| Author |
Message |
    
Alan Fisher
Member
Username: pilot481
Post Number: 6
Registered: 07-2009
| | Posted on Monday, July 20, 2009 - 12:59 am: | 
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I need to convert the old style pressure tank to the modern kind. Space dictates the need.
I just need to know where to connect the pluse line at the engine. The rest is not a problem. Just where the hose goes, in the simplist of terms please....Thanks in advance!!!. |
Joe Reeves
Senior Member
Username: joereeves
Post Number: 7701
Registered: 02-2001
| | Posted on Monday, July 20, 2009 - 08:55 am: |
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Those two nipple should be marked "fuel" and "air" or "in" and "out" (I forget which). Connect to "fuel" or "out". |
Alan Fisher
Member
Username: pilot481
Post Number: 7
Registered: 07-2009
| | Posted on Monday, July 20, 2009 - 11:09 am: |
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Lets put this another way, in order to operate the fuel pump, I need the pulse source from the engine to operate the pump. Where does that hose connect to the engine to operate the fuel pump or can I use the current pressure line? I did this on an ultralight airplane I built a few yrs back but darned If my feeble brain can recall how I did it. |
Joe Reeves
Senior Member
Username: joereeves
Post Number: 7703
Registered: 02-2001
| | Posted on Monday, July 20, 2009 - 11:16 am: |
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Sorry, I apparently misread your question. What engine are you speaking of (make, year, hp)? |
Alan Fisher
Member
Username: pilot481
Post Number: 8
Registered: 07-2009
| | Posted on Tuesday, July 21, 2009 - 10:03 am: |
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been looking for a post that explained the conversion from a old pressure fuel tank to a new type tank. I saw it once a while ago but didnt think I was going to need to that, but times change, Im working on a 58 18hp johnson. If you remember where that post is or know where the vacuum source comes from to power a new mikuni fuel pump please let me know...... |
Mike Cox
Member
Username: mixin
Post Number: 15
Registered: 06-2009
| | Posted on Tuesday, July 21, 2009 - 12:10 pm: |
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The 18hp was later produced with a factory fitted FP. Therefore, the easiest way is to to find a used transfer port cover that will provide a location to hook up a FP to. If the transfer port cover wants an OMC FP directly mounted, you may need to modify it to accept a nipple. My motor is a 10hp so the factory FP mounts to the transfer port cover, your 18 could be a remote mount - which would be preferable to install a Minkuni.
If this route is not feasable for you, then you can pull the intake manifold, remove the diaphram check valves etc and hook your vacuum pulse line to the intake manifold port that the air portion fo the 2-line fuel line was hooked to (under and behind carb on my 10hp). This was the way my motor was done before I bought it.
Check the link below for a wealth of info on the subject. I am reading his book right now "Cheap Power"- I would highly recommend it for owners of motors like yours!
http://www.duckworksmagazine.com/05/columns/max/5/index.cfm |
Joe Reeves
Senior Member
Username: joereeves
Post Number: 7712
Registered: 02-2001
| | Posted on Tuesday, July 21, 2009 - 12:29 pm: |
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They say a picture is worth a thousand words....
 |
jwbmarine
Senior Member
Username: jwbmarine
Post Number: 4710
Registered: 11-2005
| | Posted on Tuesday, July 21, 2009 - 12:45 pm: |
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http://forums.iboats.com/showthread.php?t=205628 |
Mike Cox
Member
Username: mixin
Post Number: 16
Registered: 06-2009
| | Posted on Tuesday, July 21, 2009 - 01:34 pm: |
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Joe - Thanks for the visual support to my long-winded (hopefully factually correct) reply!
jw - great link, it shows many of the different ways to "skin the cat". Too bad iboats is too slow to load for me lately.
Alan, goto jw's link and look at reply #15, that could be the easiest way to install a Minkuni. Good Luck! |
Alan Fisher
Member
Username: pilot481
Post Number: 9
Registered: 07-2009
| | Posted on Tuesday, July 21, 2009 - 09:44 pm: |
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Thats what I was lookin for!!! Will look for the parts to modify my engine, If I cant find them soon Ill do the flapper valve removal.
Thanks!!!! |
brad
Member
Username: seashark
Post Number: 6
Registered: 07-2009
| | Posted on Tuesday, July 21, 2009 - 10:56 pm: |
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Here is another link with picture a how to convert 2 line tank to single line
www.duckworksmagazine.com/02/.../max/.../wawrzyniak.htm |
