Sticky Primer

Sticky Primer

The primer on our 172E has recently become difficult to pull out and push in.  It fills with fuel OK.  Can it be lubed -or- does it need new o-rings?  Any suggestions?

Thanks.

Al

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Re: Sticky Primer

Al Gilson wrote:
> The primer on our 172E has recently become difficult to pull
> out and push in.  It fills with fuel OK.  Can it be lubed -or-
> does it need new o-rings?  Any suggestions?

Hmmm - I had an old girlfriend like that smile
OK,OK,OK - she's a 172H - Whew . . . . .

Pull primer out
Squirt with WD-40
Pull in and out a couple of times
Repeat every few months or write memo,
I must fly more often smile

HTH

Tony
C-GICE

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Re: Sticky Primer

Make sure the primer shaft is not bent.  I saw this happen to a rental Skyhawk.

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Re: Sticky Primer

I have tried the lub and new packing thing on the last two problem primers.. My opinion now - Won't last, problem will return... Replace it now with a new one and save the hassle.

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Re: Sticky Primer

what is the big hassle of unscrewing the thing and changing two o-rings.  changing the whole primer is a bitch

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Re: Sticky Primer

kayakook,  that is exactly what I do when ours get stiff.  Install 2 new o-rings (fuel type) and will usually last for about 8 months.  In a pinch I spray with silicone but is only a temporary fix.  A new primer I would be afraid to ask price.  cheers!

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Re: Sticky Primer

I install new O-Rings when mine stops priming.
When it gets sticky I give it one shot WD-40.
total time - 5 seconds.
Life of fix - several months
Repeat - every few months as needed.

This fix costs nothing.
Installing new O-rings legally requires that the work be performed by a certified A & E Tech. Where I live they charge $200.00 to say Good Morning"

Tony

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Re: Sticky Primer

Try using DC-4 on the 0-rings. It works great, better than WD40 and is made to lubricate 0-rings.

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Re: Sticky Primer

Pull out the shaft and lube the o-rings with DC-4 (Dow Corning). I dont think that WD-40 is the right answer it will attract dirt and dry up quickly.

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Re: Sticky Primer

DC-4 will work fine.  Use conservatively since DC-4 does not dissove in fuel.

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