Topic: 1957 Evinrude Fleetwin 7.5 HP (Update)Impeller Question) – Page 2

This topic has 20 replies, 9 voices, and was last updated 7 years ago by cesarp35.

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March 29, 2018 at 7:46 pm #73209
cesarp35
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quote 1957evinrude:

quote crosbyman:

https://www.youtube.com/watch?v=SVOedhzPP7M

somewhat ..easy job

https://www.youtube.com/watch?v=tA0u62hciwY

https://www.youtube.com/watch?v=pX1u6rtUE1M

I have watched his videos several times. I’m not much of a mechanic but trust me its not a bad job at all to take apart the l/u and pull the powerhead. Just be sure and replace the o ring and seal under the power head and the base gasket

Got it, Thanks!!
March 30, 2018 at 3:23 am #73233
crosbyman
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Canada Member
see pics

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March 30, 2018 at 7:39 am #73236
cesarp35
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quote crosbyman:

see pics

Very helpful, thanks Bud!!!!!
May 8, 2018 at 6:04 pm #75573
cesarp35
Participant
(Update) Well i finally got around to changing the impeller and after taking of lower unit to my surprise it had a smaller impeller compared to the one that i ordered base on my model#, after doing some research someone along the line seems to have upgraded the water pump to what looks like a water pump from a 1979 6 hp witch takes the smaller impeller and has a cup in the water pump housing. So after ordering the correct impeller and installed i notice there really wasn’t much improvement of the water amount coming out the spout, can the upgraded water pump be the problem as it is not the original to this motor? water does come out but only like whats on the video i posted.
May 8, 2018 at 7:00 pm #75574
crosbyman
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Canada Member
if you send water directly up the water pipe going into the powerhead does it look like the flow is restricted

or… try pushing som air pressure up the water pipe can you sense that the air is not free flowing and pressure is building up

if you take the powerr head off can you try sending air pressure backwards in case some passages got plug up with impeller rubber chips

etc….

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May 8, 2018 at 7:11 pm #75576
cesarp35
Participant
Yeah i blew air with a pressure nozzle through the water pipe from top of power head and from below, the impeller that i took of was intact just had a few cracks in a couple veins so i’m pretty sure there’s nothing obstructing the water flow
May 8, 2018 at 7:32 pm #75578
Mumbles
Participant
It sounds like your motor has been upgraded with the 763758 water pump kit which will pump water just as good as the original did. Just make sure the gasket goes between the housing and the wear plate, not underneath the plate as I’ve seen done countless times.

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May 8, 2018 at 7:46 pm #75580
cesarp35
Participant
Yeah Mumbles that’s the one it was upgraded to, i did make sure i installed the gasket correctly. I should have paid more attention to the water pipe when i blew air through it to see if there was any restriction
May 8, 2018 at 10:43 pm #75585
frankr
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US MEMBER PAY BY CHECK
Are you worried about the water coming out as shown in your original post? I don’t know what you are expecting, but that thing is doing just fine.
May 8, 2018 at 11:19 pm #75590
fleetwin
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US Member
Yes, Frank is right, output on video looks fine…
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