Mercury V6 Blackmax 135/150HP? Year?

[85charger]

Hey y’all ,

looking for some info about this motor that I got my hands on recently.

I seem to believe it’s a very early 2.0L block, the bottom end doesn’t have any sort of casting marks where an oil pump would be.

It has 1382-6425 WH-12 1 Carbs, 5751883 bottom end numbers, 3 26 0 date code (I think) , 79714 , 1026-7261 heads. The motor bracket had the old style square three ram trim pump, with serial number A942330

let me know what you guys think year and horsepower this frankin-merc is. Trying to see if it’s going to be worth building it up faster or unloading it and buying a 2.4 of some sorts. Tried to add two pictures from my iPhone , probably awful but it’s something.

thanks

[skialot2]

Hard to tell from the pictures but it looks like it could be a very early 2.0 block with the original head bolt pattern. if it is it's going to be hard to get parts for it and not the most durable.

[tlwjkw]

first gen, pre '83.......... wh 12, '79 2.0, 150
clamp is '86

[85charger]

150hp for sure ?
worth it to spice it up a bit with a low water pick up , reeds and open up the muffler or just enjoy it for the time being until something else pops up?

[tlwjkw]

yep, 150... being first gen. wouldn't be a good idea ta me... but if it still has good comp (115 min.) ya might give it shot.. wouldn't waste spendin' any amount of $$$ or labor for any extras though............. jmo.

[85charger]

Thanks for the info and help !

[tlwjkw]

[FUJIMO]

[FUJIMO]

[FUJIMO]

...golden oldie. good motor in its day...

[FUJIMO]

...1976 thru 1979 motor. could be a 175. need to check serial number to verify though. there were many more 175's sold than 150's. they did not offer a 135 back then...

[85charger]

The serial burried behind the trigger timing arm , because it doesn’t have a freeze plug number near the flywheel?

[tlwjkw]

carbs give it up as a 150.............. thats a build date behind tha timin' arm.......

[blackmaxonly]

Looks almost identical to my 1750 from that era. Is the only difference carbs?

[85charger]

From what other things I’ve read swapping carbs on a 135hp and some other small **** pretty much makes it a 150hp, but I guess certain early years they didn’t make a 135hp