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Mechanical Question - 50hp Evinrude #2790878
04/22/19 12:48 PM
04/22/19 12:48 PM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL

May have a chance to get a 1754 aluminum boat super cheap, due to a mechanical issue that the current owner doesn't want to fool with. It's got an older 50 horse Evinrude (similar to the one pictured below). Motor set up for several years before he decided to start using it again. It runs great on a hose in the driveway, revs fine, pumps water well, etc. But, on the lake when it's under a load, it just bogs down and doesn't have any "oomph".

What are the most likely culprits? or is there just not enough info? Also, what kind of reputation do these motors have, in general?

[Linked Image]

Last edited by GomerPyle; 04/22/19 12:52 PM.

There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft
Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2790897
04/22/19 01:25 PM
04/22/19 01:25 PM
Joined: Oct 2014
Posts: 3,986
Guntersville
K
klay Offline
10 point
klay  Offline
10 point
K
Joined: Oct 2014
Posts: 3,986
Guntersville
Great motors. Carbs gummed up. Almost guarantee that's the problem. Do a compression check. You can rent the gauge from a parts store. Take out the spark plugs. Screw it in and turn over. Do on both cylinders. As long as they are close, you're good. I think that motor will have around 120. May be around 150.

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2790904
04/22/19 01:34 PM
04/22/19 01:34 PM
Joined: Nov 2015
Posts: 264
Decatur, Al
znrichie Offline
4 point
znrichie  Offline
4 point
Joined: Nov 2015
Posts: 264
Decatur, Al
My 40 Johnson would run great on a hose, but under a load it bogged every time. Ended up changing the powerpack and it ran great.


May not have killed anything, but always a good time
Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2790977
04/22/19 03:33 PM
04/22/19 03:33 PM
Joined: Jan 2002
Posts: 10,484
Bham
D
Dallas County Offline
Booner
Dallas County  Offline
Booner
D
Joined: Jan 2002
Posts: 10,484
Bham
Jets are clogged up or the fuel hose is clogged/restricted.


not sure what the best way to handle them is but they shouldnt be on tv and gettn married and raisin kids

Re: Mechanical Question - 50hp Evinrude [Re: Dallas County] #2791053
04/22/19 05:15 PM
04/22/19 05:15 PM
Joined: Oct 2008
Posts: 6,717
Selma
odocoileus Offline
14 point
odocoileus  Offline
14 point
Joined: Oct 2008
Posts: 6,717
Selma
Originally Posted by Dallas County
Jets are clogged up or the fuel hose is clogged/restricted.


Yep my first step would be to replace all fuel line/pump and rebuild the carb,

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791104
04/22/19 06:01 PM
04/22/19 06:01 PM
Joined: Jan 2017
Posts: 3,182
Chilton
P
Powpow65 Offline
10 point
Powpow65  Offline
10 point
P
Joined: Jan 2017
Posts: 3,182
Chilton
Anytime a motor sits for an extended period of time you can count on fuel issues.

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791154
04/22/19 07:01 PM
04/22/19 07:01 PM
Joined: Dec 2012
Posts: 15,952
Brierfield
Beadlescomb Offline
Old Mossy Horns
Beadlescomb  Offline
Old Mossy Horns
Joined: Dec 2012
Posts: 15,952
Brierfield
solid motor


We will burn that bridge when we get there
Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791241
04/22/19 08:47 PM
04/22/19 08:47 PM
Joined: Jul 2011
Posts: 39,377
Marshall County
FurFlyin Offline
Freak of Nature
FurFlyin  Offline
Freak of Nature
Joined: Jul 2011
Posts: 39,377
Marshall County
As already said above, rule out the fuel system first. Replace all the fuel lines, completely. New primer bulb too and not a Walmarks kind. Get an OEM primer bulb. Mercury seems to be the most common. Rebuild or buy a new fuel pump. Take the carb apart and clean it. See if you can find a manual to tell you the correct height to set the floats at while you're at it. New gaskets on your carbs too.

Save yourself lots of time and frustration, bite the bullet and get it over with. It won't cost much anyway.

