OMC cobra overheating after changing water pump fix
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- čas přidán 29. 03. 2020
- Demonstration video showing what causes overheating after new water pump/impeller replacement OR if the motor runs fine on muffs but not on water.
3 Large orings, upper 2 are oil, lower one is the water leak area. Clean really well, apply permatex aviation or perfect seal and new gasket. Make sure mating surfaces are clean, flat and gasket seats well. Good time to do seals too but this focuses on the water issue.
Marine Parts Online store (use search top right): amzn.to/46jXJWQ
Great video
Thank you
O my, i hope this is my issue. I am going on a week of wrenching, had he back end split once and off 3x now...lol..1 trip to the dock which was a 10 min fail. Still over heating.. Its fine on muffs..lol i did see i may have a impeller issue. It was new but seems to have melted a bit and the metal cage spun?
ps_ i am the 2nd guy taking a stab at fixing this overheating issue 5.0 ho 93 fourwinns
I think is the exact issue I'm having
What is the part with the o ring called
Where would I find that lower o-ring? Special to OMC or something I can find at an auto parts store/hardware store?
more of a rare oring - an oring shop could spec is but def not autoparts stores, they would just have generic stuff-
What if the lower unit is new an you replaced the impeller an it's still not priming at an idle? Also the water pump shaft is spinning as well ?
Did you ever figure this issue out? I'm having the exact same problem
I'm going to tear into my drive this weekend and hopefully this is my issue
dont forget to test the drive in standing water - NOT muffs. Muffs will prime the pump and give a false positive. Tape the top 3 water inlet grates and a tote will work great, keep the water full. Good luck! Also - the gasket should be replaced when doing the orings (kinda obvious but you know)
Do I need to remove outdrive from boat to check this?
Yes you do
Does anyone have a part number for the o-rings? Just trying to see if I can order them or if I need to get them made.
Took some digging but here you go: GLM 83250, Sierra 18-7138; OMC OEM Part Number: 318717. 3 required.
@@SocalMarineUSA thank you so much!
I replaced my water and thermostat new seals and it’s overheating maybe this is the main problem.
Did you solve it?