67 Merc 950 ss tell tale not peeing on flush attachment

retrorocket

Cadet
Joined
Mar 8, 2006
Messages
8
I have had the motor for 2 years. As far as I can tell, there was little to no maintenance done by previous owners.<br /><br />I have just rebuilt my carbs, rejetted (I live at 5,000 feet and frequently boat at 9,000), and replaced the water pump impeller. We checked compression, and have 100-105 in every cylinder.<br /><br />The old impeller looked fine. There was a lot of sand in the lower unit, but I doubt it had been opened for a LONG time.<br /><br />I have not taken the boat out on the water yet. After getting the motor running with the flush attachment on I noticed I am not seeing the tell tale. Water and exhaust exit through the prop hub. I remember the tell tale working on the water in the past. I did some reading here, and it looks like there is no tstat for the older motors. My garden hose pressure is very high - over 50. I also read something that seemed to say that with high hose pressure the pump doesnt need to work hard, so there might not be a tell tale. Should I see the tell tale using the flush attachment? Do I have a problem? Should I try it on the water? Maybe try it with the hose faucet turned down?<br /><br />Also, is it easy to add a water pressure gauge to this motor? What about a temperature warning?<br /><br />Thanks for your help!<br />Randy in Denver.
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: 67 Merc 950 ss tell tale not peeing on flush attachment

Sound like the telltale is plugged try to rod it out with wire or blow it out with air
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: 67 Merc 950 ss tell tale not peeing on flush attachment

us heavy weedeater string and ream out the telltale.
 
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