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Hi guys, Just doing a quick check to see if I've missed anything. Have twin merc 454 7.4l MPI's with Hurth 630 tranny's. 2 problems: 1, I top up the heat exchanger with the proper fluid but as the engine runs it comes out of the exhaust. Check the heat exchanger after the run and it is topped...

Hi all, have twin merc 454 mpi 7.4l inside engine room. Starboard starts just fine but port wants to start but doesn't. Port engine cranks over but not as it should. Almost as if the batteries are dying but they are good batteries. Even ex hanged the batteries with the starboard engine and...

H iguys, Straight to the point. Last season, shafts spun normally. Only thing on my starboard shaft I notied there was an excessive dripping that annoyed me, so I tightened the stuffing box so there was no more driping. Unfortunately, after reading other posts I found that some dripping is...

Hi all, I have a pair of drop in Mercs 7.4L MPI's 2001 models in my 390 Sea Ray 1989 EC. Just over 600 hours on each and neither has ever had a problem before. I've seen and been on board of the previous owners boat and they are emaculate as to condition and running. Both are now in my boat...

Guys, needa bit of advice. I have a 1989 390 Express Sea Ray. Have been running original gas 454 Merc engines for over 20 years until of late. Got a pair of replacements Mercs that are fuel injected, I beleive somewhere between 2001 and 2005, not one thing wrong with them. Went to a mechanic to...

Hi all, I've just had my 1989 Merc 7.4L engines refurbished on my 1989 390 EC. Was out on the water and the port one had a high pitched knocking sound on the top end of the engine. So I shut it off and decided not to run it till I decided to pull it out of the water. The engine will not turn...

All, Having some issues with my 1989 390 EC Sea Ray. Last winter another boat broke free and struck mines during a winter storm and ripped my port trim tab off. I've been on the hunt for a new set of trim tabs, but I seem to be having worlds of trouble finding the match to the factory set...

Need an asortment of parts for a 1989 Searay 390 EC. If you have anything I might just be interested. Please hit me up. Thanks

All, I have a 1989 390 EC and the cabin entry door has finally met its life expectancy. The track wheels are shot, the door is starting to come apart and the overall look of it is a bit dingy. Im sure this all can be fixed in somee way, if not replaced. Do any of you knwo where I can scope out a...

All, I have a 1989 390 EC and the cabin entry door has finally met its life expectancy. The track wheels are shot, the door is starting to come apart and the overall look of it is a bit dingy. Im sure this all can be fixed in somee way, if not replaced. Do any of you knwo where I can scope out a...

Hi all. I've recently had my 2 454 Mercs completely restored. All was fine for the first 12 hours, until I heard a strange knocking sound come from my Starboard engine when I put it to 3000 rpm's (noise can after about 20 mins of run time). Now, in idle it is noticeable as it is in forward or...

I have a 1989 390 EC and my transom or cabin entry door, whatever you want to call it, is very hard to move. Obviously the rollers are gone. But I would like to know where can I purchase a new set? Also, by the looks of things, at the base of the door on the outside there are several screws that...

Need Help all. I have a 1989 390 SeaRay EC and am having fuse problems. I would like to see the wiring diagram for this model or similar model or a a diagram on how to switch from a fuse box to a circuit breaker. My fuses have a bit of corrosion on them which is causing battery and electrical...

I have some corrosion on a few of the fuses in the engine compartment that connect to the batteries and bilge pumps. Does anyone have a wiring diagram for a 1989 390 SeaRay EC? Or does anyone have any advice on how to upgrade from fuses to circuit breakers?