Prop Thrust Washer

[Jason2tpa]

I have a prop I want to test in my never ending search, it's a quicksilver renegade 13 x 18 SS. I don't recognize the hub kit installed. The thrust washer I've used with my other prop seats in the hub completely different than the hub installed in this quicksilver prop (pictured). The thrust washer pictured is what mine looks like (I've used this thrust washer with michigan wheel xhs and flo-torq hubs).

Is the design of a thrust washer specific to the engine? Meaning, a yamaha thrust washer is to be used for all hub kits, whether or not the thrust washer sits on top of hub (like it would with the quicksilver prop hub pictured) or seats in the hub (like it does with m.w. xhs and flo-torq)?

[Jason2tpa]

I can see you put it on the outside, it shouldn't be there...

Scott, we must be lost in translation. Not sure what you're referencing ^^^. There is no washer pictured with the prop hub pictured. Im 100% on what order the prop hardware is installed. What I am uncertain of is if my yamaha thrust washer can be used with any hub system (yamaha specific thrust washer).

Also, you mentioned the washer tapered end should fit inside front of hub. This is the reason why I've started this thread. My yamaha thrust washer does not seat inside the barrel. It sits on top, its diameter being the exact diameter of the barrel. With my other prop that has a flo torq hub, the washer flange actually seats inside the barrel and the disk lays on top of the barrel.

[99yam40]

My XHS hub and prop came with a different thrust washer, but I had to reuse my old flat washer and nut from the pressed in hub prop I had.

actually they sent me the wrong thrust washer in the hub/prop kit, it fit but not correctly.
it was for a Mercury motor.
they sent me the one for my Yamaha after I notified them.

if that Mercury prop has a pressed in hub your thrust washer for XHS will not work

[Jason2tpa]

My XHS hub and prop came with a different thrust washer, but I had to reuse my old flat washer and nut from the pressed in hub prop I had.

actually they sent me the wrong thrust washer in the hub/prop kit, it fit but not correctly.
it was for a Mercury motor.
they sent me the one for my Yamaha after I notified them.

if that Mercury prop has a pressed in hub your thrust washer for XHS will not work

I installed the prop using the same thrust washer, spacer, and nut used with my other prop, which had an xhs hub that i just replaced with flo torq. The prop mounts onto the shaft as it should, and the nut can be torqued down to spec to allow cotter pin insertion.

[99yam40]

is this prop made for the XHS or a pressed in hub?

[Jason2tpa]

In bold above, I was referring to your prop pic where there's obvious brass filings and it appears the washer was tightened down on the outside (freshly scraped inner hub).

As noted, the Yamaha (and every other engine) will have certain spec's for that washer to fit the prop shaft.

Depending on the prop manufacturer, the washer OD may very well be different however YOUR 115 prop shaft is a specific size requiring a specific sized washer for it..

I think I answered / cleared it up..

.

Yup, I gotcha. That's also what concerned me. I stopped by my local marine shop after I picked up this prop. Showed them my thrust washer and how it would mount on top of the hub. They said the thrust washer is used primarily as a spacer, between gear case and hub. And regardless of whether the washer's flange sits in the hub or sits on top, the prop barrel spins against the washer. Therefore it's not an issue. It would be an issue if I used a thrust washer not specific to my engine. That's what they said.

Sooo, this gave me some comfort to install so I did. The prop spun by hand without any grinding sound. Nice and smooth. Ran the boat, no vibrations or any other sounds or feeling that something was wrong. Didn't have time, but I will take prop off and look at the hub and washer to be sure they both are not damaged.

[Jason2tpa]

is this prop made for the XHS or a pressed in hub?

It's a Quicksilver Renegade, so I recon it could accept either or.

[99yam40]

never seen a prop that could use either or

[Jason2tpa]

Well after a long prop search I believe I've found the right one. At least the engine/boat perform a heck of a lot better with it than the 21" pitch prop I've been using. Here's the details for those interested:

'76 Aquasport 170
'98 Yamaha S115TLRW (spec rpm range @ WOT 4500-5500)
Total Test Load: 1850lbs
Test Conditions: Crappy
Test Prop: Quicksilver Renegade 13 x 18 SS Non-vented

RPM.. MPH.. Slip
3500.. 26 .. 13
3900.. 30.. 9
4300.. 34.. 8
4700.. 37.. 8
5100.. 43.. 1
5400.. 45.. 2


The 21" prop I've been using is a Michigan Wheel Apollo SS 13.25 x 21, SS, vented. At 3700 rpms and 31 mph the slip was 15. At WOT rpms of 4700, 40 mph, slip was 14. Slow hole shot, though i could maintain plane at very low rpms (2100-2200)

The drop down of 3" of pitch got me an increase of 700 rpms and 5 mph. Kinda anxious to see the performance in perfect conditions. What a difference 3" of pitch can make with performance. My engine was screaming as I've never heard it scream before. And you know 2 strokes can scream!

[Jason2tpa]

Well after a long prop search I believe I've found the right one. At least the engine/boat perform a heck of a lot better with it than the 21" pitch prop I've been using. Here's the details for those interested:

'76 Aquasport 170
'98 Yamaha S115TLRW (spec rpm range @ WOT 4500-5500)
Total Test Load: 1850lbs
Test Conditions: Crappy
Test Prop: Quicksilver Renegade 13 x 18 SS Non-vented

RPM.. MPH.. Slip
3500.. 26 .. 13
3900.. 30.. 9
4300.. 34.. 8
4700.. 37.. 8
5100.. 43.. 1
5400.. 45.. 2


The 21" prop I've been using is a Michigan Wheel Apollo SS 13.25 x 21, SS, vented. At 3700 rpms and 31 mph the slip was 15. At WOT rpms of 4700, 40 mph, slip was 14. Slow hole shot, though i could maintain plane at very low rpms (2100-2200)

The drop down of 3" of pitch got me an increase of 700 rpms and 5 mph. Kinda anxious to see the performance in perfect conditions. What a difference 3" of pitch can make with performance. My engine was screaming as I've never heard it scream before. And you know 2 strokes can scream!

[99yam40]

Scott, you failed to say what size and pitch prop they installed and what you ended up with.

was it the same as they used in the PB

[pstephens46]

Be nice if all the prop companies etched that info on the side of boss.

Good marketing. Website too..

[dray0151]

[QUOTE=pstephens46;142731]Be nice if all the prop companies etched that info on the side of boss.


Yes wouldn't it! Then I might actually know what is on my 115. All it has that I can find are the 4 numbers 9542??????

[Jason2tpa]

Be nice if all the prop companies etched that info on the side of boss.

Good marketing. Website too..

I do find this odd. Why wouldn't they want the company name on the prop, that's what i ask myself. My father asked me to sell his spare SS 4 blade off his F150. The only marking on or inside the prop is 21, which indicates pitch. But thats it. Ridiculous.