Since there isn't a tech page on the new site, I'll post it here. I found that both injection pumps on my 6bta-330M3 engines leaked a little bit of oil from the small freeze plugs  so I decided to have them rebuilt as a winter project.

I used Advanced Marine Diesel for the job. It took a few weeks to have an injection shop to do the job. The pumps were reinstalled in early December. Then came the rain, Then, I found I had a 6 x 6 blue tarp wrapped around my prop. Then, I found the shifter mechanism on the starboard Zf220A transmission was locked up and need it's own maintenance.

I lost several weeks with these unexpected problems but everything is back together now. Bob and I took it out for a test run on the 13th. The engines sound much quieted and are smoother at all rpms. Fully loaded the engines made 2920 rpm and 30.6 kts. 20 psi of boost. Now, I can hope for better fuel economy.

If you have ZF200A transmissions, the shift mechanism is a maintenance item. If shifting isn't smooth, you might need to take it apart and grease the parts. I used water proof trailer bearing grease. Removing the drift pins and the circlip for is a challenge. You'll need a good set of tools to do the job