byoungplumbing(at)gmail.c
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 Posted: Mon Sep 01, 2014 7:07 am Post subject: Prop inertia & the B box |
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Richard good post the article you scanned in was a good read.
when I read the second paragraph "Plotting your prop inertia" (see the
second attachment below,,, ~~prop 2~~ ).... near the bottom. I found the
following information... I am paraphrasing,,,,it states if your inertia is
under 3000 use an a or b box,, if the inertia is between 3000 and 6000
use a C box,,, above 6000 not advised for 2 stroke.... this much we all
agree on....
still paraphrasing,,,,,,, it says,, if you are over the limits, you may
want to go to the next larger gear box, or live with what is probably a
rough idling engine, change props, or use a prop balancer. there was no
mention that it would rip the gears out, or run rough,,,, only idle
rough,,, john mentioned if you idle at a faster speed it will eliminate
the roughness,,, , this is probably the cheapest / easiest advice I have
seen on the list as a solution for this issue. next is buy a larger gear
box or lighter prop.
I always idle faster than the minimum recommended speed anyway,,, that has
always made things run smother / last longer. because the enrichener
works best at a lower idle setting, my throttle will go down to a lower
rpm... but as soon as the engine is running I bump the throttle to 2000.
this works for me,,, your mileage may vary, again worth your subscription
price.
boyd young
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
My soul shall be joyful in the LORD; It shall rejoice in His salvation.
Psalm 35:9
Attachments:
http://forums.matronics.com//files/prop1_176.jpg
http://forums.matronics.com//files/prop2_417.jpg
http://forums.matronics.com//files/prop_3_745.jpg
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