Mercury 115 4 stroke or 115 optimax Mercury 115 4 stroke or 115 optimax
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    Mercury 115 4 stroke or 115 optimax
from JimW (  
9/28/2003 10:23:00 PM


 I plan on purchasing my first boat this winter and I am trying to decide between a Mercury 115 4 stroke or 115 Optimax. The boat is a Princecraft Super pro 178 (aluminum Vee hull, 17'5" by 92", 1170 pounds dry weight, max hp 150).

I don't need lots of top end speed so the 115 should be fine, but I can not decide between the 2 motors. The Merc. is the motor of choice because better price packaged with a Merc.

Most of my fishing is spent casting for bass, but I also troll for walleye and lake trout.

Will the Optimax troll down okay or would the 4 stroke be better?

Since the optimax is new for summer 2003 would it be better to avoid a new motor for a few years in case design problems arise?

Any comments greatly appreciated.

Ontario, Canada

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   From your info... from Jeff Southern (  9/29/2003 10:45:00 AM
 If you plan to troll a lot, the 4 stroke would probably be a better choice.

   115 pr 125? from Mike (  9/29/2003 2:42:00 PM
 Check out the 125 as it is essentially the same everything as the 115...just jetted and tuned fo an addtiional 10HP. Usually priced the same.

   4 stroke has my vote from shelby (  9/29/2003 3:06:00 PM
 definately more dependable than a 2 stroke.

   Trolling from Jaws (  9/29/2003 4:47:00 PM
 I believe everyone I have talked to has told me that the Optimax will troll slower than the 4-strokes. The potential problem could be fouling the plugs.

That said, if you plan on doing a lot of trolling for walleye both of these motors will most likely troll too fast. I am currently looking at new motors also and will probably end up getting an Optimax as the main motor and a kicker.

I have not decided yet on whether to get a 4-stroke or a 2-stroke kicker.

my .02

   Four stroke from JGriff (  9/29/2003 10:29:00 PM
 Jim W--Do not know what the difference is, but I have 90hp Mercury 4-stroke. It did idle a bit fast to troll for White Bass (about 800/850 rpm), so I yanked the lid off and reset the idle to 700/750 and everything is just fine. Full limits to all! Griff

   4-stroke from Markus (  9/30/2003 3:45:00 PM
 The 4-stroke is a Yamaha painted black. You cannot go wrong with that. The 115 Optimax is a brand new Optimax model. As we all know by now, you can actually go wrong with that. I would expect the Opti to be lighter and stronger, though, so maybe it is worth the risk.

   Merc 4-Stroke or OptiMax from Chuck Casselman (  9/30/2003 7:40:00 PM
 Had the exact same question last weekend. Just upgraded to a Ranger 175V with an OptiMax 115. Will be used for fishing 90% of the time but will also use for kneeboarding/skiing. Dealer said that the 4-Stroke is really slow out of the hole and the top end speed is slower. The OptiMax will jet, gets 20% better fuel economy and should have less maintenance. It's true the Merc 4-Stroke powerhead is made by Yamaha and the Yahama gear box is made by Merc...go figure.

   Chuck.. from Jeff Southern (  10/1/2003 10:18:00 AM
 You may want to get a written statment from the dealer that the 3 cylinder Optimax will preform better than the 4 cylinder Four stroke....

   Slow! from Danny Power (  10/15/2003 3:20:00 AM
 I've had a 115 3cyl Optimax on a 5.5m fibreglass boat for 3 weeks! Trolls at 650 revs, does about 4-5km/hr. Motor was a replacement for a '96 115 4cyl merc. Gained a couple of km/hr top speed and accelleration is better. Don't believe the fuel saving claims - they are conservative. Runs on smell of an oily rag.

Tried a 4 stroke 115 (Merc version) on another boat. Acceleration was OK, but top speed seemed limited



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