I have a 1980s-ish Mariner 9.9M outboard, serial number 682-339381, that was dropped off for free (attached to a boat). It runs, but it didn't appear to pump water, as the guy who dropped it off said.
It hadn't been ran in at least two years, either, but after tearing the water pump apart and taking a quick look at it, it didn't look too bad. Of course, I ordered a new water pump kit anyway, but everything was in one piece.
There wasn't a drop of water coming out of the tell tale hole when it ran in a bucket of water, so I checked the hose that comes out of the powerhead and through the lower cowling. When I put some water into the intake from a garden hose, water came out of that hose just fine, so I checked the flange that it was connected to on the lower cowling. Sure enough, absolutely nothing was going through it, so I took the powerhead off to check that. It was clearly full of salt, so I soaked it in CLR and a concoction of chemicals to try and clear the blockage, to no avail.
The only progress I've made is a second hole that I accidentally poked through the driveshaft housing with a screwdriver while I was attempting to scrape some of the salt out, right beside the blockage. However, there's a tube going from the tell tale hole upwards that is totally clear. What the heck is the purpose of all these holes???
This is the first outboard I've ever really worked on, so is there something I'm getting wrong here? Is water even supposed to get through that tiny passage, or is it just there to block the other end of the water hose off??? I've ordered all the gaskets that I need to put this thing back together, so I'd like to know what I need to do next before doing so.
It hadn't been ran in at least two years, either, but after tearing the water pump apart and taking a quick look at it, it didn't look too bad. Of course, I ordered a new water pump kit anyway, but everything was in one piece.
There wasn't a drop of water coming out of the tell tale hole when it ran in a bucket of water, so I checked the hose that comes out of the powerhead and through the lower cowling. When I put some water into the intake from a garden hose, water came out of that hose just fine, so I checked the flange that it was connected to on the lower cowling. Sure enough, absolutely nothing was going through it, so I took the powerhead off to check that. It was clearly full of salt, so I soaked it in CLR and a concoction of chemicals to try and clear the blockage, to no avail.
The only progress I've made is a second hole that I accidentally poked through the driveshaft housing with a screwdriver while I was attempting to scrape some of the salt out, right beside the blockage. However, there's a tube going from the tell tale hole upwards that is totally clear. What the heck is the purpose of all these holes???
This is the first outboard I've ever really worked on, so is there something I'm getting wrong here? Is water even supposed to get through that tiny passage, or is it just there to block the other end of the water hose off??? I've ordered all the gaskets that I need to put this thing back together, so I'd like to know what I need to do next before doing so.