I just recently put a temp gauge on my YM2210 and my brother-in-law put one on his YM2000. Down here in South Georgia you can never be too careful with the heat. I used a Stewart Warner model 82210-48 on my YM2210 with a Sunpro CP7574 metric adaptor. The gauge was ordered from NAPA for about $50.00 and the adaptor from Advanced Auto for about $8.00. My brother-in-law ordered his as a kit from Hoye for about $50.00 that I believe includes a Sunpro gauge and the metric adaptor. He did his first and it turned out ok. He ended up with extra capillary tubing coiled under the dash which I did not like. I then set out to find a better gauge with a shorter capillary tubing and that led me to the Stewart Warner with the 48" tubing (most I found had 60" tubing). It fit perfectly. The tubing goes down under the fuel tank, up the left side of the engine, and loops over to the sensor location with no left over tubing to coil and possibly kinking. We punched our holes with a Greenlee hydraulic punch tool with 2" die and then enlarged the hole slightly with an air die grinder. Just be sure to use teflon thread tape on the threads of the sensor mount. I did and it has not leaked a drop. My brother-in-law did not and his leaked slightly until adding the tape.
Hope this helps,
Eric
