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LJR1966

04-21-2019 09:49 PM

Mercruiser carbs

Hi Larry here, I am ew to this sight, I am looking for two MERCRUISER 525 SC EM CARBS, IE 1050 DOMINATOR. Does anyone know where to find?

Griff

04-22-2019 12:19 AM

There is really nothing that special about them. They are 1050's with #98 jets(rich) all around and 6.5PV's

1BIGJIM

04-22-2019 06:35 PM

Nothing special, Aren’t they Blue 😄

SB	04-22-2019 06:45 PM

Quote:

Originally Posted by Griff (Post 4683286)

There is really nothing that special about them. They are 1050's with #98 jets(rich) all around and 6.5PV's

2 circuit if I remember correctly. :)

LJR1966

04-22-2019 08:45 PM

yes they are blue. does anybody know what number air bleeds are used on primary and secondary also pump cc? what color are the accelerator pump cams on primary and secondary? looking for OEM carbs.

Rookie

04-22-2019 10:22 PM

Quote:

Originally Posted by Griff (Post 940492)

The cam is a Crane #132561

Specs are 228/236 .530/.551 on a 114 lobe sep.

The ignition timing curve is set up with 13* base timing and 22* advance. It advances to 25* by 2000rpms and then gradually advances up to full advance of 35* by 4500rpms.

Carb is a 1050 dominator
Jets are 98's all around--I think(Holley #122-98)
6.5 PV's front & back
#35 Acelerator nozzles
50cc acc pumps front & back
Acc pump cams-frt& rear--white-use # 1 hole.

Boost is set at 5.5# stock with a 2:1 ratio

Pistons are forged TRW #L2453

Valves are 2.19/1.88

...

LJR1966

04-23-2019 08:21 AM

Thanks great info, what are the air bleeds for the idle circuit and primary and secondary circuits.

LJR1966

04-23-2019 07:19 PM

Thanks great info, what are the air bleeds for the idle circuit and primary and secondary circuits.

Griff

04-23-2019 11:12 PM

Quote:

Originally Posted by LJR1966 (Post 4683590)

Thanks great info, what are the air bleeds for the idle circuit and primary and secondary circuits.

I'm not sure.
I pulled those specs out of a 525SC Merc factory service manual years ago when I posted them. I gave the manual to the person I sold the boat to.
And yes, they were 2 circuit carbs but used a 3 circuit bowl gasket, if I remember correctly.

LJR1966

04-25-2019 07:09 PM

hi does anyone have these oem 1050 dominator blue holley carbs for the 525sc motor laying around thanks ljr

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