I have a 4.5m dehaviland which I use for inside fishing and close offshore. Last outing our mariner decided to stop for no reason that we could find right in the channel under spit bridge. It took about 30minutes of removing sparkplugs, checking fuel lines etc before it started ( never did find out why it stopped ) We fished all day inside and outside of Sydney harbour without another problem. Not to get stuck again I bought a 5hp mercury of ebay with only 3hrs use on it. I wasn't real sure about the power to push my boat but I have tried it out and it pushes her along at about 4knots which is what I wanted to get me out of the way and onto a anchor point or putt home in calm waters. As for the comments of having to service your aux every year, I don't agree! I have run 15 and 20hp aux's for years with the only service being done by me. Change plugs, change gearbox oil annually and impeller every 2 years and never had a problem. One thing I do is run the aux. for at least 1/2 hr each time out during which we just do a bit off trolling. I have had the big motors serviced at dealers ( I don't know why ) and had problems after the service. I swore the last time ( cost me $1480 was a 100hr service and the boat broke down almost as soon as we left the ramp ) that I would not take a boat back to a dealer to be ripped off. I'm sure apart from changing plugs that they didn't do anything else except put a bug into the system. I removed the thermostats and found one of them to be corroded, obviously had not been checked at the service. This is getting away from the post so I will stop but it really needles me. The amount of people I tell about my experience with this dealer I would say has cost him a lot more than he ripped off me. Regards Jeff