OMC impeller problem

[labrador-guy]

I started working on a ’56  7.5hp Johnson that I purchased at our Traverse City MI meet.  I found that the water pump impeller has a nylon hub, it was crack and it looked like it was slipping.  First thing I thought was a cheep junk impeller but then I found the (M) designation on the rubber hub.  Usually that M signifies OEM parts.  I hope I don’t have any more of them in my fleet!  Has anyone else ever ran into this?

dale

 

[JACQUES]

Common part available  on Amazon , vintage outboard.com, iboats etc…  some  cheapy “China”  impeller cores have been known to “slip”  but that was mostly brass  cores not plastic… does your cracked core slip if you try to trurn it ???    are you just concerned… or did you have an overheat problem with your 7.5hp ??

Johnson Evinrude outboard impellers, seals, lower unit kits, water pump kits, gaskets – VintageOutboard.com

 

Chose correct  kit  year  !!!      powerhead base gaskets have  specific shapes   !!!   impeller# 18-3001 Sierra

Joining AOMCI has priviledges 🙂

[Don]

Yes indeed, unfortunately some of the OEM impellers did come with cheesy plastic hubs…

[JOSEPH BRINCAT]

I have seen that “M in a box” symbol on other service parts, like for appliances and washing machines. I suspect the its from some huge after market maker … perhaps in China

Joe

[JACQUES]

perhaps… Mexico for washing machines, stove parts like thermostats etc….

Joining AOMCI has priviledges 🙂

[Mumbles]

The ‘M’ is OMC’s trademark. The following is from Googles AI.

The OMC ‘M’ trademark<!–TgQPHd|[]–> refers to the logo of the former Outboard Marine Corporation (OMC)<!–TgQPHd|[]–>, a major American manufacturer that produced boat brands like Evinrude, Johnson, and Gale. The trademark features a capital “M” encased within a stylized, angled, or square geometric box.

OEM Verification:<!–TgQPHd|[]–> The stylized ‘M’ was used by OMC as an official proof-of-authenticity mark. It is commonly stamped on genuine factory parts (like ignition coils and water pumps) to show they are Original Equipment Manufacturer (OEM) parts rather than third-party or aftermarket products.

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labrador-guy

[Eric McNett]

M is OMC and by looks it was ready for replacement just due to age. I havent noticed a Crack in any of the plastic ones ive removed but honestly havent paid much attention to them since they’re getting replaced.

Eric McNett
"I love a challenge!"

[Author]

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