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View Full Version : Replacing volvo penta 50L DP with a 57L engine block



scubaman
08-18-2006, 12:44 AM
I tried repairing my cracked Volvo Penta 5.0L engine block with JB Weld. It is holding but I don't trust the repair. I will replace the 5.0L DP with a 5.7L engine block. It will fit. I also think the linkage and drive shaft will fit including the dual prop. Does anyone know if I am right? Any advice will be appreciated.

haffiman37
08-18-2006, 12:55 AM
"No problems, but You would need to re-jet Your carb."

fastjeff
08-18-2006, 07:54 AM
"..."You would need to re-jet Your carb."

Maybe, maybe not. I'd bet on 'not'.

Jeff

PS: If you repitch your prop, you'll will see better gas milage as well as more speed."

haffiman37
08-18-2006, 10:21 AM
"Performance wise perhaps not, but with todays fuel quality and the risk of lean burning with 'mushroom' valves as result, I would not recommend running on the old (5.0-305) setting."

fastjeff
08-18-2006, 01:11 PM
"If 5.7 divided by 5.0 of additional air comes through a carb, more fuel comes out to maintain the fuel/ air ratio. Only if the 5.7 has some weird difference from the 5.0 would you need to rejet.

Jeff"

haffiman37
08-19-2006, 10:11 AM
"Volvo used both 2V (AQ200)and 4V(AQ225) carbs on their 305. If a 4V: no problem (same carb), but the 2V may be too lean."