86 pcm 351 fuel leak

Many thanks!

I have a 1990 with a Holly that has the same issue. What is "Skidim" though? Anyone have a url for them?

Mojo wrote: Funny I'm reading this thread, thinking of a gas leak I have on my Holley. The leak, strangely enough, looks like it's coming from the top of the carb where that 1/2" round embossed, button area is on top of the same secondary is you are mentioning.... I didn't look further into it when putting the boat up for storage, but maybe you guys have seen this and could remedy it... Thanks Moj'

I had the same thing happen in that spot. I added some JB weld and it sealed it up just fine. Short of replacing the fuel bowl, theres probably not much else you can do.

Hold the fitting in the carb and loosen the fuel line, tighten the fitting and then tighten the fuel line. That will usually fix this leak, unless the gasket is bad of course.

Thanks everyone for the replies. I have a Holly carb, I went to Skidim and there is a washer. I will splurge and spend the $1.06 to have it in "inventory" just in case a simple turn of the wrench doesn't fix the problem.

One more question - how messy is the process to replace the Fram water separating fuel filter? I had an 82SN2001 before buying the 86 and had to remove the entire filter body from the bracket to get the filter canister out. I don't think the filter had been changed for about 10 years! Any advice on this would be appreciated as well.

Don't know what carb you've got but some advice that was given to me - the Holley 600 Vacuum Secondary (model 4160) has a finer thread on the fuel inlet than many of the other models and is apparently easy to strip so be very careful tightening it to stop a leak. Also, if you are ever replacing those fittings (I've got nice dragster anodised ones - doesn't go any faster) some speed shops a$$ume you've got a "serious" one like a 750 double pumper and sell you the wrong fitting (happened to me twice). Some will even tell you that it's definately the correct one. If that happens just tell them you changed your mind and now want the fitting for a Barry Grant carb, which is the same.

it should be a nylon washer, if it has one, typical of a q-jet or edlebrock carb do have them but I don't believe holley uses it.

I have a minor leak on my 86 SN 2001 with a PCM 351. I know this is easily fixable just need to know if I need parts. The leak is coming from the fitting that connects the rigid fuel line to the carb - is there an o-ring or filter in this connection or do I just need to tighten down the connection.

I noticed this when I was winterizing and want to fix before spring!