I don’t know enough about Smartplug to help you. I can tell you that if something on my boat lasts 20 years, I’m buying it again when it needs replacing. “Better is the evil of Good Enough”.
What you can see looks good. Most vulnerable part is hidden by the o-ring and the core, which is the mating edge of the aluminum housing. If you pull the o rings off and slide out the core, you can check out the inner face and edge of the two ends of the housing.
We’ve switched from winters in FL to summers going north, since we now raise an 8 year old. This June we are going from our home port of Beaufort, SC to Annapolis for a month. I’ve only done the North Carolina leg of the ICW once and it was on plane knocking off 150 miles a day. This time...
Well, you could do the easy access one. If it pulls apart easy and there is no significant pitting on the aluminum housing, then good to go. So use it to learn the process and get an idea as to whether you need to pull the starboard one.
In 2017, We were just south of the path of totality here in Beaufort, SC. So we made a boating event out of it. Three of us took our boats up to Isle of Palms and anchored for a few days at Shark Hole. Had a lot of fun. Actual eclipse part was quick and underwhelming, but now we have it...
There is no 1000 hour service. Here is the general routine (at least what I follow):
Annually change oil/filter, fuel filters, transmission oil, clean air filters, test coolant and change filter based on test results, check impeller wear.
Every two years, fully service seawater cooling...
My pump on a 2001 was the 800 when I bought it. I replaced it once with the same. Although the parts manual says a 2000, there isn’t a 2000 in the four 400DBs I work on. But they are all 2001 or 2002.
Are you still dumping your galley sink into the shower sump?