1974 Montgomery Ward Sea King 10HP

[OneWheelWonder]

So far I have found this motor is to be made by Chrysler. I am new to the boating world (and this forum) I assume that not all mfg's use the same style shaft for the prop to mount to. That being said, Its mounted to a 14' lowe flat bottom alum jon. The motor runs fantastic but the 2 blade prop has seen better days. It has 8 1/4 x 8 1/4 stamped in it. I assume thats the dia & pitch.

My questions are:

If I search for props in the Chrysler section of the same year will they work with my motor?

Is there a benefit to a 3 or 4 blade prop versus the 2 blade I am currently using?

 

[steelespike]

Re: 1974 Montgomery Ward Sea King 10HP

Speaking very basically a 2 blade will usually produce best speed but may struggle when loaded up.A 3 blade produces good all around performance a little better load handling.,a 4 blade usually improves low to mid range performance with slightly less top end.These details vary depending
on the brand,boat style, load etc.
Chrylser props will work on your motor.And a stock size should work if your carrying a typical load for that boat motor combination.My 89 aftermarket service manual says 2 and 3 blade props are available.either one should work
diameter may be less on the 3 thats normal.
West Bend became Chrysler in 65/66 Chrysler became Force in 85. Later Chrysler and early Force motors gearcase appears very similar.Maybe same prop.They may be able to tell if they share props in the Chrysler/Force forum.iboats does list a 8 1/2" Chrysler prop.Don't know if it is actually available.