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1  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: March 11, 2019, 06:47:33 PM
advice taken thanks mercman
new yellow leads and ,disy and plug boots  and new springy connectors should land from states in the next few days .$90 and $30 postage roughly
last  run i adjustedthe idle jet screws and idle stop on the water in gear . was idling low nicely but after sitting for an hour that setting wouldnt start very well
so i ran both screws back in and then 1 and 1/2 turns out and bang starts in a flick of the key so ill leave it at that. whilst doing so and playing and tinkering with stuff while its running under load with a friend driving ( bay was so flat ) i got a zap
off something around the dizzy- throttle linkage area .  i did run at night to check in the dark to see a short or spark leakage  but it was in drive on muffs with no load . and nothing . so hence get new leads first .. if no change then stator /alternator






2  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: March 03, 2019, 12:44:03 PM
 used it a few times .
dreaming of a new outboard 4 stroke @ 9100.00 just goto come up with the cash
 also decided to get new stator . under flywheel ,new internal loom and new leads and boots cost around $600 all cdi
if it doesnt fix it ill replace the switch box with cdi replacement around $300 .
timings good link and sink goodstill reving max at 3100 and plaining, so im chasing 2000 rpm .( have voltage fluctuation up and down )
have two rectifiers and both ok so ?
gets me out and back at the moment so im content , at least i have caught a fish .
time has come to start throwing some dollars at it ( parts not  mechanics )
3  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: February 17, 2019, 02:20:22 PM
sunday morning .bays flat .slipped it in. idle , Grin out trim it in.....go ! up .up up . slowley revs increase .and we are now ....plaining   Grin
check tacho , 2800 2900 3000 3100..wot played around with trim and had me and mate jumping around up front trying to increse rpm by weight distribution
but moving and plaining    But it was fun ! finally after 1 year i got it to move along
aadd some chop and swell and its probably back to useless again! but is is a positive .(Frankenstien phsyco engine ...gives you a little bit of improvement just to keep you hooked )all it had to do was rev to over 4000 rpm under load !and i would have spent  money  replacing any part with any new parts i could find
on the web .slowley week by week .
Im thinking now ,, becuase i fixed it this far ..of finding another mechanic  drop it off and say nothing of my past history
" i was out last sunday mate and its was not reving over 3000 rpm ..strange hey " and leave it with him  Cheesy Cheesy Cheesy Cheesy Cheesy Cheesy   Roll Eyes
4  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: February 15, 2019, 07:19:55 PM
thanks -Austral,Mercman and thanks Mark
Water in the plugs would mean .. in the water at dock reving to 3-4000rpm   waterpump pumping hard would maybe  give me ,missing or lumpy rpm ..not getting that . it revs clean to 4800 under no load ..( i may be wrong )
in the first week-  i opened a can of worms by opening controller  , total re wire as it was all stuffed . water had got in through choke button and all the wire had perished and corroded . all redone  .tested from controller to conections inside the engine therefor testing the loom and black external plug and internal wiring loom for continuity and voltage with a multi meter  .but i will check that loom end again 
vent checked...... i recon every time i  try it ( isnt that the first sin ?)
timing mark lines up and piston top dead  center .. visited that at the time of the flywheel re install and  yep ill re check that
Marks correct.the houseboat prop would still rev ..i didnt read some pdf i found correctly. Information overload
no havent squirted fuel in under load ... and im  using good fuel and oil ..had 91octane  and tried 95 .( which is better?)
i have not tested in the water for 3 weeks. so i should try it again  before i pull it all apart
i have missed something. ive just got to find it


5  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: February 10, 2019, 12:44:02 PM
Hi . great thinking and good theory s
but being the fact that i have video of this engine wot and up on a plane ,3 minutes before it stopped
it coughed a bit ran a bit and coughed and died .  which we have found out to be the flywheel spinning and shearing the key. no start again
and i dont think it sheared the key due to a sudden lock up stop !i died slowly so i asume it was due to incorrect torque setting on flywheel nut .not tight enough
and the guy i bought it off ran it in this configuration before me . with this prop ...he did admit that i didnt go as hrd as it did after i tinkered and lubed the dizzy magnito thing ( 1 st post )
so ill push reset ( wish there was one ).and go back to the start .chapter 1 page 1 and with a fresh head
 check voltages . sparks . can now check timing in gear at idle  ( im suspecting timing still  rememering 2 mechanics have both suspected timimg )
i l do a link and sink  checking that
mercaman thanks for your input ..
im working on a 4-6 deg atdc idle  38deg ithink wot
but other ignition setting for like wise engines seem to be all btdc?
the plugs firing before it reached tdc  understanding it advances as the revs increase to pre anticipate the the next time to fire
but still weird some are before .and a few are after ..or am i wrong and my timng settings are wrong
and sorry mercman there is no showcase or mercedes benz after this quiz if you win , but i will sell you my 1969 280s ( 2 50 year old headaches that both start with m)

