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Re: 1999 270 DA, Accidentally switched battery selector to "off" while running. Mist All, Thanks for all the advice & help. Discovered the ECM was the problem. Unfortunately, for the 1999 7.4 MPI Merc, it is a part that is no longer available. Was fortunate enough to find a used one & it...

Thanks Bt Doctur. Found what you've mentioned to be correct in my investigations & going through the service manual diagnostics last weekend. Unfortunately, my findings have led me to the ECM as the problem. Not getting a signal to the fuel pump relay from the ECM, not even for the 2 sec that...

Thanks for the input JimG. I found a fuse in stock & am going to head to the lake this weekend & try this out. Hopefully it is the only issue. I appreciate the help. Brando76

Re: 1999 270 DA, Accidentally switched battery selector to "off" while running. Mist All, Thanks for the responses. This is helpful info. I have to travel to get to the boat, so i will check out this weekend. I did try & reset the breaker on the engine. It doesn't seem to have popped. To...

I have a 1999 270 DA. The battery switch was turned to "off" while running & blew something that i cannot find. Being told that it's possible the 90 amp fuse on the back of the starter is blown. Originally i discounted this because the starter will crank but there is no "beep" when the key is...

Hey all, Any advice would be much appreciated if you have any suggestions. We made a mistake on our 1999 270 DA 7.4 MPI (single engine) & the battery selector was accidentally switched to "off" while running. Seems to have been a big mistake & the selector & manual read never to do this. Kind...

Thanks for the info Jakester. Good luck w/the new stat, hopefully that does the trick. I think I will check & see what mine is also. Couple of quick questions on the performance you described if you don't mind. 3500 cruise @ 28 MPH - Full of water & fuel? How many people can you have on...

Hello all, Sorry I'm new on this site & just realized I should've posted here instead of on the general discussion. Anyone have any info that can help me per below? I've recently purchased a 99 sundancer 270 Merc 7.4 MPI w/Bravo III & am trying to get set up for the best performance to be able...

Jakester218, not sure if this is helpful or not. Mine is a 1999 w/the same combo as yours & in 83 deg F water my temp was varying between 150-175 deg F. I found that after running for a bit, I need to idle & cool down some or it won't restart. Appears to vapor lock or something. Didn't think...

Hello, I've recently purchased a 99 sundancer 270 Merc 7.4 MPI w/Bravo III & am trying to get set up for the best performance to be able to cruise but am at a bit higher elevation. Most use will be at Lake Powell elev. 3600' I have changed the gear ratio in the drive from 2.0 to I believe 2.2...