Changing Nissan Impellers

[artburr]

Have owned and used boats and motors for over fifty years and had to change a water pump impeller only once (I bought a used 7 1/2 HP Evinrude that appeared to have been used in salt water w/o flushing it out). Maybe I have just been lucky but it may be due to the fact that I ALWAYS flush immediately after use in salt water and seldom go more than a few months without use. Now I have have a Nissan 40C, two stroke, and a Nissan 5A, four stroke. Both are 1989 models which I bought two years ago. I suspect that they have the original impellers but seem to be working OK. If possible, I would like to change the impellers myself. I have a sevice manual for the 40C but don't find it well illustrated for impeller replacement. Is anyone aware of where I might find some good illustrations of how to go about it?

 

[John_S]

Re: Changing Nissan Impellers

Art, which part is giving you a problem? Removing the lower unit or the actual water pump disassembly? I don't have the Clymer manual in front of me, but thought it was preety well illustrated. When I did my 18E, I took pictures, but when I latter did the 40C, I believe I didn't. But will check tonight. I would consider my mechanical abilities, "middle of the road", and I found the replacement on both engine straight forward and relatively easy. I also did not have to fight with any corroaded or frozen bolts, that can make any job a PITA. I also might be able to email you some info.

 

[TOHATSU GURU]

Re: Changing Nissan Impellers

For the 40 C: Four bolts holding the unit on. One spring pin holding the shiftrods together. The unit comes off. The WP is on top of the LU. <br /><br />For the NSF5: Two bolts holding the unit on. Remove the rubber/plastic grommet on the motor leg. Loosen the bolt that holds the shift rods together. The unit comes off. The WP is on top of the LU.

 

[artburr]

Re: Changing Nissan Impellers

Elvin:<br /><br />If I order impellars, do they come with illustrated instructions?

 

[artburr]

Re: Changing Nissan Impellers

Originally posted by John_S:<br /> Art, which part is giving you a problem? Removing the lower unit or the actual water pump disassembly? I don't have the Clymer manual in front of me, but thought it was preety well illustrated. When I did my 18E, I took pictures, but when I latter did the 40C, I believe I didn't. But will check tonight. I would consider my mechanical abilities, "middle of the road", and I found the replacement on both engine straight forward and relatively easy. I also did not have to fight with any corroaded or frozen bolts, that can make any job a PITA. I also might be able to email you some info.

 

[artburr]

Re: Changing Nissan Impellers

John_s I tried to email you from your web page but it didn't work. Did you find the pictures?

 

[TOHATSU GURU]

Re: Changing Nissan Impellers

Art,<br /><br />The kits don't come with instructions, but changing them out is really as simple as it sounds...Unless saltwater has frozen the bolts or drive shaft.

 

[John_S]

Re: Changing Nissan Impellers

Art, post your email, and will send you something.

 

[bigskydrift]

Re: Changing Nissan Impellers

I too nned to change an impeller on a Nissan NS2.5A and have the OEM manual.I ordered a kit and all you get for the little 2 1/2 HP motor is the impeller itself.Before I swap the old for the new I am wondering, are there any more rubber parts, i.e. o-rings or seals, that should also be changed?

 

[artburr]

Re: Changing Nissan Impellers

Originally posted by John_S:<br /> Art, post your email, and will send you something.

 

[John_S]

Re: Changing Nissan Impellers

Art, got the email address. I will forward you something tonight. You can go ahead and delete the post, so you don't get additional spam.