Wandering Star
Well-Known Member
Does anyone have the correct part number for the rubber impeller for the above engine? I've tried to find the number on the internet but get conflicting results!
Thanks.
Thanks.
Volvo Penta MD7A Impeller
- Thread starter Wandering Star
- Start date
Steve_N
Well-Known Member
875583 says MD7A on it.
P.S. you're welcome to this one should you care to send me an SAE.
P.S. you're welcome to this one should you care to send me an SAE.
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VicS
Well-Known Member
I think it will depend on exactly what pump is fitted There are two possible obsolete original pump numbers listed and one replacement pump number. Consequently two obsolete impeller kit numbers , and one current kit number.
If you have an obsolete pump you may need to change the whole thing to a current pump type.
The number SteveN quotes is for one of the obsolete pump types
See http://www.marinepartseurope.com/uk/en/volvo-penta-cat-7742080.aspx
and also http://www.keypart.com/volvo-penta/diesel-engine/md7a/19761981
If you have an obsolete pump you may need to change the whole thing to a current pump type.
The number SteveN quotes is for one of the obsolete pump types
See http://www.marinepartseurope.com/uk/en/volvo-penta-cat-7742080.aspx
and also http://www.keypart.com/volvo-penta/diesel-engine/md7a/19761981
Wandering Star
Well-Known Member
Thanks for this info Vic, all I know is the engine is original to the boat which was built in 1979. There are no markings on the pump to identify which impeller will fit. The impeller Steve_N has offered me looks correct, at least visually so I'm going to take up his generous offer and see if it fits. Thanks for your help.
VicS
Well-Known Member
It will be quite obvious I think if its the right one or not. If it looks right it almost certainly is right
Even comparing the pump with the diagrams in the link I gave should tell you before removing the impeller which is what
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ghostlymoron
Well-Known Member
There are only 3 things you need to specify. No of vanes, depth of impeller, overall diameter and fixing type to shaft. (4 things). You can ask a potential supplier before buying.
VicS
Well-Known Member
"Good morning Mr parts counter person. Oh, Wayne"
"Wotcha mate .......wot d' ya want"
"I would like flexible vane pump impeller that has 7 vanes, is 2.5cm long, 55cm diameter and has a grub screw fixing it to the shaft . Please"
"No good telling me all that guff mate. Tell me wot engin it's for and I'll look it up on me compu'er to find the stock number and if we've got one"
colvic987
Well-Known Member
i have a Johnson pump on my md7a and I use a f35 impeller. the Volvo penta impeller is slightly to small for my pump which affects the amount of water which is sent around the system.
Wandering Star
Well-Known Member
Just wanted to say a public thank you to Steve, the impeller arrived today and looks to be the correct part, he also included the front cover gasket of the pump too!