Rizzo Posted June 29, 2012 Report Share Posted June 29, 2012 Was putting my prop back on tonight, It seemed to be tightening up well, but then when I went for that extra quarter turn on the prop nut, it actually got looser (like I had stripped it). Is it possible to strip something like that? I could see the hole for the cotter pin, so I did put it in and the prop seems reasonably snug, just don't know what happened there? Everything fine or did I just ruin my fishing for tomorrow? I had the motor in gear while I was turning it if this means anything. Link to comment Share on other sites More sharing options...
ccmtcanada Posted June 30, 2012 Report Share Posted June 30, 2012 I had a 1983 Merc 18hp that did exactly the same thing. While tightening it up, without a LOT of effort, it would loosen up. Before each trip I did a quick hand check of the nut and it never ever came off. I always had a spare prop handy just in case, but never had to use it. Link to comment Share on other sites More sharing options...
Rizzo Posted June 30, 2012 Author Report Share Posted June 30, 2012 Thanks Cliff. Hopefully its the same thing. Its not like I really torqued the thing, was just giving it a bit extra "oomph". Link to comment Share on other sites More sharing options...
DRIFTER_016 Posted June 30, 2012 Report Share Posted June 30, 2012 Could be the prop wasn't seated all the way on the shaft and that was just it slipping the last bit to seat it. The retainer/cotter pin will keep it from falling off if it's not quite all the way tight. That's it's job. Link to comment Share on other sites More sharing options...
Rizzo Posted June 30, 2012 Author Report Share Posted June 30, 2012 oh, there's a thought...maybe I should take the pin back out and try and tighten it a few more revolutions...see if it gets tight then Link to comment Share on other sites More sharing options...
Terry Posted June 30, 2012 Report Share Posted June 30, 2012 (edited) Could be the prop wasn't seated all the way on the shaft and that was just it slipping the last bit to seat it. The retainer/cotter pin will keep it from falling off if it's not quite all the way tight. That's it's job. that was my thought too Edited June 30, 2012 by Terry Link to comment Share on other sites More sharing options...
Rizzo Posted June 30, 2012 Author Report Share Posted June 30, 2012 Bing Bing Bing we have a winner, OFC to the rescue again. Couldn't take the suspense...pulled the pin back out, tighten another revolution or so and NOW its tight. You guys were right, was just shifting I guess...maybe that's what Cliff's motor was doing too! Link to comment Share on other sites More sharing options...
ccmtcanada Posted June 30, 2012 Report Share Posted June 30, 2012 Bing Bing Bing we have a winner, OFC to the rescue again. Couldn't take the suspense...pulled the pin back out, tighten another revolution or so and NOW its tight. You guys were right, was just shifting I guess...maybe that's what Cliff's motor was doing too! Interesting! Could very well have been the problem! Link to comment Share on other sites More sharing options...
DRIFTER_016 Posted June 30, 2012 Report Share Posted June 30, 2012 FYI A little grease on the prop shaft and it will slide on better and stop corrosion. Link to comment Share on other sites More sharing options...
bigbuck Posted June 30, 2012 Report Share Posted June 30, 2012 Don't tighten too much. Hitting a rock can make a tight prop nut a total bear to get off. Snug is good enough. Link to comment Share on other sites More sharing options...
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