in the valve train. Go from there.
 
remove spark plugs and blow in the cyl's with a long nozzle air hose . make sure its at TDC on compression if possible, so the junk fly's
out.
 

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