Last week I worked on a few different projects. First off, I finished the final details of the engine pull I completed the week before last consisting of removing hydraulic and wash down pumps, draining of the hydraulic system, removal of main shaft, main shaft packing box and cutlass bearing, and rudder cutlas bearing and hanging hoses for ease cleaning and gel-coating I couldn't remove the main shaft coupling due to corrosion so I ended up cutting it off. Another project I started at the end of the week was diagnosing a coolant circulatory issue on the engine pictured below. The starboard exhaust manifold was overheating due to a lack of coolant flow on that side. After disassembly, we concluded the circ. pump wasn't getting completely bled of air. The solution I came up with was to drill and tap the top of the circ. pump for a 1/8" peacock. I tested it today and the problem was fixed. One thing I learned last week was these Chris Craft engines are installed "backwards" in comparison to most marine applications. By "backwards" I mean the flywheel is facing the bow end of the boat and the number one cylinder is facing aft. Therefore the marine gear (transmission) is attached on the "front" (number one cylinder end) of the engine not behind the flywheel. Weird..... I logged a total of 38.73 hours last week.
Engine with circulatory problem.
Picture of circ. pump before tapping.
Circ. pump tapped with 1/8" pipe threads.
As stated above, I ended up using a peacock for ease of bleeding rather then a 1/8" plug as shown in the picture.
Corroded shaft coupling with the shaft partially cut.
Interesting report Miles. Sounds like good stuff.
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