I screwed around with my 115 yamaha for a year and couldn't get it to run right without quickly fouling the plugs. I finally bought rebuild kits for the carbs and haven't changed plugs since. I didn't buy fuel hoses for my motor, I made all of them from 3/8 Gates hose. Next time the carbs come off, I'm putting the OEM fuel lines on it. Too much trouble getting the hoses on. You probably just have one carb on that motor so it will likely be easier.

Even if it turns out to be something else, you're still going to need to replace and rebuild the fuel system. It will not be wasted money.


If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14
Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791303
04/22/19 09:47 PM
04/22/19 09:47 PM
Joined: Aug 2002
Posts: 22,635
Morgan Co.
Dixiepatriot Offline
Freak of Nature
Dixiepatriot  Offline
Freak of Nature
Joined: Aug 2002
Posts: 22,635
Morgan Co.
Try a new spark plug first.


http://familyfoundationfund.org
Proud descendant of confederate soldiers.
Auburn elitist
Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791396
04/23/19 05:51 AM
04/23/19 05:51 AM
Joined: Jun 2017
Posts: 6,247
Alabama
Jakethesnake Offline
The Flippin’ Idiot That Could Care Less
Jakethesnake  Offline
The Flippin’ Idiot That Could Care Less
Joined: Jun 2017
Posts: 6,247
Alabama
The best advice i can give is to send me the address to the boat before you buy it. So i can go buy it lol. If it has low compression then thats why he is selling it. Gonna cost more than its worth. But might be a simple fix. Take it to a shop if your not comfortable checking it. But compression check is easy. Make sure you know exactly what the compression is suppose to be though before you check it.

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791397
04/23/19 05:52 AM
04/23/19 05:52 AM
Joined: Jun 2017
Posts: 6,247
Alabama
Jakethesnake Offline
The Flippin’ Idiot That Could Care Less
Jakethesnake  Offline
The Flippin’ Idiot That Could Care Less
Joined: Jun 2017
Posts: 6,247
Alabama
And if you check it in front of him...then he might not sell it lol

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791400
04/23/19 05:55 AM
04/23/19 05:55 AM
Joined: Jun 2017
Posts: 6,247
Alabama
Jakethesnake Offline
The Flippin’ Idiot That Could Care Less
Jakethesnake  Offline
The Flippin’ Idiot That Could Care Less
Joined: Jun 2017
Posts: 6,247
Alabama
And a 80s evenrude is one of the best ever made to me. I had a 48hp that never needed a dollar for years. Sold it without touching it and it cranked everytime.

Re: Mechanical Question - 50hp Evinrude [Re: GomerPyle] #2791473
04/23/19 08:31 AM
04/23/19 08:31 AM
Joined: Feb 2015
Posts: 7,168
Meridianville
DryFire Offline
14 point
DryFire  Offline
14 point
Joined: Feb 2015
Posts: 7,168
Meridianville
Mine was powerpack, carbs, and collapsed fuel lines.

Re: Mechanical Question - 50hp Evinrude [Re: Jakethesnake] #2791486
04/23/19 08:42 AM
04/23/19 08:42 AM
Joined: Aug 2014
Posts: 19,982
Northport, AL
GomerPyle Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
GomerPyle  Offline OP
Impatient Stinky Britches Wearin’ Off-Roadin’ Guru
Joined: Aug 2014
Posts: 19,982
Northport, AL
Originally Posted by Jakethesnake
The best advice i can give is to send me the address to the boat before you buy it. So i can go buy it lol. If it has low compression then thats why he is selling it. Gonna cost more than its worth. But might be a simple fix. Take it to a shop if your not comfortable checking it. But compression check is easy. Make sure you know exactly what the compression is suppose to be though before you check it.


If I do buy it, it will be because I was able to get it cheap enough that even if I have to buy a motor, it's still a decent "deal". Basically buying the hull and trailer and the motor is just gravy. We'll see if it works out...


There are 3 certainties in an uncertain world:

1. All Politicians Are Liars
2. All Gun Laws Are an Infringement
3. Taxation Is Theft

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