MVVS/Evoloution 58
04-01-2006, 02:37 PM
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MVVS/Evoloution 58
I have the Evolution version of the 58 and I am curious if the threaded stud in the center of the drive hub can be removed? Why is it there? There are already 6 prop bolts, is the center bolt really necessary?
04-02-2006, 12:36 AM
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RE: MVVS/Evoloution 58
Chris,
All props that I know, or ever saw, have a hole drilled in their center.
It is around this hole that the props are balanced during their production.
This engine, as well as all other model engines that have a 3/4/6 bolt mounting pattern also have this 10 mm center stud, sometimes without a thread, to center the prop on its 10 mm center hole.
Use it for what it was meant.
All props that I know, or ever saw, have a hole drilled in their center.
It is around this hole that the props are balanced during their production.
This engine, as well as all other model engines that have a 3/4/6 bolt mounting pattern also have this 10 mm center stud, sometimes without a thread, to center the prop on its 10 mm center hole.
Use it for what it was meant.
04-02-2006, 04:45 PM
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RE: MVVS/Evoloution 58
The center bolt is flanged, and holds the prop drive on the taper, so it cannot be safely removed.
If the mounting screws are not tightened regularly, the M5 bolts may be asked upon to provide the drive torque. Noty being disigned for that, they then will break, and if they do, the central nut will keep the prop on the hub.
If the mounting screws are not tightened regularly, the M5 bolts may be asked upon to provide the drive torque. Noty being disigned for that, they then will break, and if they do, the central nut will keep the prop on the hub.
04-03-2006, 05:44 PM
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RE: MVVS/Evoloution 58
Thanks for the info, I just don't like the look of the big bolt out front....guess ill just have to break down and get a new spinner.
05-05-2006, 09:24 AM
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RE: MVVS/Evoloution 58
Pe,
I can't keep the center 10mm nut on the shaft. It will loosen, and come off the shaft. Any ideas??? Here's my process of installing the prop... I slide the prop on the shaft, lineup the screw holes, and put 2 screws in the hub... I then put on the 10mm nut, and tighten very tight with a 17mm wrench... I then add the rest of the screws..... Can the nut 'bottom out"? Just weird, IMO.
Dennis
I can't keep the center 10mm nut on the shaft. It will loosen, and come off the shaft. Any ideas??? Here's my process of installing the prop... I slide the prop on the shaft, lineup the screw holes, and put 2 screws in the hub... I then put on the 10mm nut, and tighten very tight with a 17mm wrench... I then add the rest of the screws..... Can the nut 'bottom out"? Just weird, IMO.
Dennis
05-05-2006, 12:23 PM
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RE: MVVS/Evoloution 58
All those screws together will easily compress a wood prop, as I found out. And yes, the central nut will bottom out at about 21mm thickness. That is why the manual states a prop hub thickness greater than 21mm.
The central nut should be tightened last, with dexterity. It can hold the prop all by itself if need be, but that would also tighten the drive taper higher up the crankshaft cone. The M5 bolts have no influence on the taper tightness.
The 45cc engine only uses three bolts, and IMHO that is more than enough for the 58cc as well.
The central nut should be tightened last, with dexterity. It can hold the prop all by itself if need be, but that would also tighten the drive taper higher up the crankshaft cone. The M5 bolts have no influence on the taper tightness.
The 45cc engine only uses three bolts, and IMHO that is more than enough for the 58cc as well.
