On Jun 23, 10:47*am, Larry wrote:
wrote in news:7bc30477-49a6-401e-81e2-
:

Primer bulb on the fuel line? Yes I have one. Now that I think about
it, it has oil injector but probably carburetor...

Ok, first we need to use the primer bulb to test the fuel system for
operation, clogged lines, stuck floats, ripped open rubber diaphram in
the chinzy-ass fuel pump:

Tilt the engine down to its operating position.

Pump the primer bulb until it gets so hard you can't pump it any more.
Keep that last squeeze on it to see if it slowly squeezes down. *You have
now pressurized the fuel system inside the engine, having filled the carb
floats until the float valves shut off the flow. *The pressure from your
priming has also showed us there are no leaks because the bulb won't pump
up hard if there are, it'll slowly squeeze and gas will run out
"somewhere", even places you can't see. *We've also learned the diaphram
in the cheap pulse fuel pump doesn't have a rip or hole in it because if
it did you'd be pumping gas through the hole into one of the cylinder's
crankcase, flooding it with gas and the bulb will NEVER get hard that
way.

Now, IF you pumped that first pump or two and the bulb stayed flat and
refused to refill from the tank, you either have a clogged strainer
inside the tank...or you forgot to turn on the fuel tank exit valve....or
you have a clogged external fuel filter if it exists. *You need to find
out why the bulb can't pump gas freely as it's clogged up. *Isn't this
easy?!

Ok, we pumped the bulb at the dock until it got hard. *It stayed hard
even though we continued to squeeze it on that last squeeze when it got
hard and didn't notice it slowly bleeding off our last squeeze. *That all
went well, let's go to sea trials.....more testing with this little bulb!

Ok, now we need to WATCH the primer bulb before and after the engine runs
like crap. *We've primed the engine, already during the initial static
testing phase. *Crank 'er up and let it idle at the dock.

If it idles like crap and we've already primed it, the low speed jets are
probably clogged or we have an ignition problem. *That's about all there
is to a 2-stroke engine.

Let's say it idles fine, well, as fine as a 2-stroke ever idles. *Idle
out past the boats and docks into open water and have someone ELSE keep
an eye on the bulb. *Don't pump it....yet.

If the bulb starts to collapse on its own at any time, OPEN THE GAS CAP A
CRACK and see if it fills back out....the fuel tank vent is clogged if it
fills back out! *Damned dirt daubers! *Clear the vent, close the gas cap
and try again to see if you got all the mud out of it the wasps put in.

Ok, still watching the bulb for any signs of collapse, out in open water,
start running the throttle up and onto plane, normally not all at once. *
If the bulb starts to collapse at any point, open the gas cap again and
see if it refills out again. *The vent is ALMOST clogged if that works.

Ok, we're on plane and watching the bulb. *The bulb didn't collapse but
the engine started running like crap. *Start to pump the bulb while the
engine is running like crap. *If the engine smooths back out and picks up
speed, keep pumping the bulb until we get back to the dock. *The fuel
pump pulse line hose has a hole in it, has fallen off or is partially
clogged so the crankcase gasses pumping the little diaphram in and out
aren't pumping the little diaphram in and out. *The diaphram was fine in
our static test, but the pulse line that pulses the diaphram is blocked
or leaking too bad to pump it....we ran outa gas in the carbs....

You'd be amazed at the number of boats who asked me to tow them were just
so amazed when I told them to try that last paragraph so they could get
back to the trailer...(c; *Panicky people aren't too diagnostic of
problems.

Ok, we pumped the bulb and it didn't change the way the engine was
running at all...it still runs like crap. *Two possiblities, now, clogged
high speed jets because you put the toys away WITHOUT draining the carbs
by unplugging the motor at the dock and letting it run until it died from
lack of gas.....or ignition problems, probably caused by the cheap-assed
stator under the flywheel being all rusted up because it would have cost
Mariner (or any of them) another dollar to PAINT the iron core that's
shorting out....damn them all. *Take it to the shop and tell them exactly
what you did from my post to help them find the problem.

I'm already assuming you can see water pouring out of the ****er and you
see water sputtering out of the exhaust relief letting us know the
thermostats have opened and it's not overheating...right?

It could still have a leaky head gasket or cracked rings but I don't
suppose you have a cylinder pressure guage to test it or you wouldn't
have posted what you posted.

----------------------------------------------------------

The look on a boater's face when I tell him to open the gas cap a crack,
or the fuel valve he forgot to open, and the engine smooths out in 15
seconds, having watched his bulb collapse..........PRICELESS!...(C;

I've printed your message and I'll give a go next weekend. Thanks.