1990 Mercury 115 winterizing questions

[harleynut]

It seems to be required to remove the bottom bracket circled in red in the photo in order to remove the airbox cover and gain direct access to the carbs for fogging. I was considering fogging through the intakes in the second photo but I wasn't sure if there was a filter in there and feel I won't get adequate coverage. Is this the only way or am I going about this wrong?

Also, when running the boat at idle speed hooked up to hose and a dual flow flusher it's very difficult to get the water to cycle through the motor. I've adjusted the water pressure thinking that might have something to do with it without much luck. It seems hit and miss if it's going to work for me. When I actually put the boat in the water and start the motor the water starts flowing nearly immediately. Any tips?

Thanks.

 

[Scott Danforth]

when on the muffs, full pressure on the largest hose you can get your hands on. no such thing as too much pressure or water flow in this situation.

you will have to pull the front airbox cover if you want to fog, the lower bracket should not need to come off.

 

[harleynut]

Thanks for the response. I would agree you shouldn't have to but I ended up having to loosen the bolts in the bracket enough to get at the screws at the bottom of the airbox. There's probably an easier way.

I'll try full power on the flush!

 

[harleynut]

I was able to successfully get the airbox removed by loosening the two bracket bolts as I mentioned above.
I was also able to get water flushing through the motor by increasing the RPMs and having the water faucet on full power.
Thanks for the help.