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 20hp Honda bogs down under load. 
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New Member

Joined: Sat Oct 20, 2018 9:43 am
Posts: 1
Post 20hp Honda bogs down under load.
I have Gx620 on go devel frame. Motor runs good idles good when prop is out the water. Bogs down when I put in water. New carb, fuel pump, fuel filter, new hose. Looks to be getting food fire from both spark plugs. What all think?


Sat Oct 20, 2018 9:49 am
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MMT Pro Member

Joined: Thu Mar 05, 2015 8:56 pm
Posts: 91
Post Re: 20hp Honda bogs down under load.
Is it over propped?

I had a 25 Kohler, a stop nut came loose somewhere and when I went to give it full throttle it would activate the choke and bog it down.


Fri Oct 26, 2018 8:38 pm
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MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: 20hp Honda bogs down under load.
Check the oil. Those things don't like too much oil. Other than that, likely culprit is simple, and carb related.

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Mon Oct 29, 2018 9:10 pm
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MMT Pro Member

Joined: Sun Aug 27, 2017 6:24 am
Posts: 53
Post Re: 20hp Honda bogs down under load.
Try to keep the bulb primed by hand every few seconds to see if that helps. I replaced the fuel pump, carb, and filter on my gx clone but it starve itself out of fuel after idling for a minute or under load. I put a low pressure electric fuel pump on, that solved my issue

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Tue Oct 30, 2018 4:12 am
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