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Mariner 40E

R

Russ Bradbury

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For the past 4 or 5 years I ha

For the past 4 or 5 years I have owned a Mariner 40E made in Japan and it has a serial number of 6E9 L 408764. I think it is a 1984 model - can you tell me if that is correct? It's been a very dependable motor but I've recently noticed it has inconsistent water flow at low RPM's and probably needs an impeller change or the pump kit (probably never been replaced.) So I need a manual and the parts but I can't find this type of serial number listed on the web sites I've visited. If it is a 1984 model one site thought I would need a OE # : 47-899831 kit. Would anyone agree or disagree with that? And what is the most user-friendly or instructional manual available for this motor? I'm reasonably mechanically inclined but I've never tackled a boat motor before and think I should at least have a reference available to guide me the first time I try something like this. And are there any other maintence items I should address while I have it apart?
 
"To Drop the bottom leg undo t

"To Drop the bottom leg undo the two exposed nuts one on either side of the lower unit. Note you wont get those nuts all the way off until the other nuts are removed and the leg drops a bit. Through the top of the plastic lug at the back of the lower unit there is a bolt that holds the trim tab anode, remove that lug then undo the nut and remove the anode. up in the cavity from where the anode was, there should be another nut underneath a bit further forwards remove that also. once the 5 nuts are off the lower unit should should drop down. the drive shaft included. the water pump is easily visible encased over the drive shaft. three nuts to undo enabling removal of the cover exposing the impeller. Pay attention to how the gaskets and plates are set so they are replaced correctly. check quality of gaskets etc. remember when removing impeller from shaft there is a key way and the key will probably fall off when you slide up the impeller. remember to clean all parts and thouroughly flush the pick up from the pump assembly down to the bootom intake in the leg. remove the plastic mesh cover at the first inlet at the bottom of the leg and clean out, as gunk and broken bits of impeller can fall down into it and affect efficiency of water inlet. I will also do some digging up for you based on your serial number to determine year etc. Also check ebay for Cd rom repair manuals for merc / mariner. I have one it cost 5 bucks on ebay and is invaluable."
 
"Russ, It should be a 1984 mod

"Russ, It should be a 1984 model electric start, long shaft, and i believe 100% Yamaha built for Mercury and dressed as a Mariner.


40C (TWIN CARB) Serial # 6E9-400231 THRU 6E9-423162 (EL)... thats the best i can find out for you"
 
"view of lower unit for your m

"view of lower unit for your model

148831.jpg
mariner 40 lower unit
 
"Yes, your get her Brent - it

"Yes, your get her Brent - it is definately a Yamaha Mariner. You need to find the Seloc's manual for Mariner models of that vintage - they are nothing like the Merc Mariners of the same time period.

Impeller for that is Merc part number 47-99971M (about 50 bucks) and the kit is 84363T (at about 100 bucks) - both still very much available.

The Yamaha part number (kit) is L710-84363T and is about 10 bucks cheaper than Merc."
 
Wow! Thanks for all the info

Wow! Thanks for all the info and advice! I'll get a kit and a Seloc's manual and/or a cd rom ordered and dive into this project some weekend this spring. I'll let you guys know how it goes.
 
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