This morning when I went duck hunting the temp was 7 degrees. When I got the boat in the water the steering on my Merc 115 was locked up to the extent that the motor would not turn. Back at went home I placed a heater on it, and thawed it and it seemed to work fine. I shot some grease in it and only forced a very small amount of water out. After I let it set for awhile it locked up again. Has anyone experienced this with their steering? Any ideas for a fix.