2004 mercruiser 4.3 LX won't start

[mswettsr]

Recently purchased a 1994 Bayliner Cierra 2355 with a 4.3 LX that had a cracked block. I purchased a new engine from Perfomance Product Technologies and had it installed by a boat mechanic. Had good luck with the boat for about a week. <br /><br />After cruising on the lake at 1600 rpm for about two hours, we accelerated to 3200 rpm for about 15-20 minutes and the engine died.There were no indications on the dash gauges that there were any problems. I checked the engine compartment for unusual smells or misplaced wires but found neither. I tried to restart and the engine appears to start and die immediately. I tried bypassing the fuel/water seperator and adding dry gas - still no luck - ended up getting towed in. I replaced the coil and still same problem.<br /><br />Could use any help - summer is almost over in Maine

 

[Bondo]

Re: 2004 mercruiser 4.3 LX won't start

You're going to have to do some Basic Diagnisistics,...........<br /><br />Is there Gas present in the Carb,..??<br />Is there Gas present in the Cylinders,..??<br />Is there Power to the (+) side of your new Coil,..???<br />Is there Fire at the Coil Tower,..???<br />Is there Fire at the Sparkplugs,..???<br /><br />That'll leave Compression,+ Timing,.......<br /><br />Good Luck.......<br /><br />BTW,.... Welcome to the forums here at iboats.com,.....<br /><br />Where abouts in Maine do you call Home,...???<br />I was born,+ raised in Old Town,.........

 

[Don S]

Re: 2004 mercruiser 4.3 LX won't start

If you have an electric fuel pump, the pressure switch just above the oil filter may have gone bad.<br />Hook the two wires together to test it, but don't run it like that as a fuel leak would be impossible to stop.<br /><br />Item 5 in the drawing is the pressure switch.<br /><br />

 

[mswettsr]

Re: 2004 mercruiser 4.3 LX won't start

Hey thanks for the quick responses - I'll do the checks tonight.<br /><br />Portland,ME is home