Re: Fogging Spray
The 100 hour maintenance schedule is derived from the "average" 100 hour boating season. In reality, it should be "annual" maintenance schedule but assigning it an hour figure gets a lot more attention than saying once a year.Think about it...what is so magic about 100 hours?
I can put 100 hours a week on my boat during prime fishing season. Does that mean I change my lower unit oil and spark plugs every weekend and my fuel filter twice a week? Of course not, that would be silly. I check my LU fluids once a month or so for water intrusion. No water contamination = no oil change. My usually change the LU oil as part of my "winter tune-up" the end of October. I say "usually" because the oil in my LU at the moment is going on it's 3rd season.
At $30 a piece, I don't change fuel filters on a schedule. I have a vacuum gauge on my fuel filter that gives me the condition of the fuel filter at a glance. I have gone upwards of 350 hrs. between filter changes. Had I followed the 50 hrs. standard, I would have needlessly gone thru $180 in filers.
I agree with everything you said. In fact, your philosophy is much the same as mine. In reality though, most owner's manuals have a caveat that says "or, annually", meaning at Fall winterizing. So, the 100 hour thing is a moot point.
Nevertheless, I'm lost here. What does any of this have to do with the OP's Q re. fogging?
OB companies have recommended it for eons. When OMC specified 100:1 oil they backed off for one reason - they had warranty claims for Winter rust. It was mentioned above that a 50:1 oil ratio probably doesn't need fogging. Maybe not! The manual for my Rude Model A (dated 1927 - for a motor that ran 15:1 oil) also recommended fogging.
