On the failure of the thrust bearing on Anna Leigh's motor, let's address that. Here's what I found.
First, as we all know, the Honda 150 is an Accord auto 2.5 l, 4 cyl. engine turned on end. So there's vertical thrust along the crankshaft's axis that isn't there in an automotive application. The Honda's designers installed a thrust bearing at the bottom of the crank. Version 1.0 wasn't strong enough and there were failures. Honda has redesigned that item in later models, Version 2.0. Journey On (and I) have one of the earlier. The Honda V-6, another Accord engine, has the same problem to a higher degree. Google Cruisers Forum or The Hull Truth for the V-6 details.
When at Two Harbours, Catalina Isle, I checked with the outboard shop there. Yes, they have one and they're a Honda dealer. They service all the Honda 150's used by the Harbour Patrol, which run 24/7, going from idle to full bore. His comment was that while he's never had one go, he understands that has happened. He had 2 suggestions. First was to change the oil and filter regularly. Second was to buy a newer model. I'm following, and have followed, the first suggestion. Small engines need clean oil because they're stressed more. Clean oil helps them survive. Learned that a long time ago, the hard way.
Since both the Avalon and Two Harbours harbor patrol have had good service from Honda 150's my suggestion is to maintain those engines and quit worrying.
Another comment on the Honda 150 is corrosion of the thermostat housing. Apparently it happens if you don't flush the motor regularly after salt water use. Honda recommends leaving the engine in an upright condition (trimmed down all the way,) immediately after pulling the boat so the thermostat housing can drain. The thermostat housing has been redesigned and a C-Brat has installed the new housing, but had to buy a new cam cover.
My 150 corroded and I rebuilt the corroded area with JB Weld, an aluminum filled epoxy. Has lasted for the last 7 years.
All of the Japanese 4-strokes have some design flaw that needs to be watched. These are the Honda's. And obviously, the newest engine's have been upgraded.
And, yes, C-Dory 25's are sensitive to weight. I thought that Judy was the world's best packer, but I now defer to Avidmagnum12. I'd love to see a picture of the waterline on that boat, loaded.
Boris