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Post  Clrcflr1 on Wed Jun 10, 2020 12:53 am

A friend have me this engine a while ago. I was checking it out and it seems the piston is seized in the cyl. Are these worth repairing? Are there Parts available? Where?
Thank you in advance
Tim
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McCoy 35 blue head Empty Re: McCoy 35 blue head

Post  Ken Cook on Wed Jun 10, 2020 4:44 am

Tim, is it seized from running friction or is it seized from just sitting? The Mccoy engine series the red head and the blue heads were a very inexpensive disposable engine line. The metallurgy was on the inexpensive side which led to many early failures. It was just as easy to purchase another and go play. There are no parts available for these engines. Finding a donor would be the most recommended advice. The blue heads were usually r/c and the red heads were control line, either or swaps out to each other. These engine used fiber gaskets at the base and cylinder head which are not reusable however they can be sourced. They also require a fuel with a oil content of at least 25% all castor.
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Post  Clrcflr1 on Wed Jun 10, 2020 9:41 pm

Thank you for your input! Piston and cylinder are soaking . We'll see. Thanks again
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Post  OhBee on Thu Jun 11, 2020 12:24 am

Ya...most of these old engines are stuck from old castor oil that has dried and hardened. Heat and solvents will free them up.
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