Steve: Here are the pictures I promised to you. The skis are stored at Pickwick Lake about 100 miles away from my home in Memphis, TN. I just stopped by the storage facility on my way home from Nashville to check on things. I had placed two 300 watt heaters in service on December 1, 2007 (one in each ski).
You can see from the pictures that I placed a thermometer on each engine block. When I checked the thermometers the coldest outside temp was 24 degrees and the coldest inside temp was 38.3 degrees during the period from December 1 to December 19, 2007. Looks like the heaters did a very good job keeping engine compartment temps well above freezing. I had removed the middle seat on each ski to promote air circulation into the engine compartment.
The heater itself was mounted on a 12 inch an oak plank to insulate it from the rubber matting in the foot well and to add some additional stability. The quilted furniture pads were purchased at a UHaul location. Let me know if you have any questions about what you see.
- Bill Massey, Memphis, TN
Steve: Here is an update on how the heaters have performed in the Jetskis. For the period 12/20/2007 to 01/30/2008, the lowest recorded outside temp was 15.8 degrees while the lowest inside temp was 36.4 in one ski and 40.1 in the other. Looks like the heaters did their job very well.