Mercruiser carbs
Mercruiser carbs
04-22-2019 | 10:22 PM
#6
Registered
Joined: Jan 2003
Posts: 6,019
Likes: 1,521
From: Grand Rapids, MI
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
Joined: Oct 2000
Posts: 20,242
Likes: 2,490
From: Omaha/LOTO
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.
