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04-02-2019, 07:22 PM
Senior Member
04-02-2019, 07:46 PM
Actually the bearing was spinning on the crankshaft not in the case. I think the case is fine. Just need to get a better quality bearings now.
04-03-2019, 01:34 AM
Have you decided which bearing option you'll order from Boca? I was thinking of ordering the $24 high performance C3 fit bearings. They have a plastic retainer and hard chrome balls. Others here have reported having no problems with the $15 standard bearings with metal retainers and hard chrome balls.
Stainless is another option in case you're not a religious user of after run oil however both sets of rc bearings that recently went bad on me were stainless. Just over a gallon of fuel on those and aro was used religiously. I'm wondering if the stainless balls are having problems holding up to the heavier 4 stroke vibrations.
Last edited by Glowgeek; 04-03-2019 at 01:51 AM.
04-03-2019, 01:52 AM
I am going back to buying name brand only, and only from the local store-front supplier. No more internet purchases. Bought less than half of my bearings online as it was. Never had a problem aside from one batch. That one batch came direct from China , not RCBearings and was absolute garbage.
It also pays to measure ALL new bearings all around and compare to original before trying to install them. Easy enough to do!
Better to know if that inner race is too thin or not.
All about fitting.
It also pays to measure ALL new bearings all around and compare to original before trying to install them. Easy enough to do!
Better to know if that inner race is too thin or not.
All about fitting.
Last edited by Jesse Open; 04-03-2019 at 01:55 AM.
04-03-2019, 01:55 AM
I am going back to buying name brand only, and only from the local store-front supplier. No more internet purchases. Bought less than half of my bearings online as it was. Never had a problem aside from one batch. That one batch came direct from China , not RCBearings and was absolute garbage.
It also pays to measure ALL new bearings all around and compare to original before trying to install them. Easy enough to do!
It also pays to measure ALL new bearings all around and compare to original before trying to install them. Easy enough to do!
Last edited by Glowgeek; 04-03-2019 at 02:03 AM.
04-03-2019, 02:03 AM
Just a quick check of relative internal clearances by measuring ID to OD differences with opposing loads.
Mic the OD, ID, inner and outer widths as well. I always preheat the housing and use sized driving arbors when installing bearings. A few carryover practices from the machine repair days.
Mic the OD, ID, inner and outer widths as well. I always preheat the housing and use sized driving arbors when installing bearings. A few carryover practices from the machine repair days.
04-03-2019, 02:29 AM
Maybe I over tightened the props on these last two engines with failing new bearings. Is it possible to ruin bearings that way? I don't use a torque wrench or anything, just go by feel, but I do tighten the prop nuts fairly aggressively.
04-03-2019, 02:45 AM
I have a tendency to strong arm my prop nuts too
and myself have not experienced any problems with that. But once again that’s me.
Besides is there even a torque spec for that?
04-03-2019, 02:48 AM
Pretty darn hard to think so. If the internal spaces between the races are properly set up and the bearing races are seated where they belong, the prop nut should make little if any difference.
04-03-2019, 03:43 AM
Dave my apology to geri,terrible memory for names,some of my conversations are like this
Here's a pic of my fa82 after a bearing change,i use top quality japanese bearings.
04-03-2019, 03:54 AM
04-03-2019, 07:00 AM
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Glo, be careful with those C-3 bearings, I have two here now, not from Boca, that when installed they turn hard. Take them out and they turn fine. They're kind of a waste in four strokes any way.
04-03-2019, 07:13 AM
No joke
04-03-2019, 07:13 AM
04-03-2019, 07:16 AM
04-03-2019, 07:25 AM
That looks like corrosion as opposed to galling. Problem I have with castor is I don't like the smell and it lingers for a long time. I like the smell of Wildcat fuel though, smells like aftershave.
04-03-2019, 08:05 AM
That is a great place to shoot the ARO..
Edit: I see the vent that I think you are referring to is at the case bottom(?)
Yep, it looks just like that.
Never tried aftershave in the fuel
Edit: I see the vent that I think you are referring to is at the case bottom(?)
Never tried aftershave in the fuel
Last edited by Jesse Open; 04-03-2019 at 08:10 AM.
04-03-2019, 08:48 AM
Sorry, but I missed this one earlier:
The "C" and "C3" ratings involve internal clearances between the rolling elements.. "Fit" is a different issue, regarding how loose or tight a bearing fits the bore and shaft. I measure the ID and OD for fit also,check width across inner and outer races.
The C3 rated bearings are supposed to have greater internal clearances than the C Normal rated bearings. If you want tighter bearing internals, C Normal is tighter than C3.
The C3 rated bearings are supposed to have greater internal clearances than the C Normal rated bearings. If you want tighter bearing internals, C Normal is tighter than C3.
04-03-2019, 11:32 AM
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New Saito guy
I just acquired my first Saito, I usually run OS two strokes, electrics, or large gasers, it's a Saito 180 Golden Knight that is going into my 1.20 P6E hawk. I'll post pics when I get some. Glad to be here.
