I just bought it and am going to use it as a trolling motor. It hadn't been run for quite awhile. Put it in a barrel of water, fired it up, smoked a little, then putted right along. Water was pumping out, then stopped. I'm wondering if I should look at the impellor first, then tackle the waterpump next if necessary. Was told the impellor can be changed from the bottom, but the waterpump can only be gotten to after removing the powerhead. Can anyone shed some light on the this for me. I'm thinking a manual is in order. Any recommendations for a manual for this motor? Thanks so much for the help.