ccruiser91
Cadet
- Joined
- Dec 2, 2012
- Messages
- 7
Good morning;
I have an 86 Mercury 25hp outboard, s/n 0b172098, on a 2006 Cobra R208 River Boat.
Here are some details about my engine:
It is in very good shape. The gentleman who owned it before me did everything right. It was winterized properly and looks and has run great.
I wasn't able to use the boat last year and am hoping to use it soon. I decided to replace the impeller and even though my motor didn't have a thermostat, according to the s/n, it was supposed to, so, last week I added the thermostat, gasket and impeller and those procedures went well. I blew out the hose running from the thermostat to the tell-tale and from the thermostat housing through the block and met no restrictions. I put the motor in a barrel, added enough water to cover the cavitation plate and fired it up. Water wasn't "shooting" out of the tell-tale, but, it was coming out in a steady stream. The volume increased once the thermostat opened, but, once again, it wasn't shooting out like I thought it would.
It was then I noticed water coming out of the seam where the lower unit butts up against the drive shaft housing (the four bolts that attach the lower unit to the shaft housing were torqued to 25ft/lbs, per the Seloc manual instructions, after the impeller change). I immediately figured I must have misaligned the copper water tube that runs from the impeller up to the block. I took the motor out of the water, drained and removed the lower unit and dried up the water that had collected around the impeller. I looked up the drive shaft housing to see if I might have knocked a fitting/bushing loose where the copper tube fits into the head and everything looked ok. As I reinstalled the lower unit, being extra cautious, using an extra pair of hands (my wife's) along with a good flashlight, I made sure everything was perfectly aligned this time, and it was. I bolted everything back together, filled the lower unit, put it back into the "test tank", fired it up again and had the exact same results as before.
I removed the lower unit again and had the idea to remove the copper water tube from the impeller, then install it back up into the head and blow through the hose from the tell-tale, to see if I could feel any air coming through the copper tube and felt nothing. In fact, removing my finger from the end of the copper tube and replacing it, like one would do keep a liquid in a straw, didn't even change the sound of the air I was blowing through the tell-tale tube. I'm thinking I need to replace the parts listed as #3 and #4 in the attached diagram, or could it be indicative of something else? I really want to fix this motor and cannot afford to replace the whole thing at this time so any advice is appreciated. Thank you in advance for your assistance.
I have an 86 Mercury 25hp outboard, s/n 0b172098, on a 2006 Cobra R208 River Boat.
Here are some details about my engine:
It is in very good shape. The gentleman who owned it before me did everything right. It was winterized properly and looks and has run great.
I wasn't able to use the boat last year and am hoping to use it soon. I decided to replace the impeller and even though my motor didn't have a thermostat, according to the s/n, it was supposed to, so, last week I added the thermostat, gasket and impeller and those procedures went well. I blew out the hose running from the thermostat to the tell-tale and from the thermostat housing through the block and met no restrictions. I put the motor in a barrel, added enough water to cover the cavitation plate and fired it up. Water wasn't "shooting" out of the tell-tale, but, it was coming out in a steady stream. The volume increased once the thermostat opened, but, once again, it wasn't shooting out like I thought it would.
It was then I noticed water coming out of the seam where the lower unit butts up against the drive shaft housing (the four bolts that attach the lower unit to the shaft housing were torqued to 25ft/lbs, per the Seloc manual instructions, after the impeller change). I immediately figured I must have misaligned the copper water tube that runs from the impeller up to the block. I took the motor out of the water, drained and removed the lower unit and dried up the water that had collected around the impeller. I looked up the drive shaft housing to see if I might have knocked a fitting/bushing loose where the copper tube fits into the head and everything looked ok. As I reinstalled the lower unit, being extra cautious, using an extra pair of hands (my wife's) along with a good flashlight, I made sure everything was perfectly aligned this time, and it was. I bolted everything back together, filled the lower unit, put it back into the "test tank", fired it up again and had the exact same results as before.
I removed the lower unit again and had the idea to remove the copper water tube from the impeller, then install it back up into the head and blow through the hose from the tell-tale, to see if I could feel any air coming through the copper tube and felt nothing. In fact, removing my finger from the end of the copper tube and replacing it, like one would do keep a liquid in a straw, didn't even change the sound of the air I was blowing through the tell-tale tube. I'm thinking I need to replace the parts listed as #3 and #4 in the attached diagram, or could it be indicative of something else? I really want to fix this motor and cannot afford to replace the whole thing at this time so any advice is appreciated. Thank you in advance for your assistance.
