Mercruiser carbs
Mercruiser carbs
04-22-2019, 06:45 PM
#4
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04-22-2019, 08:45 PM
#5
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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.
04-22-2019, 10:22 PM
#6
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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
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
04-23-2019, 11:12 PM
#9
Charter Member # 55
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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.
