1995 GT-40 Fuel Pump/FCC conversion

Paul, Gun Driver did.  He is still very active on this forum.

Wonder if you got the replacement for the original pump if that would solve your problem- http://www.highflowfuel.com/qfs-oem-replacement-marine-outboard-electric-fuel-pump-for-pcm-350-5-6l-1984-2021-replaces-52365517/

Why keep a flawed system when the FCC was made to correct the problem?

My 95 is an early 95 so it has the LPP and HPP and does not use an FCC.  Not one time ever has it heated the fuel and caused any fuel vapor lock so the PCM system will work with the by pass line from the fuel pressure regulator line to the High Pressure pump and you can replace the HPP in the 95 for less than $100 and they are readily available.  Why switch to an FCC for $700 and then add a return line to the tank?   In my world if you can make it function like new, don't reinvent it, just fix it.  Since the aftermarket pumps only offer 1 inlet and 1 outlet he would need to add a T before the High Pressure pump that could handle 40 PSI for the return fuel from the pressure regulator.  The factory used Stainless Braid wrapped fuel lines with bolted connections on this return line so I would copy what they did.  As I recall when this all was first discussed back in 2016 we had no idea why they ran that return line to the HPP but now it seems necessary to avoid vapor lock issues.   Several companies would make a pump that would work for this application,  Carter, Airtex, Denso, Bosch, Walbro all sell a pump that could be adapted, just choose the one that makes at least 50 PSI and you are good.   If it makes 75 PSI that is fine, your pressure regulator will keep your pressure at the PCM chosen pressure, the pump can make more and be OK but it can't make less pressure.

It's too bad that PCM didn't recommend their own part because it works really well. The Fuel Control Cell or FCC contains a bath of fuel for the pump that keeps it cool (along with a return line to the tank). It also helps with pump cavitation or starvation when the boat is getting tossed around. It also comes with the fuel lines that you need, although I'm not positive about the Sport. 

Ha Ha Paul. Actually had a big storm roll through at 11ish last night. Power kept going on and off so I shutoff the main breaker since we have had major problems in the past with it crossing phases and disrupting electronics. I had just got up to see if power was back on and flip on the main again. Checked here and went back to sleep. I assure you I then did not get up til 9, by then I miss the good stuff....

GSS350G3 will work as well. Like Alfadon says you need the correct inlet to attach the fuel filter which those others do not have. Walbro will not be able to match PCM's number imprinted on the pump or if they can they will not tell you the specks of it. Been through this with them before. Be careful there are fake Walbro pumps out there ,Google fake Walbro pumps there are ways to identify if they are real or not. Automotive forums say they are interchangeable because they use a different type fuel filter than PCM'S FCC. You need to attach the filter inside the fcc the way pcm designed it unless your willing to chance not using a filter. If your worried don't be cheap get an oem pump from Nautique parts.....

You want the one on the left with the round nose that fits in the bottom of the filter.  I searched Google and summit has a GSS341BX that looks correct but I don't know what the BX references. 

Walbro gss 340 or whatever has superseded it

I’ve been looking through all the FCC threads. My high pressure pump failed this morning. Does anybody know what the Carter part number is? My local auto parts store has some Carter pumps. I’d love to get this fixed them back on the lake this evening. And I am referring to the high-pressure pump in the FCC. I have a 1996 GT40 with fcc.

I found some other posts that suggest the Carter fuel pump part number P60962. Comparing pictures they look different.

That's perfect... I just ordered! I'll use both- the 2nd will serve as an actual jamnut on the first.

Thanks!

Look at the link and you'll find a 9/16-24 hex nut that should be just what you need

It's a 3/4 inch hex like your original

2 for 10.49 so you'll have a spare

I don't think I'd trust that compression fitting at all in that application.

I guess you could try a local gun shop too.

link

bigwavedave wrote: I have the high-pressure fuel pump Dave 815-953-1823

Wrong pump for an FCC

I think this (in the link) is what you have and the nut in the middle is what you need


Kinda pricey for just the nut or the whole kit, but maybe a call to Ski Dim would get you the nut specs or like I said take the old pieces with you.

Sorry about the confusion but I think this will help

link