525SC Carbs
04-01-2008 | 06:21 PM
#1
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From: IBX
525SC Carbs
I have a couple questions if anyone can help regarding Merc 1050 Dominator Carbs that were original equipment on the 525SCs:
1. What is stock merc jetting and PV on these carbs?
2. How is the boost referenced power valve achieved and how can I tell if some 1050 blue carbs are actually blower carbs?
BT
1. What is stock merc jetting and PV on these carbs?
2. How is the boost referenced power valve achieved and how can I tell if some 1050 blue carbs are actually blower carbs?
BT
Last edited by blue thunder; 04-01-2008 at 07:23 PM.
04-02-2008 | 01:38 AM
#3
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From: Omaha/LOTO
98's and 6.5's is correct. Stock jetting is rich. Not sure about the boost referencing. Mine did have a hose and pvc valve going to the carb base. My jetting was stock with 98's even with 7.5-8#'s of boost and it was fine. Went up about 4 sizes when added a roller cam.
04-03-2008 | 06:46 AM
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Blue Thunder- What jetting was in your carb? 98's? .... Does your carb have Power valves or not?
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
04-03-2008 | 11:09 AM
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From: IBX
Blue Thunder- What jetting was in your carb? 98's? .... Does your carb have Power valves or not?
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
They have 98s square and 6.5 front and back. They were supposed to be stock and I just wanted to make sure. I was curious why merc would choose not to do the boost referencing? Do you boost reference MrHP when lowering the jets and PVs?
04-03-2008 | 11:37 AM
#7
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From: Cleveland, Ohio
The other thing I want you to do is set the float levels with the bowl off. Invert the bowl (up side down) and with a pin gauge or clean drill bit, set the floats at 23/64 or .3594 measured in the center of the float/bowl. This will correctly set the floats so they are not too low or too high. The gauge should just slip under the top of the float.
Last edited by mrhorsepower1; 04-03-2008 at 04:41 PM.
06-27-2008 | 06:20 PM
#9
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From: Wayland, MI
Blue Thunder- What jetting was in your carb? 98's? .... Does your carb have Power valves or not?
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
I have re-jetted many of these engines. I would run 93 jets square with a 6.5 power valve in the primary and 5.5 in the secondary. From stock jetting , on average the boat will pick up about 2 sometimes 3 MPH. Mercury likes to flood engines with fuel. I hope this helps.
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