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Engine on my Murray rider is 15.5 HP Briggs, vertical shaft. The automatic compression release on cam shaft was broken. I removed the engine, cleaned everything up, replaced the cam shaft, installed new gaskets and re-installed the engine. Oil is leaking (considerably) from some where underneath the oil sump. I have not, yet, removed the engine again. The oil is not leaking at the gasket between the sump and block. Could the leak be from around the sump bolts to block. Bolts were torqued according to specifications in my Briggs repair manual BUT I did not use any type of sealant abound the bolts. My Briggs repair manual did not call for use of sealer on any bolt. I also did not replace the oil seal of the sump at the PTO shaft.
Any help will be appreciated.

Thanks, and we are finally getting lots of rain here in Stephenville Texas,

Red Cox

You might need a seal on the pulley side of the engine

Replace oil seal, let us know how it goes.

murray2001 said:

You might need a seal on the pulley side of the engine

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Good post young man, I see an engineer in the making & future.

Thanks man

mechanic mark said:

Replace oil seal, let us know how it goes.

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Mechanic Mark; I am sorry that I did not answer you on this. I did replace the PTO shaft oil seal and it did solve the proble.

Have a great day and thanks
Red Cox

murray2001 said:

You might need a seal on the pulley side of the engine

Click to expand...

Murray2001; I am sorry I have not replied to you. Forgive me? I did replace the PTO shaft oil seal and solved the problem.
Thanks again,

Red Cox