mrsrobinson
Well-Known Member
New thread to continue the conversation currently on the 3126/3116 thread.
- Boat ran strong, 180 degrees both engine first 12 hours post purchase
- Sucked up mud entering new creek/marina, both engines overheated, alarm came on
- Sea strainers were packed with mud, cleaned them and back flushed seacocks, ran engines at the slip, 160 - 170 degrees
- As part of service I was planning to do anyway: replaced all fuel filters, belts, starboard engine fuel primer pump and did the valve lash adjustment. Did not have the tool to set the injector height so that is on the to do list. Took boat out same day for test run. Engines ran at 180 degrees until on plane at 2000 +- RPMs, temps immediately spiked to 200+
- Replaced raw water impellers. No broken fins found. Removed end caps on heat exchangers. Looked mostly clean/good to me.
- I pulled the inside one off of both engines. I found very very small pieces of an old impeller in one, the port side. This could not be from the impeller I replaced in my opinion since none of the fins were damaged. I removed these pieces and then flushed with dock water, nothing came out/back. I unsuccessfully tried to remove the other end caps so water could move all the way thru. I could not figure out how to get to the last of the 5 bolts with the wrenches/sockets I had. That was next on my list as well.
I purchased the .22 caliber cleaning rods to do this though I did not since I thought pushing the rod into a hole with other cap on would do more harm than good. Took the boat back out, same result.
- Mechanic started to flush the raw water side of port engine with barnacle buster, marina asked him to leave. Started engine 3 hours later to remove the barnacle buster.
- Removed, cleaned and reinstalled trans coolers on both engines. Replaced zincs. Looked mostly clean/good to me. Took the boat back out, same result.
- Flushed port engine aftercooler with barnacle buster (see video above) since this is the one the mechanic started with. Nothing looked bad to me in the flush. Too much grassy crap in the water so I did not start the engine to go out for a test.
- Ordered new raw water pump backing plates and various hoses from Carter Machinery this weekend. I recall seeing some minor grooves on the back of the plates when I changed the impellers, I do not what's acceptable, what's not, so I figured go ahead and replace them.
- My next step is to barnacle buster the port heat exchanger.
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