Fuel Line Question |
Post Reply |
Author | ||
Mountain Man
Senior Member Joined: May-09-2014 Location: Brevard, NC Status: Offline Points: 124 |
Post Options
Thanks(0)
Posted: January-07-2015 at 1:39pm |
|
Re-building a PCM-351W engine for a Fish Nautique. Have made upgrades with GT-40 Heads and a Performer Intake. Question for those who have made these changes - what fuel line did you use from the mechanical fuel pump to the carburetor inlet to accommodate the overall change in intake height? Really only interested in USCG approved options. Thanks in advance!
|
||
hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
Post Options
Thanks(0)
|
|
The stock fuel line should fit the performer intake with just a slight bend.
|
||
Brian
|
||
phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
Post Options
Thanks(0)
|
|
Try to make the hard line work. If not, I have a soft USCGA option for you.
|
||
C-Bass
Platinum Member Joined: November-18-2008 Location: Columbus, IN Status: Offline Points: 1248 |
Post Options
Thanks(0)
|
|
Some have purchased pre-flared brake line (3/8" I think) from Napa and used a tube bender to make their own hard lines.
|
||
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
|
When I get back to Florida that's second on my list, it's 3/8 brake line you need and a 1/4 x 3/8 90 for the pump part # 6432T128 at Mc Master Care. A tube bender and flare tool is needed also. Or go with what Zach has if you don't have all the tools
|
||
phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
Post Options
Thanks(0)
|
|
Gary, the line is 3/8" but the end fitting is 5/8" Fyi.
|
||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Online Points: 21122 |
Post Options
Thanks(0)
|
|
That fitting may take a 5/8" wrench Zach, but I suspect that's not it's nominal size. More likely to be 3/8" just like the line. Kind of a moot point, as the line will come with both fittings you need.
Fuel pumps do not all use the same npt threads. My older ones are smaller (maybe 1/4" like yours Gary) but the newer ones are larger. Either way, he won't need a 90 adapter if he already has an original hard fuel line plumbed. I believe many auto parts stores will rent you the double flare tool for free. Possibly the bender as well, though they're not expensive to buy. Double flare tool is a little pricey though. |
||
phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
Post Options
Thanks(0)
|
|
Timmy, right off the soft fuel line packaging. Think about it, that fitting has to be larger than a 3/8" line to go around a 3/8" line.
|
||
8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
Post Options
Thanks(0)
|
|
To clarify, the inverted flare nut for 3/8" OD tubing is threaded with 5/8"-18 threads. Zach is correct but just didn't explain it very well!
|
||
phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
Post Options
Thanks(0)
|
|
Allllways carry a 5/8" wrench on trips and an adjustable for the big fitting haha.
|
||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Online Points: 21122 |
Post Options
Thanks(0)
|
|
Well I'll be darned. I don't know my inverted flare fittings by heart (obviously)... I thought about the only thing you could count on in any thread size convention is that the nominal size rarely matches the dimensional size, and it never matches the wrench size. Guess there's an exception!
Still extraneous info he doesn't need ;) |
||
phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6149 |
Post Options
Thanks(0)
|
|
Sureee until his fittings don't fit ;).
Speaking of which, if I go QF come spring I am going to work on a fitting from Earls performance here in town to turn the output down at a 45 to a 5/8" inverted flair so I can try to make a hard line fit. |
||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Online Points: 21122 |
Post Options
Thanks(0)
|
|
3/8 brake line will come with the proper fittings for a semi-modern Holley marine carb, hence the recommendation to use that. Smaller brake lines would be sufficient (conquerer used something smaller like 7/16" on their engines) but the fitting size wouldn't line up.
|
||
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
|
Thats great,if you have one thats one less thing I need to carry |
||
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
|
I just carried the extra Holley inlet I have to the store to match up and then looked at one of my pumps,didn't know there was more than one pump size,I hope the one down south is the same! It would be so much easier if we could use AN hose and fittings like I did here,but I have heard from the neighbors that the coast guard does check so I don't want to gamble. |
||
lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
Post Options
Thanks(0)
|
|
Need to have room in toolbox for misc items Gary ?? |
||
If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
||
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
|
Naw Mark now that we have a newer boat Chris doesn't mind being seen with me so I use his
|
||
baitkiller
Platinum Member Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
Post Options
Thanks(0)
|
|
You guys dont have a flare tool? Damn... I use mine at least once a decade. Indispensable.
|
||
Jesus was a bare-footer.............
|
||
8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
Post Options
Thanks(0)
|
|
John, Keep in mind the fuel lines are double flared. |
||
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |