FiremistSLK
Active Member
- Sep 10, 2020
- 106
- Boat Info
- 2007 Chaparral Sunesta 214 Mercruiser 5.0L MPI Alpha 1
- Engines
- 5.0L MPI 260hp w/Alpha I
Is there any way to determine the condition of the risers and manifolds on an older Mercruiser I/O without removing them? I've heard they should be replaced every 3 to 4 years or so, but how to you know if they have been done? Will a laser thermometer tell anything? The previous owner most likely will not allow them to be removed for inspection.