Also check the inside of the engine. I began having overheating problems a
couple of years ago (just once in a while). Chased everything through the
system and could not find a problem. Finally (after having done it before) I
took off the square headed 'bolt' which holds the forward zinc - doubting
myself because I had changed the zinc earlier this year. And pushed a rod
down through the input hose - out came a very old rust stained piece of an
impeller. Apparently it only created blockage once in a while!!!! I cannot
recall having an impeller damaged in any way in the 19 years I've been
changing them, so it may have been in there forever.
Suddenly, the engine is running cooler.
Gary
2QM15.
----- Original Message -----
From: "Rich Knowles" <r...@sailpower.ca>
To: <cnc-list@cnc-list.com>
Sent: Tuesday, October 22, 2013 3:51 PM
Subject: Re: Stus-List Part numbers for 3GMF seawater pump
There is a possibility that the rubber impeller has detached from the
metal drive insert and is spinning while the impeller either doesn't move
or only turns slowly. Check the Jabsco website for impellers.
Rich
On Oct 22, 2013, at 16:29, "Indigo" <ind...@thethomsons.us> wrote:
My impeller part number is Yanmar 124223-42092 and the gasket is Yanmar
124223-42110. I have never had to replace the cover or cam, so I don't
have
those part numbers.
Jonathan
Indigo 35 III (with 3GMF)
Not sure where you are located but Mike in the parts department at Rex
Marine in Norwalk CT could not be more helpful.
-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bill
Connon
Sent: Tuesday, October 22, 2013 2:48 PM
To: cnc-list@cnc-list.com
Subject: Stus-List Part numbers for 3GMF seawater pump
Group,
On haulout this year I noticed water drops from the seawater pump. I
changed the bearings and seal and afterwards the pump would no longer
self prime. I changed the impeller and was able to pump water using a
600 RPM half inch drill but the boat motor would not self prime and pump
anti-freeze through the system.
I want to buy a new cover, gasket and cam but can't come up with the
proper part numbers. A call to the nearest Yanmar dealer did not help
but I assume that it is a Johnson pump ( from what I found on the web )
and it was using a Johnson 827 impeller.
The motor is a 3GMF from 1985and the impeller is 2" OD x 7/8" wide and
has a 1/2" bore with a keyway.
All help with getting the proper part numbers would be appreciated.
Bill
Caprice 1
1978 C&C 36
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