Mercruiser parts inaccurate motor

Climate East

New Member
May 14, 2018
23
Greenville NC
Boat Info
1997 330 DA
1999 280 BR
Engines
7.4L V-drives
hi everyone, I have. 1999 280BR that has twin 5.7 TBI motors. Serial number on the starboard motor is 0L349745 which comes up as a Gen+ and port motor is very close in sequence just don’t have it with me at the moment. My problem is mercruiserparts.com says this motor has a belt driven raw water pump which seems to be missing off of both of the motors. Perhaps they fell off and are laying in the bilge or the website just has it completely wrong. Just looking for tre correct impeller part number for the Alpha drive instead of pulling the lower off to find it. Anyone ever run into the issue where the serial number doesn’t match the engine from the website?
 
The engine diagram is showing a belt driven pump for the b3. Alpha has the pump in the drive. Look up the alpha drive diagram for the pump parts.
 
The site gives the option of Bravo or Alpha . Right ? Alpha's of that vintage will take the same part.
 
The site clearly shows that the sea water pump is belt driven. Does not state that it is for bravo drives only. Alpha drives have had it both ways. Someone please clarify this if you can. Thanks for your help.
 
The site clearly shows that the sea water pump is belt driven. Does not state that it is for bravo drives only. Alpha drives have had it both ways. Someone please clarify this if you can. Thanks for your help.

If your engines don't have the pumps on them then they have to have the pump is in the alpha drive, try referring that diagram for part numbers.
 
I guess my real issue is what else is different. I was looking to get a spare ignition coil but it doesn’t match either. I have a soft alarm at 3000 rpm and a no start condition when hot. If I need to buy the parts that I believe I need, what part numbers do I use, what engine do I look up to get these numbers. Anyone understand where I’m going with this?
 
Check mercury's web site to verify Vin's. Mercuiserparts.com is a dealer and could have the wrong info.
 
You should have a Mefi 3 ecm, which is incapable of a soft alarm.
Scroll thru that Merc site until you find the diagram that looks like what you have.
 
Mefi 3 is only capable of 1 tone and is limited to
low oil pressure
low drive fluid
overheat
sensor fault
 
I have to respectfully disagree. They have a soft alarm below 3000 rpm and a hard alarm above.
 
If the parts diagram doesn't look like the parts on your engine maybe you don't have the Mefi3 ECM.

Post up a couple of pics.
 
If the parts diagram doesn't look like the parts on your engine maybe you don't have the Mefi3 ECM.

Post up a couple of pics.
After going to the mercury website I have found the correct ignition coil and etc... I should have thought of that sooner. Just curious why you say the mefi3 doesn’t have a soft alarm
 
according to the ser # you have a serpentine belt, Yes?
Your ecm # is listed as 861926T3
Motor can be for Alpha or Bravo or inboard, whats yours?
coil is listed as coil kit 805570A2
 
After going to the mercury website I have found the correct ignition coil and etc... I should have thought of that sooner. Just curious why you say the mefi3 doesn’t have a soft alarm
I have owned 1 for years and have the 2 volume #23 service manual for it. About 800 pages worth with no mention of it.
 
My 2000 had one tone but it beeped for minor stuff and was continuous for more severe alerts.
 
You mention Alpha so you should have the GEN II drives Quicksilver kit QSL817275A5
 

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