My panga has a 75 HP Merc. '85 and has till now ran flawlessly. Last few times out it would not stay at idle and die. Only restarts after I squeeze
the fuelball, so apparently starving for fuel. Replaced the in line and waterseparator filters and also checked the fuel line for leaks. Maybe
fuelpump ? I was always under the impression that fuelpumps either work or don't work, no in between.
Not much of a mechanic by any means, but like to have an idea what to expect from a shop diagnosis.
Any input would be appreciated.gnukid - 7-15-2008 at 03:11 PM
I have had similar problems and after much efforts from Agencia Arjona on M. Abasolo in La Paz, I went to another mechanic behind CCC who demonstrated
that the carb needed a thorough cleaning. For this service I paid $200 pesos and the engine ran fine again.
It seems that imperfect gas can cause clogging or increased buildup on the float and possibly needles or injectors causing reduced flow.Cypress - 7-15-2008 at 03:11 PM
Plugs? Plug wires? Coil? Might be one of those electrical malfunctions?Diver - 7-15-2008 at 03:37 PM
Check all your wiring connections but it sounds like a dirty carb.
Many mechanics in Baja will "kinda" clean them but a good cleaning is often hard to find.
I hear that there is a certified Merc mechanic in Loreto that is pretty good.
Motor
Garry - 7-15-2008 at 04:10 PM
Unplug gas line an run dry before taking out of the water, also StaBill in the gas tank, I learned the hard way lots of $$$Hook - 7-15-2008 at 04:31 PM
Your post doesnt specifically say it but you did try simply replacing the priming bulb you have been squeezing, haven't you?Diver - 7-15-2008 at 04:42 PM
Quote:
Originally posted by Hook
Your post doesnt specifically say it but you did try simply replacing the priming bulb you have been squeezing, haven't you?
Very good thought.
I had the embarrassing experience of starting up my 9.9 at the lake and running just offshore before it died. Pumped the bulb and it started and ran
for another minute then quit.
Got home all lathered up and realized that the ball was very rotted.
Also, have you flushed or checked your gas tank lately ?
Make sure there's no gunk or water in there.Hook - 7-15-2008 at 04:48 PM
The bulbs do eventually fail, but often times gradually. ALWAYS the first thing to check with an outboard acting like it's fuel starved.Cypress - 7-15-2008 at 05:09 PM
Be sure the air vent on the tank is open.toneart - 7-15-2008 at 05:35 PM
Something I discovered was that one of the screw-in plugs on my water separator had vibrated loose and it was sucking air. On the water separator
there are 4 openings; two (on opposing sides, in & out) for the gas hose to connect to, and two)on opposing sides) for screw in plugs. I didn't
discover the loose plug until I had run a new gas line from the tank to the bulb to the motor, bypassing the water separator, just in case the water
separator was faulty. I happened to see it on the deck, where it had rolled underneath stuff.toneart - 7-15-2008 at 05:40 PM
Quote:
Originally posted by Garry
Unplug gas line an run dry before taking out of the water, also StaBill in the gas tank, I learned the hard way lots of $$$
Do you do this every time you take the boat out of the water, or just when you store it for an extended period?Cypress - 7-15-2008 at 05:56 PM
Always if for an extended period, if you're using the motor every day or so, it's not necessary.Udo - 7-15-2008 at 06:02 PM
Quote:
Originally posted by Cypress
Always if for an extended period, if you're using the motor every day or so, it's not necessary.
Running the engine dry...(whatever the engine is on, i.e. generators, air tanks, outboards, etc.) should be run dry so that the carbs or fuel
injectors don't get gummed up with varnish, especially if not running regularly.bill erhardt - 7-16-2008 at 05:54 AM
Quote:
Originally posted by Diver
...........I hear that there is a certified Merc mechanic in Loreto that is pretty good.
That would be David Cunningham, ph. 135 1869Pescador - 7-16-2008 at 06:02 AM
You are in the right mode of checking. If the diaphram has a small pinhole it will do what you are describing, but it could also be a leaky primer
bulb. Usually if it will start and run ok when you squeeze the primer bulb, then you can figure that it probably is not the carb. Also check the O
rings where you attach the fuel line to the motor.
