Grear Ratio 1978 1150 Mercury 115 Hp

[jimg984]

need to know the gear ratio for this motor
going to put it on a 16 foot fiberglass trihull boat which is a 1965 pipestone boat its a heavy boat the prop on the 115 is a 17 inch pitch, what can i expect for top speed with this comb.? also have motor running, never had the boat out to the lake. idles too fast prob. 1500 ---2000 rpm cant find the idle down adjuster. Selco manual says screw on top bracket top bracket works from the distrubtor is the adj one of the screws on dist

ths jimg984
TOWER OF POWER SOUNDS LIKE AN DRAGESTER LOL

 

[Laddies]

Re: Grear Ratio 1978 1150 Mercury 115 Hp

14/28 -- 2 to 1

 

[jimg984]

Re: Grear Ratio 1978 1150 Mercury 115 Hp

ths for the info how about the idle adjuster?

 

[Laddies]

Re: Grear Ratio 1978 1150 Mercury 115 Hp

I use a basic setting of 2 turns on inline 6s, some people use 1 1/2 turns, whatever it will idle at, the thing that has to be done is the engine adjusted in the water, in gear set the idle speed at 700 to 750 and start on the top card screw the mixture screw in till the engine drops RPM then richen it till it smooths out + 1/4 turn work your way down. I run the adjustments top to bottom 1 time for each carb to get the best adjustment, in the case of a 115 that would be 3 times then re adjust the idle to around 750 in gear

 

[jimg984]

Re: Grear Ratio 1978 1150 Mercury 115 Hp

i dont think the problem is with the mixture,,, and thanks for the information on adjusting the mixture

seems like the top lever is hitting the lever from the distrubtor which is hitting the metal framing and not letting the throttle plates close

can the throttle lever stop on each carb. be adjusted on the throttle shaft?