My 6Cs took five gallons each?? Are yours different?Just 5 years ago I was able to change 8D batteries on my own... not anymore. Now I also have the Cat dealer do the oil changes...sure they re big engines that take 20 gallons and two BIG oil filters but I used to do them on my own.
Last boat & current boat take 20Gals with Gen-My 6Cs took five gallons each?? Are yours different?
I had an oil change pump built in and ran the old oil into one gallon buckets I saved from last time. one gallon buckets were easier for me to handle. Got a few extra years out of the old body that way. Added a valve with a tapered hose fitting to suck out transmission oil.
I always installed the filters empty and emptied the old ones before removing them. Spinning the starter with thefuel off got the pressure up before starting.
8 Ds are the job for young guys.