Yamaha 5BS L661 Owners/Repair Manual

Greetings

I am looking for an owners or repair manual (general maintenance) for the above. I have trawled the net but have been unable to find a reliable lead. Since the engine seems to be 1980s vintage then I assume an electronic version may not exist. I would be happy to pursue the channel of buying a manual hardcopy, if I can find one.

I simply want the accurate and type-specific info regarding stripping down and rebuilding as general pointers for other outboard types may mislead me or I might miss something. I like to do things right rather than blunder in and end up with a box of loose parts. The engine is a good runner but I want to clean her up and keep her running so the urgency is off at the moment.

Any help here would be good.

Kind regards
Padmack

 

I have the same problem with manual. This outboard is made since '73 (Products History - History | YAMAHA MOTOR CO., LTD. https://global.yamaha-motor.com/about/history/products/). My outboard is like new inside, just outside is a bit scratched. Week ago i changed gaskets on the propeller shaft and added new oil. Today i got new spark plug(old was NGK BP6HS, bought the same). Now it is starting and going fine(was a problems with idling and statring). Had a problem with handle, repaired it today(cable tension was faulty). I will try to fully restore it in winter, because no time now.
I have i problem with spark plug cable, its just bad(i think very old.. the rubber is dead). If i touch the "ground" and the cable- it cuts. I need a new one and i dont know where... Will try to insulate the cable with some electric resistant tape, but i dont think it would help.

About oil change in transmission:
There are 3 bolts, top one is oil level bolt, bottom one is for "pulling out" old oil and adding new one. The middle bolt i dont know... I made new seals on those 3 screws myself.
I changed rubber cover seal, got new one, and used loctite sealant to be sure. Changed bearing too.
The cost is miserable. ~3 euros bearing, 3euros for gasket each, new seals for 3 bolts ~0.5euro+work with scissors.

Any help would be very nice...

Sorry for my bad English, not native.

 

Is that the air-cooled 5 hp engine ? I'm pretty sure that one was also sold under the Mariner brand for some years, and there may have been other brands as well, but I would be looking at Mariner in particular.

 

Yes its air-cooled. I found it in boats.net. I checked visuals, looks the same like my yamaha 5bs 661. Here is the link, may be useful for someone. Mercury - Outboard Parts by Year (Mercury, Mariner, Mark, Force, Chrysler, Sears, SportJet) - Mariner Outboard - 1977 - 7005207 OEM Parts - Boats.net https://www.boats.net/catalog/mercury/outboard-by-year/mariner-outboard/1977/7005207

Thanks fof help.

 

Hi

Further to all this - I still have this motor and I am currently upgrading control system. I have steering sorted but I am looking to get throttle/shift hooked up, if possible. Does anybody know if there is a suitable throttle with ends? For example the Morse 33C or equivalent has a threaded end with jam nut for a eye but this yamaha has the barrel end. Tiller throttle cable part # is 65w-26311-00. This is akin to a bike or lawnmower. Any advice here would be greatly appreciated. If I can figure out how to post a photo, I will.


Regards
P