This is a question for Catalina 30 owners with Atomic 4's.
I have a 78 Catalina 30 that I pulled a bad 12 hp Yanmar diesel out of. (Yes it came with a YS12B from the factory) As a long time Atomic 4 fan I am in the process of rebuilding an A4 to install in place of the Yanmar. Although this is not an easy swap, the only challenge I have is with engine angle and oil pan to hull clearance. My initial measurements using my mock-up engine indicate that at the approximate 7 degree angle of the prop shaft, an A4 oil pan in this C30 will only clear the bottom of the hull about 1/4" or so at it's lowest point. I'll rebuild and put the Yanmar back in it and sell it if installing the A4 requires a new prop strut and shaft log at a steeper angle.
Before going further with engine stringer modifications and sinking more machine work and parts into my A4 motor, I need to know what angle the motor is sitting at in your C30's. I would also appreciate knowing how much clearance you have under your oil pan in the area of the rear motor mounts. Any information you can provide to that end is much appreciated.
Mark
I have a 78 Catalina 30 that I pulled a bad 12 hp Yanmar diesel out of. (Yes it came with a YS12B from the factory) As a long time Atomic 4 fan I am in the process of rebuilding an A4 to install in place of the Yanmar. Although this is not an easy swap, the only challenge I have is with engine angle and oil pan to hull clearance. My initial measurements using my mock-up engine indicate that at the approximate 7 degree angle of the prop shaft, an A4 oil pan in this C30 will only clear the bottom of the hull about 1/4" or so at it's lowest point. I'll rebuild and put the Yanmar back in it and sell it if installing the A4 requires a new prop strut and shaft log at a steeper angle.
Before going further with engine stringer modifications and sinking more machine work and parts into my A4 motor, I need to know what angle the motor is sitting at in your C30's. I would also appreciate knowing how much clearance you have under your oil pan in the area of the rear motor mounts. Any information you can provide to that end is much appreciated.
Mark
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