What would cause 'dimpling' on the engine block face?

[thatch]

RMark, After reading your numbers in post #22 I had to say "no way", until I re-read it and realized that you have a "reduction gear" A4 instead of the normal "non reduction" type that is standard on every C-30 that I have ever seen. The standard factory prop, on DD A4's was a 12x7-2 blade, which is considered by many to be a little too much for many of our "aging" A4's. I personally reduced the diameter of mine by 1" which raised my cruising rpm into a more comfortable range. Raising the hot section of your exhaust was certainly a good insurance policy although I have never had a water intrusion problem with my stock setup. Finally, nice work on altering your cabinetry to allow for better engine access, always a good idea whenever possible.
Tom

[hanleyclifford]

Originally Posted by thatch

RMark, After reading your numbers in post #22 I had to say "no way", until I re-read it and realized that you have a "reduction gear" A4 instead of the normal "non reduction" type that is standard on every C-30 that I have ever seen. The standard factory prop, on DD A4's was a 12x7-2 blade, which is considered by many to be a little too much for many of our "aging" A4's. I personally reduced the diameter of mine by 1" which raised my cruising rpm into a more comfortable range. Raising the hot section of your exhaust was certainly a good insurance policy although I have never had a water intrusion problem with my stock setup. Finally, nice work on altering your cabinetry to allow for better engine access, always a good idea whenever possible.
Tom

The "flaw" or "inconvenience" re-engineered out of the product.

[thatch]

Hanley, Perhaps it's time to "pole" the Catalina-30 crowd. Since virtually all of these A4 powered boats would have come from the factory with the same type of hot section, I would think that they would have adopted RMark's cure rather than just living with this "flaw". My "innitial" starting protocol is to start the engine at the engine, via parallel engine controls, and then to open the raw water intake. My FWC engine is equipped with an electric collant circulation pump, which is also checked for flow at startup.
Tom

[ndutton]

RMark,
How about some pictures of your reduction gear installation and galley mods? I'd especially like to see the clearance between the output coupling and the stuffing box as well as any mods in the area of the cabin sole in the galley.

[hanleyclifford]

Originally Posted by ndutton

RMark,
How about some pictures of your reduction gear installation and galley mods? I'd especially like to see the clearance between the output coupling and the stuffing box as well as any mods in the area of the cabin sole in the galley.

+1 - This is how we keep learning.

[RMark]

yeh, installing the A4 with reduction was a little tight, but seems to be working out well, About 1/4" in front and 1/2" between stuffing box and flange. I posted some in Mark Millbauer's thread "Catalina 30 engine configuration", don't know how to create link. Really lucked out and found used stainless steel shaft exactly the right length for 40 bucks! don't know what it was from. Built cabinets out of white formica and reused teak trim, a very clean modern look. If I get down to boat this weekend will take some pics. I am in Calif. Yacht Marina in Willmington, Super friendly, Customer oriented marina, the owners are always doing customer appreciation events and it is also home to San Pedro Yacht Club, a great bunch with first class meals on weekends.

[ndutton]

[off topic]

Originally Posted by RMark

I am in Calif. Yacht Marina in Willmington, Super friendly, Customer oriented marina, the owners are always doing customer appreciation events and it is also home to San Pedro Yacht Club, a great bunch with first class meals on weekends.

Dude, we're cousins! I'm in Cabrillo. Same marina ownership, same great management model, many events as well. I and my crew enjoyed a very nice lunch in your marina last year the same day as the U.S.S. Iowa was moved to her permanent berth. We made a day of it.

[RMark]

I was out there that day, it was spectacular, we had a marina sponsored lunch at your marina during summer, don't remember date. The brothers that own our five sister marinas are first class. My brother has a Seawind 1160 in our marina with orange canvas, goes out every weekend, The "Bama Breeze" you've probably seen it.

[sastanley]

Here's a link to the thread to which RMark refers:

We definitely need more & detailed pics...& put some shoes on!!

www.moyermarine.com/forums/showthread.php?t=7019