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Old 08-27-2017, 07:25 PM
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Default Water discharge? 1976 15R76A 15 hp Johnson.

Can anyone send me a picture of where cooling water discharges? I ran my engine for a short while, and did not see any water from anywhere. Thank you.
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Old 08-27-2017, 10:18 PM
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Join Date: May 2016
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On that model, the water shoots out the hole at the rear portion of the long exhaust housing... with the majority of it going out the exhaust through hub propeller. There is no water telltale outlet as per the later models.
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Old 08-28-2017, 06:38 AM
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Join Date: Aug 2017
Posts: 22

My guess is the schematic below is for your outboard.

In looking at the flow directional arrows (i.e. water circulating as the OMC designers intended) when the thermostat is closed all the pumped water exits the hose connected to the exhaust cover (i.e. the tell tale outlet). With the thermostat open, some of the water will exit the hose but some will exit through the prop.
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File Type: jpg Water Flow Scematic.jpg (88.2 KB, 2 views)

Last edited by brw0513; 08-28-2017 at 06:45 AM.
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Old 08-28-2017, 04:11 PM
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Default Thank you for the help.

Thank you.
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Old 09-06-2017, 07:47 AM
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Join Date: Aug 2017
Posts: 22

Hi Micahel 1.

I was way off the mark with my previous post above. Sorry

I've been doing more research on my 2001 15Hp Johnson and cam across this webpage that might interest you:

74 on water problems

The is a Section with the title No Overboard Water Indicator as we Know it, Not Used on Early Motors

It might be useful.
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