This website has helped me in multiple ways (Impeller change, fluid change, Steering cable change, FAE install, etc.)
Here's something I learned last week. I bought a used 2004 Switch V in 2008. After a few times out to the lake, I started having overheat problems. Checked the impeller and sure enough it was "chewed" up, installed a new impeller and no issues until this summer. At the time, I wondered where the "chewed" up rubber had gone, I thought there was a chance it flowed through and out. In 2010, installed a new impeller while preparing the boat for summer as a preventive measure.
Last week, started having overheat problems again. Pulled the impeller and it was good. Pulled off the intake line to the impeller and backflushed with a garden hose and water flowed out the raw water inlet, so no blockage there. I suspected no waterpump issues, so my next step was to change the thermostat. Mechanic gave me an idea to check down line of the impeller at a common "blockage" area. Down line from the impeller is a fuel cooler, inside of the cooler is honeycomb. Sure enough, rubber from the chewed up impeller from 3 years ago had built up and lodged right at the honeycomb entrance and limited the water flow. Cleared out the rubber and everything is back to normal.
The only thing I can think concerning why this didn't happen earlier is the rubber pieces had not quite built up a dam sufficient enough to limit the waterflow.
Hope this might help someone
Here's something I learned last week. I bought a used 2004 Switch V in 2008. After a few times out to the lake, I started having overheat problems. Checked the impeller and sure enough it was "chewed" up, installed a new impeller and no issues until this summer. At the time, I wondered where the "chewed" up rubber had gone, I thought there was a chance it flowed through and out. In 2010, installed a new impeller while preparing the boat for summer as a preventive measure.
Last week, started having overheat problems again. Pulled the impeller and it was good. Pulled off the intake line to the impeller and backflushed with a garden hose and water flowed out the raw water inlet, so no blockage there. I suspected no waterpump issues, so my next step was to change the thermostat. Mechanic gave me an idea to check down line of the impeller at a common "blockage" area. Down line from the impeller is a fuel cooler, inside of the cooler is honeycomb. Sure enough, rubber from the chewed up impeller from 3 years ago had built up and lodged right at the honeycomb entrance and limited the water flow. Cleared out the rubber and everything is back to normal.
The only thing I can think concerning why this didn't happen earlier is the rubber pieces had not quite built up a dam sufficient enough to limit the waterflow.
Hope this might help someone
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