stinkynathan
Well-known member
- Joined
- Mar 3, 2009
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After my ignition timing via Seloc manual fiasco, I finally rented a timing light and spent some time out on a (very busy) small lake to get things fixed up. Runs MUCH smoother, starts easier, but I didn't gain any speed. I'm OK with that since it runs so much better. Also installed a TinyTach; cool little piece of kit that is.
Motor is an early 80s Mariner 15hp. I dinged my current aluminum prop (not too bad) early this season and fixed it up with a mallet and a file. I'm getting a GPS-verified 17.2+ mph on a small glassed out lake, or 16.5 mph on the choppier lake I timed it on. It has a 9.25x10P prop on it now that runs at 4800 RPM at WOT. Operating RPM range for this motor is 4500-5500.
I'm pretty satisfied with the holeshot right now; it pops up on plane pretty quickly then creeps up to top speed. What can I do to increase my top speed? It would be nice to get 20mph out of this thing. It seems that I could gain some speed by cruising at higher RPMs, but I don't know what I would need to order to get there.
Thanks for any help.
Motor is an early 80s Mariner 15hp. I dinged my current aluminum prop (not too bad) early this season and fixed it up with a mallet and a file. I'm getting a GPS-verified 17.2+ mph on a small glassed out lake, or 16.5 mph on the choppier lake I timed it on. It has a 9.25x10P prop on it now that runs at 4800 RPM at WOT. Operating RPM range for this motor is 4500-5500.
I'm pretty satisfied with the holeshot right now; it pops up on plane pretty quickly then creeps up to top speed. What can I do to increase my top speed? It would be nice to get 20mph out of this thing. It seems that I could gain some speed by cruising at higher RPMs, but I don't know what I would need to order to get there.
Thanks for any help.