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My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset


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  #1  
Old 02-26-2017, 11:02:57 PM
JohnnyC JohnnyC is offline
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Default My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

I really did not know how to title this thread, but the title above no matter how you read it fits my problems I encountered today.

It has been MONTHS since I ran my 6.5NH on gasoline. Maybe 8 months. I usually fire it up on propane since it is easier.

Earlier today I fired up the 6.5NH on propane to test a transfer switch. The gas safety solenoid valve nearly caught fire and was burning up. If I had not caught it, the valve may have been compromised by heat, sparks, and possibly fire causing an explosion of highly volatile propane gas. You may have read the story already in the thread below:

https://www.smokstak.com/forum/showthread.php?t=166527

Afterwards I decided to fire up the 6.5NH on gasoline. As mentioned it has been a long time since I ran on gasoline. The 6.5NH fired up, but ran like crap. Gasoline was dumping into the carburetor like me taking a piss after drinking a 6 pack. I was not happy since the carburetor was totally disassembled and completely cleaned out last Spring and ran like a Champ afterwards.

I knew something was wrong and the carburetor needed to be disassembled which I did. For one thing, the gas in the carburetor smelled a little funky, but I was surprised as to what I found at the bottom of the float bowl. There were little black flakes of something in the bowl (both sides) as seen in the first two pictures below. I have absolutely no clue what these black flake are, but without doubt they got into the small passageways in the carburetor plugging them up. For now, I cleaned out the carburetor and blew out all the passages with compressed air. I will reassemble the carburetor tomorrow after I go over it again. The third picture shows a clean float bowl bottom.

I always run a filter inline and the fuel pump has a new filter screen (less than a year old). I checked the line filter since it is see through plastic. It is clean, not a spec of anything. Where did these black flakes come from?

*** Sooooooooo, can I assume my 6.5NH hates me since it failed using 2 different fuel sources?????? Or should we say it is always good to have a backup generator for cases I ran into today? Or maybe both?

JohnnyC
New Jersey
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Last edited by JohnnyC; 02-26-2017 at 11:22:57 PM.
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Old 02-26-2017, 11:26:25 PM
scoops scoops is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

hmm.. fuel line degrading?
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Old 02-26-2017, 11:33:21 PM
oregonfarmboy oregonfarmboy is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

That would be my guess as well scoops. Looks like fuel component breakdown due to ethanol fuel.
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Old 02-26-2017, 11:37:30 PM
JohnnyC JohnnyC is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

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Originally Posted by scoops View Post
hmm.. fuel line degrading?
I was thinking the same, but between the inline fuel filter and the pump there is only about 6 inches of rubber line and the facet fuel pump has a 74 micron screen in the bottom of it. What hat means is either the fuel pump after the screen or the metal fuel line between the pump and carburetor is flaking. The black stuff does not appear to be metallic. Something in th epump degrading???

JohnnyC
New Jersey
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Old 02-26-2017, 11:44:30 PM
Vanman Vanman is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

I've learned that it's best to have zero rubber line After the filter. The rubber sheds those little black carburetor - clogging pieces of $h!t that will have you pulling your hair out!

I hope the source is not internal rubber parts from your fuel pump!
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Old 02-27-2017, 12:12:26 AM
JohnnyC JohnnyC is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

That's why I tried to get the inline filter as close as possible to the fuel pump, regardless the screen filter in the pump should have caught this.

After my last posting I may have an idea where the source of the black flakey crap may have come from..... It may be the float!! The float is made form a black hard-foam material. I am in the house and it is in the garage so I don't have a picture. I wonder if today's ethanol crap gas is attacking the floats on each side of the bowl.........

JohnnyC
New Jersey
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Old 03-05-2017, 09:02:03 PM
JohnnyC JohnnyC is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

Since my last posting I completely cleaned the carburetor of the mysterious small black flakes seen in my previous pictures. Upon the initial start up the 6.5NH ran great on gasoline. About 25 minutes into a hard run it started choking again and I seen lots of raw fuel dumping down inside the carburetor. This was 2 days ago... I figured what ever those flakes were, they were back again, but from where? My inline fuel filter was clean. I put the 6.5NH to bed.

Today I decided to further investigate the situation. About 5 minutes into running the 6.5NH it completely died. Upon further investigation I discovered that the fuel pump gave out. It no longer was pumping although it was making the click-click noise when energized.

I removed the fuel pump from the 6.5NH and opened it focusing on its internal filter screen as seen in the picture below. It was clean. No black flakes or anything. At this point I can only assume that the black flakes originated from inside the pump after the internal screen filter and that something internal to the pump broke up and ended up in the carburetor's float bowl. I did not open the carburetor to verify after this latest incident because it was getting late.

JohnnyC
New Jersey
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Old 03-05-2017, 09:46:41 PM
Vanman Vanman is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

So, do you think that the ethanol laced gasoline ruined the pump?
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Old 03-05-2017, 11:43:53 PM
JohnnyC JohnnyC is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

Quote:
Originally Posted by Vanman View Post
So, do you think that the ethanol laced gasoline ruined the pump?
I don't know and I don't know where the black flat flakes originally came from or what they were. If I have time tomorrow and energy maybe I will open up the carburetor and 1) see if there are more black flat flakes, 2) save a few to determine what they are made of. It has to be inside the pump or the steel line leading to the carburetor.

JohnnyC
New Jersey
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Old 03-06-2017, 12:46:06 AM
Vanman Vanman is offline
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Default Re: My 6.5NH Hates Me -or- It's Always Good To Have A Backup Genset

Might try taking all of the rubber parts out of the dead pump, stick them in a jar with ethanol laced crapoline, and see what happens to them over time...
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