The oil comeing out the exhaust is normal. Just unburned fuel and oil. Check the lower unit for anywater just in case one of the seals is leaking. I would for sure change out all the fuel lines on the motor. New impeller at the least and if the housing has deep groves the whole pump kit...
I have a Jason Mitchel Nanook and removed all that heavy hardware for the seats and just use a folding lawn chair. Easy to load in the back of a truck. I think the weight of it was all that seat hardware.
Not sure of the weight but they are heavy! I have 2 HW 95s, a.177 and a .22 and a HW97 underlever. More than my deer rifle for sure. Shooting flys at 20yrds is not a problem with a good rest.
A good tuned springer like a HW Weihrauch (There are others but hw is my favorite) doesnt suck. With a good pellet they will shoot and if you do a lot of shooting the pellet price compared to 22 shells will pay for itself. Above your price but just thought I would have to say all springers dont...
Ion for me. I dont need a $300 drill for my home use so a good auger is the way I went. Reopens the holes in my ice castle great and works good for the portable to. Plenty of battery life for the way I fish.
First thing to try is to just rebuck the rivets. if that doesnt work replace them or use the Gluvit that was recommended In most cases that I have been around just tightening them back up works.