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Discussion Starter · #1 ·
This is our first season with our new-to-us 1979 Catalina 30.
The old Atomic 4 was running great – until this weekend! It started right up and went into forward gear ok, but when I want to accelerate out of the slip, the engine would bog down as if under a load. It would only rev to about 1,000 RPM while laboring heavily. The boat was moving slowly, but the engine just would not rev up to speed. It sounded like an old, overloaded dump truck laboring up a steep hill.

So I tried reverse, and it ran just fine! It would rev up and power the boat like it always did!

I’m pretty knowledgeable with gasoline engines, so I went through the fuel, spark, air thing and saw nothing obvious. I’m not very knowledgeable about boat drivelines. Could this be a problem with the transmission? Shaft bearings? Prop? I saw that the shaft was turning, and I didn’t notice any excessive heat anywhere.

Any and all help is greatly appreciated!
 

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Discussion Starter · #11 ·
Thanks to all

I appreciate all of your input. I have learned much about the nuances of the A-4 powertrain. Feedback from the Catalina 30 forum and Moyer Marine also cite fouled prop or fuel starvation as primary culprits. The first thing that I am checking is the prop. Prior to this use, the boat had not moved from her slip in the Chesapeake in almost 4 weeks. Come to think of it, the bottom was a lot greener looking that it had been! :eek: We will be on the boat again this weekend. Will let you know what we find. - r

Dog, TY, Point taken and understood. I have read here and elsewhere of marina electrical issues. As a relative novice, I'm really surprized that this piece of info isn't more widely published in boating safety kinds of literature. go figure...
 

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Discussion Starter · #15 ·
And the winner is… Fouled prop! And bottom, big time!

We had the boat pulled on Thursday morning and found at least an inch of barnacles and other Chesapeake Bay marine habitat growing on the bottom. The bottom was clean in March when she was splashed. The yard guys were amazed that the boat had only been in the water that long and had so much stuff growing on her.

Supposedly, the PO had the bottom done last season. Either there is a huge difference in anti-fouling requirements in the Chesapeake than there is in North Carolina where I bought the boat, or the PO used the equivalent of swimming pool paint instead of anti-fouling!

Anyway, we cleaned up the bottom, put her back in the water, and she runs great! Thanks again to all for your input.

Ray'n'Cyn
Lady Kel-e, C-30 #1455
 
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