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BTW- the forward gear clutch dog projections are slightly curved. When in forward, and the prop is turned faster then the engine revs, you will hear a rachet sound. This is normal. Reverse gear locks the dog into the reverse gear. There should not be any racheting.

You should always shift "positively" into gear. "Babying" the shift causes damage. MerCruisers share clutch dogs with Mercury OBs. As such they have a number of projections on the forward part of the clutch dog, and matching ones on the forward gear. This helps slightly worn clutch dogs to...

We smelled the smoke here in central NJ. The smoke-fog was noticeable as well.

And what engine would you have?

One more thing. You will want to cover the deck in resin and cloth. 2 layers of light cloth or one layer of heavy cloth will usually work, although more can be better.

Gee, if you get an aftermarket voltage rectifier, it needs to be sealed against sparks. Sparks under the OB cowling are quite dangerous.

Minor imperfections can be addressed with polyester or epoxy putty.

Lay strips of resin saturated cloth on top of the stringers and frames. Now using ss wood screws, screw thru the deck into the stringers and frames. That is the best and strongest way to attach the decking, IMO.

Gee, purple stuff for the dirt, bleach for the mildew. They have anti-mildew stuff, as well as purple stuff for the pressure washer, if you like.

Gee, the data shows some misfires. Is that normal?

Gee, that is an unusual place for rust to form. It is usually pretty waterproof under the plug boot. Perhaps water was spraying from under the water jacket cover onto the spark plug? I would expect the shell to also be rusty if that happened.

Was the rust on the shell part of the spark plug?

Gee, a fluke anchor will do the same but needs more scope. I have a 2.5 pound fluke anchor that holds my 16 footer real well. Not sure it gets better than that.

Why are they better than fluke anchors?

Link and synch is where the mechanic sets the idle timing and synchs it to the carb opening. He then sets the max spark advance, throttle stop and throttle cable position. Every Merc service manual for your motor has the procedure. It sounds like you need a Merc Service Manual.

Gee, why not use polyester resin?

Gee, can you put the straight edge on the spindle? I would expect it to be bent down, no? I suppose it could be a loose bearing and/or low tire pressure and a lot of left turns. It is probably easier to replace the axle.

Have you checked the exhaust manifolds for water leaks into the exhaust passages? Also check the manifold to riser joint for leaks past the gasket.

Check spark immediately after it dies.

That looks to be the water cooled voltage regulator. I bought one from CDI or Sierra, and it rusted out in a couple of years use in salt water. Unless the OEM version is prohibitively expensive, I would recommend OEM.