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Stainless holds it shape better under load. Aluminum blades can flex a little and reduce your effective pitch. Stainless will maintain original pitch better.is this the correct seal
http://www.ebay.com/itm/New-Johnson...0ca0099&pid=100005&rk=1&rkt=6&sd=301405343772
I decide to ge aliuimin prop.14 1/2" x 21 new old stock for $90. shipped what charcterishics are different from SS.
Usually leaking prop seals are either fishing line or age related. Salt water is no friend either and could have made the seals harden too.I will receive the 2 seals in proballey a week, bought a oil seal pick like tool looks like a pointed screw driver prybar combo.
if it looks to diffault to pick out the old seals I'll remove th e barrier piece.
about to place order for a 14 1/4 x 21 pitch SS prop new for $225. shipped
what do you Guys think the dinged prop reiuned my prop seals?
I am very anixious for a trip to the Gulf.
Results of 4[SUP]th[/SUP] shakedown w/ new aluminum 14 ¼” X 21pitch prop.
- WOT RPMs where lower at 4500 than the 14 ½” X 24 pitch which was 4800RPM
2. planed about the same as 24pitch, like right away.
I would like to have another 1KRPM at WOT
So what do I do now?
Thanks STB
I also thought is would ruin the LU seals
Exactly correct. Your 5500 RPM should be achieved when the engine is set properly on the transom and trimmed to get the bow of the hull out of the water. Over-trimming as you found puts the prop at an inefficient angle to the water and causes cavitation. As johnnygr pointed out, this can cause damage if you run it like this consistently....w/ the new 14 1/4 X 21 aluimin prop I am now able to achieve closer to the 5500desired RPM.....achieved w/ trimming up seamed like the more I trimmed up the higher the RPMs I believe it I trim up to much then the prop. loses it's traction correct.
I wouldn't read too much into him not answering his phone. Maybe he closed the shop for Thanksgiving.I did't want to chance The engine overheating so I paid a boat mechanic $200. toinstall a waterpump impeller and lower seals (remember I was getting oil in theLU oil).
Anyway after my first boat ride last week I still have waterin the LU oil.
Now wensday 11-23-16 he won’t answer the phone I reallywanted to go boating today (last kindof warm day) and run the engine dry offuel can I still do this w/ water in oil?
Well that's a pretty bad oversight by the mechanic. Glad you got that solved.the mechanic admitted to installing the oversized by water pump seals.
he overnighted the correct size seals and applied 5PSI air preasure overnight he said it held pressure.
so hoppeully it will hold.