Johnson 175 Fresh Water Flush Port

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hi,<br />I am new to the forum and i have 2 175 johnson and used to flush them using the cups kit, but i have Q about the fresh water flush port, which is best to flush the cooling system "cups or flush port"? And can i run the engine while using the flush port?<br />Thanks all.<br />Sam <br /><br />Flush port

 

[JB]

Re: Johnson 175 Fresh Water Flush Port

Ahoy, Johnsons.<br /><br />The flush port is for flushing the engine without starting it.<br /><br />If you run the engine while using the flush port you risk serious damage to your water pump, which would be running dry.<br /><br />The most thorough flush, like when preparing for winter, is done with the muffs on and the engine running.<br /><br />Good luck.

 

[seahorse5]

Re: Johnson 175 Fresh Water Flush Port

JB,<br /><br />Using the flush port on the back of the newer Johnson and Evinrudes, you can choose to run or not run them, just don't exceed a fast idle. This is the factory recommendation because the port is a direct connection to the water line from the pump to the block.<br /><br />Yamaha, on the other hand, uses a line with a garden-hose fitting, says not enough water will flow thru the small diameter hose to lubricate the water pump impeller blades and cool the motor.

 

[plus+]

Re: Johnson 175 Fresh Water Flush Port

thanks all for the help..

 

[seahorse5]

Re: Johnson 175 Fresh Water Flush Port

Using a flush muff, or cups as you call them, is the best way to run and flush a motor.