240efi

Hey I have an issue with my engine surging, hope someone can point me in the right direction. I have a Mercury 240 M2 Jet Drive. It starts up fine but when I put more throttle to it, it starts to surge. When I have it in the water it is a back and forth motion. I do have new spark pugs in that...

Bought the boat for really good price knowing it was going to need some TLC. Had a blatant fuel delivery issue as fuel was pouring out of throttle body. Pulled apart and found lines going into fuel rail were disconnected and a couple other little things inside that lead me to believe someone had...

Hi all, So I've done a bunch of searching on this on the forums here, and I've found a lot of info, so here's what I have going on.... So I have a 2001 Challenger 1800, that had a blown engine when i got it. Replaced with a reman short block in 2008. Was running well after rebuild.....only...

Hi All. My Merc 240efi Sport Jet would not start. Traced to low compression on #6 cylinder. At strip down I found #6 piston crown missing a piece and the barrel scored. Decided to rebuild the complete engine. I have had the block bored out to 0.015" O/S on all cylinders. I am using the WSM...

So I went to start my boat tonight only to have this grinding noise when the starter was engaged. Upon closer inspection I found a chuck of magnet wedged on the side of my flywheel. :redface: The chuck is roughly 2 inches wide and about 1.5 inches tall. Needless to say I'll be pulling off...

I had a hard time restarting my Challenger 2000 with a Mercury 240EFI engine when it was warm. After reading that other people had solved the problem by replacing the temp sensor on the engine (passenger side) I gave it a try and it fixed the problem. Short story: The insulation on the...