inline 6 lower unit (merc 115)

[ayuh8]

i found a lower unit on ebay, NOS he"believes" it fits older inline 6 or four mercs..it does,from the pics, look exactly like mine...??? and problem..casting# is 16236051 casting fleetmaster 21 1/2 inch 8 spline,will it work on my serial# OA730776 inline 6 115 merc..my unit is still on motor so i can't look inside...

 

[Texasmark]

Re: inline 6 lower unit (merc 115)

Hip shot here. Gonna bet you that a common lower unit was (is) used for a variety of engines (of a series) for a number of years. Just makes good business sense. Besides, why change unless it is a model upgrade. On lower units, I only know of about 4 changes in 50 years on the higher hp engines. Now you might have something like a material change in the water pump, but that shouldn't affect you.<br /><br />Mark

 

[WillyBWright]

Re: inline 6 lower unit (merc 115)

The same gearcase fit inline-4 650s to inline-6 1500s. The main differences are the gear ratios. That can usually be compensated with a diffrerent prop, but I wouldn't want to put a 150 gearcase on a 65 or vice versa. Find out what it was on.<br /><br />That Fleetmaster term concerns me. I think those are made for V-6s. I dunno if that would work.

 

[flash259]

Re: inline 6 lower unit (merc 115)

i have a 115 merc i just took off and swapped it a 150 black max lower unit ok upper unit not so ok will sell or swap engine is complete can send pics if interested unit in good shape

 

[Clams Canino]

Re: inline 6 lower unit (merc 115)

I'm sure the V6 Merc lower units will not fit the I6 lower units - and visa versa.<br /><br />-W