still more 2.4 merc questions

[bullet19]

Hello

Been searching the forums.....Here are some questions I cant find definative answers to... :confused:
1. does a 2.4 175 have the same porting as a 200?? I blew my 200, and have a 1985 175 block (been running with a horz front half-I think 175's had vert reeds)
2. can I d-port my pistons with a grinder?? Enlarge the FP holes with drill bits?? The results wont be perfectly smooth, especially the fingerport holes.
btw....my ports are 1.610-20 from the deck as measured with slip fit with a caliper...
Thanks for all the help
Special thanks to T-Rex...BTW I had read and saved the Cherry 2fo article for reference
Bryan :)

[sosmerc]

if the replacement bare crankcase part numbers are the same, then the porting will be the same. But don't compare powerhead assembly numbers, because a different number might mean the powerheads have different cylinder heads or exhaust divider plates.
You can go to a site like dougrussell.com and compare part numbers rather quickly.
Hope this helps.

[sosmerc]

http://www.dougrussell.com/partscatalog/components/index.cfm?fuseaction=viewparts&colid=01&coldesc=V%2D175&index=555&block=120&BlockNumberList=10,90,100,110,60,150,160,120,170,350,130,20,80,70,210,270,290,250,230,280,300,220,26 0,240,30,310,360,420,320,380,330,410,400,340,140,390,370,180,190,50,0,200,40

So, for example, on this page the part numbers are different on the crankcase assemblies in this serial group so therefore they are not the same.
What I choose to look at was 175's starting at OC239553

[sosmerc]

Hard to swallow those prices for bare blocks, huh??? Powerhead assemblies are down at the bottom of the parts list...they are even worse!!

[150aintenuff]

new 200xr6 is cheaper....... damn.... 10k for a powerhead... might as well buy a new motor with the extended warranty...200 L $10,600 straight from merc...