[C320-list] Perkins running hot

[Rick Sulewski]

Try using a dingy step air pump or even a stiff but barely flexible
electrical wire or cord that you can feed into the seacock from the hull
side. You may have picked up some trash or even some weeds. I had  complete
blockages for several years in row due to picking up some weeds and even a
root ball from an aquatic plant that was firmly stuck in the  inlet on the
water side of the hull.  Since the blockages seem to occur in mid or late
summer, I got pretty good at I diving for the prop shaft while clutching a
line tied to the genoa winch.  It was easier to dive rather than to pull off
the hose and fiddle with the blockage from the dry side. After 2-3 dives I
could clear the blockage with a small knife. The first thing I did after
haul-out in the fifth year of ownership was to install a round mushroom top
type grill/strainer with small round holes over the engine freshwater inlet.
Not another blockage since....
Rick
My-Ria 95 320 hull #277 

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
Of JeffWillis111 at aol.com
Sent: Tuesday, August 12, 2014 8:53 PM
To: C320-List at Catalina320.com
Subject: [C320-list] Perkins running hot

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