I just purchased an O-320-B1A that I am overhauling for my new RV-6 project. The engine was taken out of service in the early 80's and has been sitting indoors for a few decades. Very little corrosion and has all new top end components not yet installed.
This engine has the Marvel MA-4 carb (-12 version) that, according to the engine log, was rebuilt not long before taken out of service. It is tight with no slop and appears in great shape. My issue is how to clean it. If it were an auto carb, I would pull it apart and mechanically clean the small passages. However, rebuild kits are over $250.
I am concerned that there is varnish/deposits from the evaporated gas. Does any one have experience here. Do I have a chance to clean this properly with chemicals? I have considered pulling it apart to clean the jets and small passages and just purchase the gaskets that I need. I could then inspect everything else. My challenge here is that I do not have an overhaul manual or Parts catalog and can't seem to find one.
Does anyone know where I can find these documents?
Thanks for your assistance.
Larry
This engine has the Marvel MA-4 carb (-12 version) that, according to the engine log, was rebuilt not long before taken out of service. It is tight with no slop and appears in great shape. My issue is how to clean it. If it were an auto carb, I would pull it apart and mechanically clean the small passages. However, rebuild kits are over $250.
I am concerned that there is varnish/deposits from the evaporated gas. Does any one have experience here. Do I have a chance to clean this properly with chemicals? I have considered pulling it apart to clean the jets and small passages and just purchase the gaskets that I need. I could then inspect everything else. My challenge here is that I do not have an overhaul manual or Parts catalog and can't seem to find one.
Does anyone know where I can find these documents?
Thanks for your assistance.
Larry