On Jul 13, 10:17*pm, "Steve" wrote:
Well its not a pinhole in the pickup tube. Have started or seen the boat
since sunday. Started right up. So i be thinking...
What about the internals of the distributor, can a pick up coil go bad?
Can I use a igntion module from a car to test it again? Does anyone test
ignition modules?
Thanks
Steve"Florida Jim" wrote in message

b.com...





On 7/13/2011 1:04 PM, John H wrote:
On Wed, 13 Jul 2011 11:07:38 -0500, Boating All
wrote:

In ,
says...

OK let me start over, It is the Chevy 3.0 litre engine.(4 stroke) alpha
gen
II outdrive. a 2005 to be exact.
Symptoms: *Will run great all day, when it gets to a half tank or at
the end
of the day, it will start and run fine, but when it idles for longer
than 10
minutes, it will die. Then after it dies, it is VERY hard to start and
will
only stay running at over 2k rpm. go back to it in a day or so, it runs
fine
Runs great all day. *So it's not a heat/electrics problem.
Half tank it gives problems.
That means a bad fuel pump or bad tank venting.
Check fuel pressure at full tank and at half tank.
Simple.
Bad tank venting. I hadn't seen that yet, but it sounds like it could be
the problem. Create a
vacuum and you've got a problem.

Good 'eyes'.
Another guess. Pin holes in pickup tube in gas tank.

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Electronics affected by heat very seldom operates partially. If the
trigger sensor in the distributor or the ignition module is failing
when hot it would be a lot more likely to fail completely. Then work
again when cooled.

You said you tried a known good module? What happened then?

The merc ignition components are pretty reliable.