my 02 gulfstream was sealand (dometic). seems to be current models that look the same.
https://www.dometic.com/en-us/us/products/hygiene-and-sanitation/sanitation/boat-toilets scroll down.
same. agree on the dridek. but all i use is this. https://www.westmarine.com/buy/west-marine--gel-coat-scratch-patch--P004_120_006_503?recordNum=5
good luck. ron
can't speak to the genset, but i haven't been on ANY boat that didn't have a significant reaction to a broadside wave. i almost tossed my father when i was a young teenager.
i don't know what "stiff" means to you. hydraulic should be smooth, but you are still turning the engines. if trim...
don't bother. i had 5212's. at some point in the past a software update caused the sonar voltage readout to go sideways. mine was about 1/2 volt or so low. ron
one other thing. if you leave the charger on constantly it could boil your battery if it is not operating properly. i myself only use the charger when i am on the boat, and my batteries are well maintained. ron
a few trouble shooting ideas.
1. id all circuits on the starboard battery.
2. ensure battery switches are all off
3. turn off main breaker on battery switch panel (and windlass if there is one)
4. make sure red button kill switch on thruster is off
at this point only constant feeds should be in...
from what i've read, boating and CO are a big issue. you can probably find articles in the Boat US mag. transom riding on big boats with seating areas is an issue they had focused on. we always make sure of good airflow when travelling at low speed.
you might want to pickup a good battery...
these are the props i ran. sorry i could not properly post the PB and the Yamaha site didn't have archives. the prop is in RED
i'm not a tech, but even i know there is something wrong with the numbers you posted.
new ones with f300's...
can't help with those, but i put XL4s on my 2009 with F350s. virtually no ventilation, increased bite, and stable mpg over a wide rpm range. i lost about 3-4 mpn on top end, but i don't do top end. good luck, ron
not for nuttin', but in the old days we cobbled together a 2x4 frame and pulled a cheap tarp over the boat to keep leaves and snow out. at some point, it became necessary to hermetically seal up your boat for the off season.