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TOPIC: Doesn't pump good at idle

Doesn't pump good at idle 5 years 4 months ago #68213

  • elgindave
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Above idle she pumps great. Glad the light and warning horn works,
If we get hot we just fire up the Minn Kota trolling motor until the Bearcat cools down. I got it down to a science. :laugh:
If I get into some weeds it will get hot too! Nature of the beast.

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Re: Doesn't pump good at idle 5 years 4 months ago #68258

  • billr
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Dave,
Have you descaled the block?
I have a blue block F on my power cat, it wasn't pumping good at idle either. Removed starter, port water jacket cover, found scaled piled up restricting water flow. Removed the scale (I use a wet/dry vacuum), then used a small pick and screwdriver to remove any loose scale, reinstalled jacket cover. Pumps fantastic now at idle even on hose.

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Re: Doesn't pump good at idle 5 years 4 months ago #68339

  • 4stroke
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I'd agree with Bill, for as much as mine idle, the two F block engines have never been overheated.

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Dick Johnson

1989 16ft Sylvan

'57 Evinrude 18 (finally found a decent one)
'58 Johnson 5.5
'72 Johnson 6.0
'61 Homelite
'64 Johnson 18
'65 Homelite 55
'66 Homelite 55
'68 Bearcat 55 (3)
'70 Bearcat 55 (2)
'71 Bearcat 85 (Sold)

Re:Doesn't pump good at idle 5 years 4 months ago #68341

  • elgindave
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Thanks for the tip. I'll do that when I pull her out for winter. B)

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