Mid 1950’s Firestone Impeller – Honda?

[Blake Monroe]

I found a YouTube video where a guy had seen a post on AOMCI about using a Honda water pump impeller for a mid 1950;s Scptt or Firestone 5 to 10 HP motors. Can anyone assist with some further info on this part number for the Honda Impeller? It was a much less expensive option than new old stock Scott impellers on the market.

[Buccaneer]

According to my notes, I ended up using Honda impellers in the two 7.5 hp bail-a-matics
I worked on. I blanked the bailer pump, and just used one impeller in each motor.
I tried other impellers as well that some people said worked, but not for me.
The part number I show was…….. 19210-ZW9-013

Some people epoxied a Honda liner into the Scott pump housing, but I was not
able to find where anyone sold “just” the liner, so I added brass sheet
on the walls of the original liner to reduce it’s diameter, so the Honda impeller would pump
nicely.

My notes……
Installed a .035 brass liner inside of the
current water pump liner to use the Honda impeller,
and made a new brass cover plate on pump.
Pump cavity ID was originally 1.685, depth .600
Pump cavity ID with brass insert is 1.632,
.053 smaller than original.
Honda impeller specs – OD 1.785 x .585

Prepare to be boarded!

• This reply was modified 2 years, 4 months ago by Buccaneer.

[Blake Monroe]

Thank you Buccaneer for the great reply! How did you blank out the BOM impeller so you are only down to one impeller?

[Blake Monroe]

Also, any good sources for the water pump oring and seals?

[Buccaneer]

Blake Monroe wrote:

Thank you Buccaneer for the great reply! How did you blank out the BOM impeller so you are only down to one impeller?

I blanked off the bailer pump by fitting an aluminum
“hockey puck” like piece in the cavity (not a photo of my motor)
like in the photo.

A photo of my pump with the homemade brass liner on the sidewall of the
pump cavity.

Regarding the O-rings, I measured the size I needed, and found some
very close on EBay……. can’t remember how they worked out,
and I can’t find a part / size number.

Prepare to be boarded!

[Blake Monroe]

Thanks for the response! I must say you guys sure do demonstrate some great Machining skills!

[joecb]

Bucc… another nice creative fix. I think that that warrants a tech article for the Antique Outboarder

Joe B

[Buccaneer]

joecb wrote:

Bucc… another nice creative fix. I think that that warrants a tech article for the Antique Outboarder

Joe B

Joe, too much time has passed and I’m not taking that darn thing back apart, lol

Prepare to be boarded!

[Author]

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