Everything was working fine with the motor on my little houseboat until...I hit a submergered object at very, very low speeds (2-3 mph - 1500 RPM). After stopping, raising the motor and inspecting (everything looked fine) I continued at low speed and experienced some intermittent loss of power (few seconds fine, drop for a few seconds). This was accompanied by a small amount of vibration felt through the steerling whell during the rpm loss. As I continued back to my marina, the problem seemed to rectify itself...in fact it totally went away after a few minutes.<br /><br />On the next trip out, I experienced the same problem for a few minutes while coming up to speed and again it went away until I had stopped and reversed a few times. Then it came back only to go away again once moving forward for a few minutes.<br /><br />Doesn't seem to matter if the throttle is open a little or a lot. Any help would be appreciated.<br /><br />Thanks.