Quinc
Buy a Superjet
- Location
- California
Anyone use it when putting in a new crank?
Other Plastigauge?
- Thread starter Quinc
- Start date
Quinc
Buy a Superjet
- Location
- California
- Location
- the jetski grave yard
yea, 25 years ago when i built car motors......... put it in, torque the bearing caps, remove them and measure how wide it squished down , which tells how many thousandths clearance you have. too tight and you burn up bearings. too loose and you dont have enough oil pressure.
Quinc
Buy a Superjet
- Location
- California
Why don't you use it on ski engines?
- Location
- the jetski grave yard
you obviously aint no mechanic. you dont use it on ball bearing type bearings.
Quinc
Buy a Superjet
- Location
- California
You could fill the outside of a barn with what I do not know about engines. Hopefully after this rebuild I will never have to rebuild an engine again. =)
- Location
- Cruising Around
You must plan on selling your skis. Rings at bare minimum every season in a perfect world.
Quinc
Buy a Superjet
- Location
- California
Even if compression is good/unchanged? I might have to micro slick them so they last longer.
- Location
- mobile alabama
here is your answer
no need to plastigauge a 2 stroke because bearings and ases are not adjustable like in a 4 stroke w plain bearings
no need to plastigauge a 2 stroke because bearings and ases are not adjustable like in a 4 stroke w plain bearings
- Location
- mobile alabama
cases not ases
Idok
F1pro
- Location
- Nations oldest muthaF+++kin city
thats BS
- Location
- Cruising Around
You maintain your stuff your way and I will maintain mine they way I've done for over 30 years. Calling BS is an ignorant statement concerning basic 2 stroke maintenance. Have you ever read the service intervals in a factory service manual for 2 stroke operation? Periodic ring replacement and general inspection increases bore life, aids in avoiding catastrophic failure and maintains performance levels that we originally pay for.
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- Location
- Ogden, Utah
Your question isn't really as absurd as the responses are making it sound, but it is a little misguided. The dimension of bearing surfaces of the cases is a critical one but it's a slight interference fit rather than a clearance so you can't check it with plastigauge. You don't see as many issues in the PWC world but in the snowmobile industry I'm constantly having to line bore cases because the cases become worn.
Quinc
Buy a Superjet
- Location
- California
What is the best way to verify the cases are good and the crank is going to last? I replaced the crank because one of the bearings was worn out. It could have been basic wear but I am hoping to avoid any future problems.
- Location
- the jetski grave yard
i know there are lots of guys that like working/tinkering on their junk more than actually riding. i'm just the opposite.
- Location
- Cruising Around
You guys are right. Re ringing and inspection are a waste of time and money. Not sure what I was thinking bringing it up. Thanks for setting me straight about maintenance.
- Location
- Ogden, Utah
The right way would be to torque the cases without the crank installed and use a bore gauge to verify the dimensions, but that's overkill for a do-it-yourselfer. In reality a quick visual inspection of the surfaces and feeling for any variances on the bearing saddles will give you an idea if they are good or bad. In most most cases you will feel or see a lip where the bearing sits vs. where it does't if they are bad. I attached a pic of a set of snowmobile cases. Where the pick is pointing would be where you would feel a lip if the cases were bad. You'll always see some chatter marks like you do in the picture, but you shouldn't feel any variances in the bore when running your finger across it.
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- Location
- Victoria BC
If you are really worried about the clearance you could put a dot of loctite bearing retainer on the surfaces and assemble. Wont hurt anything.