Mechanical fuel pump problem

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May 21, 2017 | 08:57 PM

#31

ALBUQ F-1

Fleet Owner

Joined: Jul 2004

Posts: 27,299

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From: NM

Fairly easy to measure the movement of the pushrod. Eccentrics can go flat, but I'd bet in 90% of the cases, the problem is a poorly made offshore pump, as Pete found out.

May 21, 2017 | 11:08 PM

#32

yosemite98

Mountain Pass

Joined: Feb 2003

Posts: 236

Likes: 10

The gasket on manifold looks thin already... but i read in another post to use a rubber washer in the basket that goes over the rod, effectively making the rod longer. I think that's a good idea and might try it.

May 22, 2017 | 07:18 AM

#33

petemcl

Thread Starter

Logistics Pro

Joined: Nov 2011

Posts: 4,685

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From: Northville, MI

Quote:

Originally Posted by ALBUQ F-1

Fairly easy to measure the movement of the pushrod. Eccentrics can go flat, but I'd bet in 90% of the cases, the problem is a poorly made offshore pump, as Pete found out.

Purchased a couple years ago from Mac Auto. Less than 5 hours of use.

May 22, 2017 | 07:56 AM

#34

yosemite98

Mountain Pass

Joined: Feb 2003

Posts: 236

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Mine's from LMC truck. And when i activate it manually (it takes some pressure after initially easy push) it does have good suction.

Because this WAS the reason my dad thought the truck stopped running > 25 years ago I'm thinking something might have worn or broken just enough to not push that last little bit. I'll try the washer and if that doesn't work try and find an electric.