Author Topic: Test Your 2-Stroke Knowledge...  (Read 4058 times)

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Offline moonpup

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Confucius say... "Better to have Bridgestone than Kidneystone"

Offline slawsonb

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Re: Test Your 2-Stroke Knowledge...
« Reply #1 on: January 26, 2017, 11:27:45 AM »
24 of 30 here...(incorrectly selected one...oh well).  ;D
Thanks for posting 'pup!
...bert

Offline old smokey

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Re: Test Your 2-Stroke Knowledge...
« Reply #2 on: January 26, 2017, 11:12:36 PM »
22, guess I better defer to slawsonb  ;D
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Offline OldSwartout

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Re: Test Your 2-Stroke Knowledge...
« Reply #3 on: January 27, 2017, 09:04:41 AM »
28 out of 20. Guess I'm on a roll today.
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Offline BRT-GTR

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Re: Test Your 2-Stroke Knowledge...
« Reply #4 on: January 27, 2017, 09:12:24 AM »
          Some toughies in there, no2 really stretched me :D.    Damn those pesky large 2S marine engines. Wasn't gonna say but 28 also.
        Be interesting to see how far they go with fuel injected 2S engines. Must bring my knowledge up to date. Karl, you raised an FI question the other day.
           Good post, Mike, not seen this one before.
« Last Edit: January 27, 2017, 09:28:16 AM by BRT-GTR »
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Offline moonpup

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Re: Test Your 2-Stroke Knowledge...
« Reply #5 on: January 27, 2017, 09:26:36 AM »
22, guess I better defer to slawsonb  ;D

Looks like I'm gonna have to defer to everyone!   :'(
« Last Edit: January 27, 2017, 09:28:24 AM by moonpup »
Confucius say... "Better to have Bridgestone than Kidneystone"

Offline slawsonb

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Re: Test Your 2-Stroke Knowledge...
« Reply #6 on: January 27, 2017, 10:36:37 AM »
Hey 'pup, that's what this big happy family is for. Everyone brings their own thing to the party and you definitely have the Sleuthing Crown!
...bert

Offline BS Mechanic

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Re: Test Your 2-Stroke Knowledge...
« Reply #7 on: January 27, 2017, 08:46:50 PM »
I take issue with at least one of the answers;  Every small two stroke mower or chain saw I've seen has been a reed valve type, not piston port.  I'm not sure the author has numbers to back up the claim that piston ported engines are more common.  May have been true in the past, when there were many two stroke piston ported motorcycle engines, but I'd guess mowers, chain saws, string trimmers outnumber other two strokes today.

But then, I don't have any numbers to back up my own opinion either!!

Anyone have any numbers on this question?

Offline slawsonb

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Re: Test Your 2-Stroke Knowledge...
« Reply #8 on: January 27, 2017, 08:53:35 PM »
I suspect you are correct, and I had a little skepticism about some of the answers as well, but it is what it is...
...bert

Offline BS Mechanic

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Re: Test Your 2-Stroke Knowledge...
« Reply #9 on: January 27, 2017, 09:11:02 PM »
Yes, definitely interesting, makes you think a bit!

Offline BRT-GTR

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Re: Test Your 2-Stroke Knowledge...
« Reply #10 on: January 28, 2017, 07:16:19 AM »
     BS,.............. I took a chance on that question. US small 2S's obviously more advanced than UK. No reed valves on mine but then, they may be older, much older!! ;D
                          Give yourself a 1 for that.
                        Saw a 'Massive Engineering' programme recently. You can stand inside the crankcase or cylinder on the biggest 2S marine diesels. That would help with
                         inspecting the chrome on the bores  :o.   Seems bigger really is better when it comes to 2S engines !!
      Pup.............You're still our best source of BS information when we're head scratching.  8)                                                                    Brian.
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Offline OldSwartout

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Re: Test Your 2-Stroke Knowledge...
« Reply #11 on: January 28, 2017, 06:53:01 PM »
I've got 2 chain saws and at least 3 trimmers around and they're all piston ported, but then the newest is at least 10 years old, so that could easily have changed.
Karl Swartout
Mooresville, IN
BS175 Roadracer
BS350 GTR

Offline slawsonb

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Re: Test Your 2-Stroke Knowledge...
« Reply #12 on: January 28, 2017, 08:40:57 PM »
 I've gone totally battery powered for my trimmers and chain saw. Also have a plug-in chainsaw that is awesome and enough heavy gauge extension cord (with inverter on my diesel Ford P/U) to reach every tree on the place, so the 2S motor is outta favor in southern AZ, except for BS's...
...bert

Offline bert Lilley

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Re: Test Your 2-Stroke Knowledge...
« Reply #13 on: January 29, 2017, 01:11:27 PM »

Yup just scored 26 out of 30  Bummer

Offline husker

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Re: Test Your 2-Stroke Knowledge...
« Reply #14 on: January 31, 2017, 08:26:18 AM »
26 of 30. On a small premix 2 stroke doesn't the oil originate in the gas tank?
1968 Bridgestone GTR350,  1971 Kawasaki A7SS, 1983 KZ750 LTD

Offline hmmmnz

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Re: Test Your 2-Stroke Knowledge...
« Reply #15 on: February 25, 2017, 06:05:04 PM »
28/30 for me,
but i don't know old school ounces and gallons. so couldn't figure out the ratio, if it was mls per liter it wouldn't have been a problem. :D

also didn't know about big 2 Stroke Crosshead Engines,  so i learned something today
mini buffalo (chibi copy) 68' mkII 200

 


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