Water Pump Impeller?

[Quadd4]

I'm changing the waterpump impeller on an old Chrysler 6 HP Outboard. The impeller that I'm removing has 10 blades and the new one I ordered has 6. Should I return it or will the 6 work just fine?

Thanks for the help.

[Jason Adam]

I would contact whomever makes the impeller and ask them if the 6 blade is the correct replacement. All that really matters is that the correct GPM of water is flowing through the engine. Its possible that a six blade could still push the right volume of water based on several other factors.

Also, you'd get more responses placing this in the boat forum.

[Quadd4]

Thanks Jason! I contacted the dealer today and he knew about the 10 blade vs 6 blade. He indicated that the 10 blade was about 50 bucks and pushed less water than the 6. The 6 cost only $15 so it's a no brainer! More water - less money.

I was hoping to get it installed yesterday thus the reason for the post. A day late isn't so bad!

[Burksee]

Thanks Jason! I contacted the dealer today and he knew about the 10 blade vs 6 blade. He indicated that the 10 blade was about 50 bucks and pushed less water than the 6. The 6 cost only $15 so it's a no brainer! More water - less money.

I was hoping to get it installed yesterday thus the reason for the post. A day late isn't so bad!That's odd that the 10 is more expensive but pushes less water? Wonder why they'd even offer both? Would the 10 be more durable even though it pushes less? :confused:

[TONGA]

I will go out on a limb here and say that the ten blade impeller is probably an NOS part, probably difficult to mold and no longer easy to get, while the new 6 blade is probably the quicksilver replacement for the part (a mercury part with a different shaft insert) probably plenty available and a more durable to boot.

[FREEPOP]

probably difficult to mold

I agree and more rubber, more money, less space between the "blades"