Found some melting on an injector connector same one rinda found fault with f injector wire short. Anyone know a source for an individual connector to avoid buying entire harness; 2004 mercruiser 496 HO... Thanks

Send a picture of the existing injector and or harness connector. Here's a brief list from Summit.

http://www.summitracing.com/search/d...nector-pigtail

you can buy pig tail repairs from about any national parts chain or your local GM dealer.

Thanks I'll try a dealer, all other sources can't match it up......

Pigtail came in installed perfect fit. Thanks Guys for info...... Ran the boat same problem. Running 3900 rpm. Problem engine laggs the other engine as far as throttle position/rpm. Then after a set time the engine rpm drops, constant horn sounds i reduce the throttle to idle horn goes out and I can push it up and run again. It will run at 3000 rpm so far all day long no issues. Oil pressures 50 psi, water pressures 26psi temps 165*... Possible fuel restriction??

constant alarm should be oil pressure or overheat, might be faulty sensor.

look here http://www.diyautotune.com/catalog/w...063a00792878e7

and here http://www.diyautotune.com/catalog/7...kit-p-380.html

Thanks guys, got one on Partsgeek. Not a fix. Still get a steady alarm. Starboard temp sensor on exhaust is suspect. No alarm when sensor disconnected. Port side alarmed only at WOT after 5 minutes.. Will try a full flush.. Could a build up on sensor impact operation?

the sensor gets plugged from debris and cant read water pressure.

Do you think its just pressure sensor and not temp sensors....pressure sensor reads about 26psi when running...