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Pair of Cylinder Heads from a 2006 8.1 Mercruiser Horizon engine. Heads have a fresh valve job and are ready for install

Have an 06 340 that took on water. Was away from the boat for a while(a few weeks) and upon entering, noticed a definite list to port, the boat was low in the water and everything electrical dead (except the shore power. That was still on) with about 2’ of water in the cabin. Obviously could not...

Engine ran great three weeks ago. Went to go out today and the starboard engine would turn over and start as normal but immediately shut off (one second or so). Thought maybe it was my (not so) friendly Gen 3 Cool Fuel unit, so I put a gauge on the rail valve. Got 43lbs when switch turned on...

I could only find the process for bleeding fuel lines for the fuel injected version. Can someone share the best way to bleed the line for the carbureted version? Fuel tank gauge faulty, resulting in running out of gas. Has not started since.

Fighting with my actuator. Stopped working. Cleaned and lubricated...still no joy. Bought a new one. Still nothing.I swapped out my EIM and dashboard panels recently but this had stopped functioning prior to that.

Having a rough summer (as referenced in another thread) engine-wise. Latest issue...I pulled the injectors on both engines on my 06 340. Had them serviced and while I was told they were pretty rough, they all came out good. When I put them back in today...upon starting the engines there was a...

Can someone tell me for certain if part number #8M0047215, which is the new replacement module, ONLY comes with the new style of both water inlet and outlet coming out the front (bow) end? Is it possible to get a unit of that number that is the same as the old style, with it having hoses on the...

I am having an issue with the port engine on my '06 340. Both engines fire right up and run solid. After 30 minutes or so, the port engine drops a couple hundred RPM, then a couple more, then shuts down completely. Will turn over, but will not restart. After several hours, fires right back up...

Considering upgrading my electronics package on my '06 340 Sportsman. Happy to hear any input from others on what thoughts might be on proposed direction, etc. Here is what I am thinking: Current System Mercury Marine Vessel View Raymarine C80 Raymarine Radar Raymarine DSM 300 Raymarine ST...

Anyone else going? Winter is hammering the midwest. Just seems we ought to get together and have a drink in their honor with our beautiful 80 degrees!

Quick question for those of you with a 340 or similar and experienced in South Florida waters. I have been South Florida Boating for years. Most of it in smaller crafts. I have a good friend coming to town Friday and we were planning on a run over to Bimini. Current forecast is: SATURDAY...

I have a 2006 340 that I am trying to clean up and fix wiring on. I have a basic question about NMEA wiring. Right now, the Vessel View 5000 NMEA Input is tied to the C80 NMEA Output. All is working as desired. I want to tie in my Uniden UM415. I am unsure how to do this as far as where the ins...

New to me 2006 340. Still has the original C80, Radome, DSM300, ST6001 electronics setup. When I got it, the C80 powered up and the scanner worked, but no fishfinder and no GPS. I have cleaned up the wiring and GPS is now functioning properly. On the DSM300, I have metered that power at the...