Prop diameter and pitch stamp incorrect

[jfmining]

Recently pick up a Michigan prop SMC 345. When I tried to figure out info on the prop I discovered that the prop stamp designates the prop size as 1820. The prop however measured diameter is 14.75" and the pitch calculates out as between 17 and 17-1/2. Was this prop just miss stamped or maybe resized if that is even possible. The prop looks new. Does anyone have any insights.

 

[airshot]

Might very well be reworked, a good propsmith will make it look like new, however those I have had reworked have always been restamped with correct info. So your could be anything...have it checked at a prop shop to be sure your numbers are correct

 

[dingbat]

Digging into this a bit, the SMC 345 (item # 082030) is advertised as a 15 x 17 prop.

Coincidence your 1820 matches 3 of the item numbers in sequence?

​

 

[1960 Starflite]

I have a couple props with no markings. May I ask "how did you calculate the pitch".

 

[QBhoy]

Looks like a fair old diameter from pics at least. What are you using this on, if you don’t mind me asking

 

[jfmining]

I have a couple props with no markings. May I ask "how did you calculate the pitch".

i used J Lee 2013 www.propellerhub.com method

 

[jfmining]

Might very well be reworked, a good propsmith will make it look like new, however those I have had reworked have always been restamped with correct info. So your could be anything...have it checked at a prop shop to be sure your numbers are correct

Thanks for the info. As you can tell I no little about props.

 

[muhammadajmal12]

Could possibly be modified, a decent propsmith will make it look like new, but those I have had revised have forever been restamped with right data. So your could be anything...have it checked at a prop shop to be certain your numbers are right
Peace contact me here: https://forums.iboats.com/threads/prop-astroluna-diameter-doradomanana-californialoteryresults-and-pitch-stamp-incorrect.761236/

 

[jfmining]

Could possibly be modified, a decent propsmith will make it look like new, but those I have had revised have forever been restamped with right data. So your could be anything...have it checked at a prop shop to be certain your numbers are right
Peace contact me here: https://forums.iboats.com/threads/prop-astroluna-diameter-doradomanana-californialoteryresults-and-pitch-stamp-incorrect.761236/

I will have it checked, thanks