2002 75 hp mercury

[Bgctrading]

I have a 2002 75 Merc. 2 weeks ago when I had it out it ran perfect. today it would never open up generally my top speed is 32 and today wpuldnt get above 20. As I was running with throttle wide open I could bump the choke on the key and it would pick up a touch then fall back down. If I held the choke in it would sputter and nearly die. Any ideas? Fuel filter was new about 30 days ago and the bulb and fuel line were new last year.

[fishinwrench]

Need a Serial #.  A 2002 75 could be a 2S, 4S, or a DFI.

Sounds like it is lean on one or more cylinders, but it is best to start your troubleshooting by first verifying that cylinder compression, and ignition output is good on all cylinders.  Eliminate any problems there first, and THEN you can attack a fuel system issue.

 

[Bgctrading]

It's a 2 stroke I'll find the serial. Wrench you worked on this boat a few years back for me.

[fishinwrench]

Oh ok.  I can't keep all the people and boats straight in my memory anymore. Either there has been too many of them, or Alzheimer's is starting to set in. 😊 

 

[Bgctrading]

What's the best way to test the ignition output

[fishinwrench]

1 hour ago, Bgctrading said:

What's the best way to test the ignition output

Since yours, if I understand correctly, is only loosing performance above 1/2-3/4 throttle the output on the stator needs to be DVA tested. 

Without a serial# I can't know which ignition (CDI / CDM) your Mercury has. 

It's that whole memory thing again. 😊

[snagged in outlet 3]

4 minutes ago, fishinwrench said:

It's that whole memory thing again. 😊

Could be "chronic" problem.

[fishinwrench]

Yeah, I should have never quit the chronic.  😎

[Gumboot]

3 hours ago, fishinwrench said:

Need a Serial #.  A 2002 75 could be a 2S, 4S, or a DFI.

Sounds like it is lean on one or more cylinders, but it is best to start your troubleshooting by first verifying that cylinder compression, and ignition output is good on all cylinders.  Eliminate any problems there first, and THEN you can attack a fuel system issue.

 

Shouldn't you finish fixing Ranger520vx's Evinrude 60 before you start another job.

[Ranger520vx]

Lol we haven't had time to do much with it lately. Hopefully we can get back to it before long.