| Author |
Message |
    
Bob Baker
Member
Username: bbaker
Post Number: 15
Registered: 04-2006
| | Posted on Wednesday, April 29, 2009 - 05:43 pm: | 
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After talking with my Honda dealer he said the Carbs on these Honda 4 Strokes have very tight passages, and if needed a rebuild could run in the $400 plus range. He said it was the only Carb class he's ever been too where they handed out small wire as you walked in the door...LOL
After reading a bunch on this site... I hear everything from make sure to use Sea Foam, gas treatments, to draining the carbs after every use.
My mechanic recomends the new Marine Sta-bil (blue) and Quikleen with every tank, due to the high water issues with ethanol. Does anyone have similar or different advice?
Also draining the carbs.... Ok to unhook fuel line and let engine run until it kills itself?
Would doing this harm the fuel pump?
Thanks,
Bob |
Rollie Rose
Advanced Member
Username: profisher
Post Number: 457
Registered: 12-2008
| | Posted on Friday, May 01, 2009 - 11:45 pm: |
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Bob, the most important thing is clean fuel reaching the carbs. Use a good quality spin on filter/water seperator or Racor type. These will keep foreign material out of the carbs. If you are using the engines regularily you don't need to drain the carbs. If it is going to sit for a few weeks then run them dry. I also installed stainless ball valves on each feul line at the spin on filter. I close them off at the end of the day so that fuel doesn't drain back from the engine. I want the carbs to remain full if I'm using the boat often. |
Bob Baker
Member
Username: bbaker
Post Number: 16
Registered: 04-2006
| | Posted on Saturday, May 02, 2009 - 01:56 am: |
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I have a spin on water fuel separator. Had a Mallory filter on when purchased and changed to a Mercury filter when winterized last Nov. (08)
Still had to flush carborater this spring. Not sure if the shop that winterized it actually drain the carbs.
Did you install the shut off valve above or below the filter?
Thanks, |
pilotart
Member
Username: pilotart
Post Number: 93
Registered: 03-2008
| | Posted on Saturday, May 02, 2009 - 06:02 pm: |
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I am running a Yamaha 90TLRP two-stroke as well as a Honda BF100 as a 'kicker' off one 10 micron Water Separating Fuel Filter.
To prevent the draw from engine running from ever draining the fuel from the not-running engine's fuel line,I have installed "Anti-Siphon" or spring/ball Check-Valves at each engines feed line at the filter.
(Brass Check-Valve is on left and other one is Aluminum on Brass elbow due to clearance.)
[img]http://i43.tinypic.com/2j9pc9.jpg[/img]
(just click the URL above to see a sharper photo)
Note that I have placed the Primer Bulb (only one) between Fuel Filter and Tank Supply, this allows filling and pressurization of filter and all the lines and any 'pin-hole' leaks will be seen.
Disconnecting and running out won't harm fuel pump but I once had that stick a float to bottom of carb after too long time sitting. 
The Honda has a valve to drain bowl and there is usually a 1/4 teaspoon or so left after running dry. |
Rollie Rose
Advanced Member
Username: profisher
Post Number: 459
Registered: 12-2008
| | Posted on Saturday, May 02, 2009 - 06:26 pm: |
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Shut offs are fitted into the filter housing on the engine side of the filter. |
Rollie Rose
Advanced Member
Username: profisher
Post Number: 460
Registered: 12-2008
| | Posted on Saturday, May 02, 2009 - 06:30 pm: |
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pilot, your primer bulb will work even better if it is not laying completly horizontal...the engine end should be elevated to allow the check valve inside to work effeciently. |
pilotart
Member
Username: pilotart
Post Number: 94
Registered: 03-2008
| | Posted on Saturday, May 02, 2009 - 06:47 pm: |
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Yes, I just placed it in that position to show in the photo. (lot of extra gas line)
It is usually vertical with the red (intake from Main Fuel Tank) end at lower end.
Primary Bulb's check-valve springs are weak and don't hold unless positioned properly.
This was why I had to install the check-valves at the filter, after a few months use, once experienced the Honda suck the Yamaha's fuel line dry.  |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 6810
Registered: 09-2006
| | Posted on Monday, May 04, 2009 - 01:26 am: |
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yes use stabil or seafoam, i use FP-60, nascar uses it http://lubecontrol.com/fuel.htm
do not pull fuel line and run motor
after done trailering, un-screw the drain on carbs
you do not wan to trailer a boat with no gas in the carbs |
Bob Baker
Member
Username: bbaker
Post Number: 17
Registered: 04-2006
| | Posted on Monday, May 04, 2009 - 11:27 am: |
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Thanks for the posts. Ok this might be a silly question... But why would you not want to trailer a motor with no fuel? Will the float bounce up and down, and possibly knock off the needle/seat? Never thought of this... |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 6832
Registered: 09-2006
| | Posted on Monday, May 04, 2009 - 03:39 pm: |
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yep, floats |
joel cunningham
New member
Username: joelc
Post Number: 2
Registered: 10-2009
| | Posted on Thursday, October 15, 2009 - 11:05 pm: |
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Ok lets not over do it use a fuel treatment on a reg. bas. Make sure you have water sep you can drain |
