No water Flo...

Yooper91

Recruit
Joined
Jun 6, 2021
Messages
3
I have a 94 Mariner Magnum 40HP, serial 0G138021 with water flo issue
I replaced impeller with a complete kit, but still no flow out of motor.

At a loss of whats next to try... Any help is appreciated
 

hardwater fisherman

Lieutenant Commander
Joined
Mar 19, 2010
Messages
1,725
I have a 94 Mariner Magnum 40HP, serial 0G138021 with water flo issue
I replaced impeller with a complete kit, but still no flow out of motor.

At a loss of whats next to try... Any help is appreciated
How are you testing your water pump?
 

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Only by putting motor back together.
How else would you test it?

You can't test a water pump without water. And not on muffs. Use a large and deep barrel or back the boat down a ramp until the lower unit is deep under water.
 

Yooper91

Recruit
Joined
Jun 6, 2021
Messages
3
You can't test a water pump without water. And not on muffs. Use a large and deep barrel or back the boat down a ramp until the lower unit is deep under water.
I used muffs with the garden hose ..
Has always worked before when I run before each season
Not the correct way to test a new pump?
I did notice some water coming out of the exhaust by propeller
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
How old is the motor, was run in fresh or salt water ? Remove the thermo and check the internal housing condition, is it clean, rusted, salty ?

Happy Boating
 

mike_i

Master Chief Petty Officer
Joined
Jun 28, 2017
Messages
881
Did you have a water pump issue before you changed the pump?
 

hotrod53

Chief Petty Officer
Joined
Oct 16, 2009
Messages
508
I've had times where my motor wouldn't pump on muffs but would if submerged.

Before you panic, get yourself a piece of string trimmer string. Push it up in your pee hole and be sure mud dawbers haven't clogged your pee hole. Happens all the time.
 
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