1999 200efi

blazer81.6

Seaman
Joined
Jan 25, 2009
Messages
57
I thought I had previously solved my problem but learned otherwise Saturday while taking it on a test run. A description of the problem follows:
The motor ran great for about 1/2 mile or so but then suddenly stalled without any hestitation (like turning the key to the off position). The ignition box sounds a series a beeps (constant) while the key is on. Normally (before mechanical trouble), when turning the key on there are two beeps, fuel pump is running and then I can start. I've noticed when I turn the key on, two beeps follows, I can also hear the fuel pump engage. When there aren't two beeps the fuel pump doesn't engage. I've replaced VST gasket, syphon pump, cleaned water seperator, hooked up an alternate fuel tank,etc. I'm leaning toward an electrical problem now, really unsure at this point? The motor is hard to pattern. Sometimes it will make it up the lake a couple hundred yards (just enough to spend all evening trolling back) then other times it suddenly stalls with a rev of the motor (without leaving the trailor). Could this be a failing fuel pump? Thank you so much for any much needed insight. Also, on the fuel pressure check valve I'm reading 41 psi when the key is intially turned on but bottoms out when the engine stalls. Should 41-45psi remain on this check valve or just when the engine is running?
 

CLAYC

Petty Officer 3rd Class
Joined
May 12, 2004
Messages
76
Re: 1999 200efi

Hmm.. Your fuel pressure should remain 36-38 psi at rpm and under load.. You might send an e-mail to Brucato Injector Service in North Carolina. They are EFI experts.
 

CLAYC

Petty Officer 3rd Class
Joined
May 12, 2004
Messages
76
Re: 1999 200efi

Check your spark plugs... EFI's will do weird things with improper plugs. Ran into a similar problem on a new rebuild.. The Merc Manual had a misprint in one section, called for the incorrect plug. Check all grounds and battery connections and load test your crank battery.. You might find a marine center with a dyno, save some trolling time.
 

blazer81.6

Seaman
Joined
Jan 25, 2009
Messages
57
Re: 1999 200efi

I took my boat out yesterday and ran it while hooked to the trailor for nearly 20 minutes with no problems noticed. I could hear the fuel pump engaging. Could this be a ignition switch? If anyone has any test procedures please post, thanks.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,930
Re: 1999 200efi

Check all your connections to ECU,and red wires on rectifier/s. If all are ok,you have a ECU problem. Send to Brucatosvs.com and have tested. As CLAYC says they are great people.(Linda & Tony)
 
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