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Andy Brown

OPS 45 Crank inspection

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The balance on the crank seems good.

So far I have run nearly a gallon through the OPS 45.

  The engine is bolted to the mount with aluminum 6-32 screws. Have not had one break.

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Did they upgrade the brass flywheel collet to steel?  

IIRC the brass one would mush out causing the flywheel to loosen which in turn made a mess...:(

Edited by Terry Keeley

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David Bryant has a wealth of information on the Picco and ops differences,David and I discussed about this some time ago,David gave me Alot of info about the two engines but I will let him chime in ,I have a pic of cranks David sent for starters,

msg-11795-0-08789700-1522211065.jpg

msg-11795-0-19565300-1524801265.jpg

msg-11795-0-63679200-1524801256.jpg

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Yes, the new "2017" OPS .45 Marine crankcase is based on the "2011" Picco P45R crankcase mold, modified internally with updated components

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_01.jpg

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_04.jpg

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_08.jpg

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_11.jpg

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_15.jpg

Picco_Compare-P45RtoOPS45_Crankcase_Nov2018_17.jpg

Edited by David Bryant

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On 11/8/2018 at 11:48 AM, Terry Keeley said:

Did they upgrade the brass flywheel collet to steel?  

IIRC the brass one would mush out causing the flywheel to loosen which in turn made a mess...:(

Terry,  The flywheel collet is still brass, but is much larger than the Picco collet. I now have about 1.5 gallons through the OPS 45 and the face of the collet that fits against the bearing shows no wear.

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2 minutes ago, Andy Brown said:

Terry,  The flywheel collet is still brass, but is much larger than the Picco collet. I now have about 1.5 gallons through the OPS 45 and the face of the collet that fits against the bearing shows no wear.

Ya, the Picco collet was way too small, still I remember the brass collet on the OPS mushrooming over time.

Just a suggestion but you might want to ask them to make them out of some kind of steel for future runs, would be a definite upgrade with little extra cost on their end. :)

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4 minutes ago, Terry Keeley said:

Ya, the Picco collet was way too small, still I remember the brass collet on the OPS mushrooming over time.

Just a suggestion but you might want to ask them to make them out of some kind of steel for future runs, would be a definite upgrade with little extra cost on their end. :)

The old OPS crank was 7mm. The new larger 8mm crank may be a help.  We will see in time.

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