[C320-list] Perkins running hot

[JeffWillis111 at aol.com]

Hello All,
 
Yesterday the trusty Perkins began to run a little hot motoring out so I  
returned to the dock.  Actually about 30 degrees hotter than  normal.  I 
started at the raw water strainer to make sure in was clear  and noticed the 
flow into strainer was very slow.  So I removed hose from  Marelon seacock and 
checked flow coming from here.  Barely enough to  half fill hose, I was 
expecting a much greater flow than this because 2 months  ago I repacked my 
stuffing box at the dock and the rate of flow coming here was  much greater.  
 
The Marelon  seacock on hull 174 has a right angle fitting on top  above 
shut off handle held in place by 4 screws. Newer seacocks online dont  appear 
to have these 4 screws.  
 
My question is can I remove theses screws to remove the right angle fitting 
 to gain better access to ball valve?   I could not really get anything  to 
push thru the right angle fitting to try and clear a possible  obstruction. 
  Visiblity was about 2 ft underwater here in Punta  Gorda, FLA, Charlotte 
Harbor so diving was not successful.  I hooked up a  hose to the exhaust 
side of my small shop vac and blew air backwards thru the  seacock and thought 
I may have cleared some algae (diver coming Thursday to  clean bottom).  
 
Hooked everything back up and tried again and still runnning  hot.   There 
are a lot of bubbles in strainer bowl when engine is  running.  I never 
noticed this before.  Is this normal?
 
thanks,
 
Jeff Willis
ESPRIT #174