I have a volvo DP-C drive with a 5.7 indmar motor. I recently installed a clear perko flush kit and noticed I am getting some air sucked in with the water. The engine runs right at 140F, but one of the manifolds/risers is running about 150-170F - the other is nice and cool, 120-130F. The raw water pump impeller, thermostat, hoses, manifolds and risers are all less than 1.5 years old. This is a saltwater, raw water cooled boat.
Video of water getting sucked in. This is about 1200rpm
https://www.youtube.com/watch?v=ni6HbxUjHRw
While my boat seems to be running fine I don't like the air getting in, and I am going to replace the only hose that has not been replaced - the rubber molded intake hose and the associated o-rings and gaskets through the transom shield. I pulled the hose clamp on the drive end of this hose and disconnected it today, the nipple that bolts to the drive is in good shape, no pitting, cracks or corrosion. This is a common failure point I know, and it also happens to be below the waterline when I see air bubbles coming through the intake, so I know its not the problem.
My question is - do I remove this hose by unbolting the fitting on the inside of the transom, and the hose simply slides through the transom shield into the boat? I haven't seen anything in the manual or online about how to remove/install this through the transom part.
I ordered a new hose, and the oring #18 and nipple fitting #10 and it should be here in a few days.
Video of water getting sucked in. This is about 1200rpm
https://www.youtube.com/watch?v=ni6HbxUjHRw
While my boat seems to be running fine I don't like the air getting in, and I am going to replace the only hose that has not been replaced - the rubber molded intake hose and the associated o-rings and gaskets through the transom shield. I pulled the hose clamp on the drive end of this hose and disconnected it today, the nipple that bolts to the drive is in good shape, no pitting, cracks or corrosion. This is a common failure point I know, and it also happens to be below the waterline when I see air bubbles coming through the intake, so I know its not the problem.
My question is - do I remove this hose by unbolting the fitting on the inside of the transom, and the hose simply slides through the transom shield into the boat? I haven't seen anything in the manual or online about how to remove/install this through the transom part.
I ordered a new hose, and the oring #18 and nipple fitting #10 and it should be here in a few days.