new rebuilt flathead is tight

[allford]

Well I rebuilt my flathead myself, it's ready to start I have it mounted on a steel 4 wheel cart. I can roll it outside to make trial starts without burning down the shed. My problem is the motor is tight. Anybody ever had this issue? Do you think I could remove some spark plugs and make it run. That would make less compresson for the starter. I know the firing order is 1-5-4-8-6-3-7-2, Anybody know what plugs would be best to remove and allow motor to run? I have 15 lbs. oil pressure running on the starter with all plugs removed. The motor cough a few times and tried to start but I'm fraid of doing damage to the starter. Wish I could pull start but my running gears need a lot of work before I'm ready to mount the motor. would starter spray maybe help? I think mybe if It started and ran a little it would get free. Any help and suggestions would sure be great.

I must attend a Church fish fry dinner this evening but will be back at again late tonight and eary Saturday morning. the motor is a 39 Merc. that has been setting for 30 years. It is a lot of fun working on the old engine and I want to hear it run.

Thanks in advance

Alan in Owensboro Kentucky