Jeepster04
Chief Petty Officer
- Joined
- Jan 5, 2009
- Messages
- 481
Last summer our port engine started overheating under throttle. The impeller was changed 3 years ago so I assumed it wasn't bad. Come this summer, the issue was getting progressively worse eventually to where anything over idle would cause the engine to overheat when in gear (never let it get over 200F). The boat was pulled out spring 2011 and the out drives were serviced. While it was pulled, I replaced the elbow on top of the out drive so I knew it was good but we didnt replace the hose on the out drive since we didnt have time. I immediately assumed the hose was bad since it was the worse case scenario and would require pulling the boat out of the water and taking the top gear case off the out drive. We had decided rather than doing that we would utilize a spare through hull stand pipe with a strainer.
First thing I did was buy a 1-1/4" ID clear hose so I could check for air coming from the out drive. What we discovered was there isnt any air coming from the out drive nor is there much water at all coming from the out drive. Picture and vids will follow:
First we bypassed the intake hose coming from the out drive to the intake on the raw water pump:
http://smg.photobucket.com/albums/v612/jeepjeepster/?action=view¤t=VID-20120902-00022.mp4
http://smg.photobucket.com/albums/v612/jeepjeepster/?action=view¤t=VID-20120902-00021.mp4
What you see is when the engine is rev'ed, the water stops flowing completely. While idling, the water will momentarily stop flowing them start flowing again. After that, we put the clear hose between the raw water pump and the thermostat hosing, just to see if there was any air coming from it:
Now Vids of that, but it did exactly the same thing.. After that, we thought maybe there was a blockage in the outdrive, so I bypassed the out drive all together and sucked directly out of the lake:
Once again, we had the same result, so we took the circulating pump off to check for any kind of blockages:
First thing I did was buy a 1-1/4" ID clear hose so I could check for air coming from the out drive. What we discovered was there isnt any air coming from the out drive nor is there much water at all coming from the out drive. Picture and vids will follow:
First we bypassed the intake hose coming from the out drive to the intake on the raw water pump:
http://smg.photobucket.com/albums/v612/jeepjeepster/?action=view¤t=VID-20120902-00022.mp4
http://smg.photobucket.com/albums/v612/jeepjeepster/?action=view¤t=VID-20120902-00021.mp4
What you see is when the engine is rev'ed, the water stops flowing completely. While idling, the water will momentarily stop flowing them start flowing again. After that, we put the clear hose between the raw water pump and the thermostat hosing, just to see if there was any air coming from it:
Now Vids of that, but it did exactly the same thing.. After that, we thought maybe there was a blockage in the outdrive, so I bypassed the out drive all together and sucked directly out of the lake:
Once again, we had the same result, so we took the circulating pump off to check for any kind of blockages:
