You have either a faulty switchbox, or stator.
Mercury 110 s seem to have only been made in 1966 and 1967
The horsepower rating is one of factors needed to determine the year model of a Mercury outboard. All that can be known from the serial number only is that the "OB" model Merc was manufactured during the late eighties.
The best rated outboard motor companies are Honda, Yamaha, Mercury, Evinride, and Suzuki. These companies are rated on their performance with only a helmsman and a test equipment operator.
All that can be determined by the serial number only, is that this engine is a pre 1986 year model.
I have one of these and they were only made between 1965 & 66. Is it a Merc 1100/6 cylinder?
you can't disconnect it! you will only need to pre-mix your gaz in your gaz thank and eventually your injector pump will burn out !
My 115 EFI mercury outboard would only generate 4200 RPM. The power gradually reduced and finally levelled off at 2400 RPM. I have had other problems in the past relating to power settings. Fuel injectors and impellor have been eliminated as potential causes.
Most likely its a 1980 I just called mercury on an engine that matched that same serial number and it was a 1980 the only difference is the last number was a 9. Im sure its a 1980.
The best place to check for reliable reviews would be in a boating magazine. The Mercury outboard motor with 115 horsepower has gotten reasonable reviews. It is one of the only motors to have the shifter built into the twist tiller. It also has nearly smoke free operation. For a complete review see: http://www.boatingmag.com/engines/outboards/mercury115-hp-optimax-v-6 The 115 HP Mercury Outboard motors get very good reviews from customers and long time users. They are rated highly in terms of power, performance, reliability and efficiency.
The 1991 model, 100 hp Mercury / Mariner outboard, did in fact run on the top two cylinders only, up to the 1500 - 1800 rpm range. This was accomplished via an accelerator pump, activated by the throttle cam. Only enough fuel for sufficient lubrication is supplied at the low rpm range to the bottom two cylinders, the fire to all 4 cylinders is constant. Yamaha, and other manufacturers, have through the years sold product under the Mariner name. The largest of the Yamaha / Mariners that I can recall, being the 60 hp.
ONLY cast-iron brake cylinders can be honed!
I believe these were made in 1966 and 1967 only. 1966 serial numbers start at 1869776 1967 serial numbers start at 2097280 also look at oldmerc.com