6  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: February 10, 2019, 12:05:56 PM
made a tank
7  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: February 03, 2019, 03:20:20 PM
thanks for that reply Mercman
been a week or two now .  sorry
ive done this and that   done some more research
yep its a frankenstien ....so its just guess work
it could have a 50 hp powerhead on it ..so putting plugs for a 65 say l17v may not be right as the 70s model runs a l77v plug
the timming for a 1969 650 is different from a 1972 model
mine seems to be made up of parts from 67 - 73 so its trickyim across the road from the guy i bought it off . he said it had rings and a new top where the plugs go in  done about 4-6 years ago buy someone out of town
hence why its got good compression
as i said ..it starts idols revs  but only to 2 2000 rpm underload.after injecting copious amounts of carbie cleaner down carb 2 my forth plug seems to be getting fuel oil .as is wetter than before and i used a different plug so i think we are on all 4 cyliners.
so this brings me to the prop . i have the original as a spare buts its stuffed ,has the numbers on it  mercury original 13and ? x 15 pitch
found tables with prop sizes and pitches for  65 hp from that era
i cant tell what ive got on as i cant find any id numbers ..
i should have a 13 .5 x 15 lets say .. different prop pitch and size for d``ifferent revs of the same engine 
it says that a 13 will rev to 4800-5200- but a 14 with some ?inch pitch ..which is designed to push a houseboat will rev to 2800 but have heaps of push
so maybe ive got a bloody houseboat prop and nothing is wrong with my unit!
so i stopped at a mercury parts shop and enquired about buy a correct prop  for $200-300 willing to give it a crack
and the guy says "reckon your wasting your money .youve got other issues and didnt even offer me a prop ...
so i have finally decided to give it away . i give in . i cant afford to buy anew 60  at 8 grand ,but i dont want to buy somebody elses second hand 20 year old piece of Huh that they want half the original price for out of gumtree or ebay ..ive learnt my lesson
just because it starts and runs doesnt mean its a good outboard
a friend of a friend ended up being a mercury outboard expert . he loaned me the flywheel remover and a compression tester small enough to get to no 4 plug
 comp is good all 4 around 120 psi  and even 
anyway stuck with a no go boat ..thinking of giving back to the guy i bought it off ($1000.00) and and telling him to keep his money and have his boat as im over it  luckely it was more time than money spent  Cheesy Cheesy Cheesy
lessons learnt 
8  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: January 22, 2019, 01:37:00 PM
THanks Mercman
done that .....blue spark constant on plug lead 4
plug firing
sunny bayside  moorabbin
didnt get to water on weekend . will try asap
its not over till its over

9  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: January 15, 2019, 08:26:06 PM
Thanks Mercman
cranked the outboard at night . no leakage
when i cleaned the dizzy i checked all conections at the boot and spring sparkplug end  ..yes copper wire
sanded all contacts and springs and rotor and dizzy to remove any bad connection .corrosion
checked for continuity with a tester ..cranked engine with a spark tester and all good sparks
checked tooth on wheel and belt .. arrow and timing dots line up like a straight edge was used
dropped it back a tooth  .. starts  idles .. timing mark on flash on cylinder 1 is right on .......no 4 and line cast in top of castingPhoto i hope )
sticker could be wrong.....when arrow and marks line up ...idling on 800 rpm its timing at 4 - 6 deg on sticker marks
seems to be like they say in the manuals
any way  tes you are correct again Mercman ...no 4 plug is cleaner than the rest
has signs thats its been fireing but its not as oily and fuelie as the others  yet its getting good spark
surface disgarge plugs ..inner coil is black yet the outside circle is clean ..the other 3 are burnt black
i laugh as i know that im now moving to another part of the engine arnt i ...
lack off fuel getting into cylinder 4 ... even though i cleaned the carbies ?..
Compression  ...ill check 

10  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: January 07, 2019, 01:27:24 PM
well it works- but im back to square 1
starts well idols well revs to 4800 at pier
but only 1800 under load
removed the plugs at home ..black ..its running rich
but that could be that at wide open throttle alot of fuel is going in  at 1800 rpm they are fouling up
my hunt for the solution continues
more research ..
ive never checked compression but the past mechanic said good comp and good spark!
rectifier is good .maybe stator not enough power under load for hot sparks maybe
now i am definatly starting to nuts

 
11  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: January 04, 2019, 04:34:20 PM
Thanks Mark
for its age its definatly had doner .parts
recieved the flywheel keys in the post ..they match the key i used exept for a slight flat on the back
they are basically the same .
tested on the water and running .fixed the key/ timing issue all good
starts well idols well . but back to the original problem of no top end
have pulled out jets and inlet s
cleaned and tested all leads and distributer cap  had a bad connection on lead 4
lubed greese nipples on the dizzy again
will try again ...
12  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 29, 2018, 07:20:07 PM
 dizzy and ignition (type 3 ?)
13  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 29, 2018, 07:16:23 PM
65 hp
14  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 29, 2018, 07:10:54 PM
Hi mercman .sn 2287548
has blu band but red 650 ss under that sticker
i think its at 50 years old its got bits of anything compatible
have put back together .found  a woodroff key ..pack 110 assorted
found 3x6.5x16 did the trick ( have ordered 2 x originals from states )
 cleaned up the surfaces with  valve grinding compound  cranked the nut to 75ft pounds torque and
relocating the belt back onto the gear on the flywheel was the hardest part
set the dizzy arrow to the flywheel timing mark .droped on the belt to the dizzy gear
turned it over a few times and it started and idles nicely
has throlle when given the diizy a tweet with linkege disconnected ....
will give it a crack
(trying to post pic s

 
15  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 24, 2018, 11:48:18 AM
confirmed broken key on flywheel  pulley connected to flywheel which explaines everything to do with timing marks not being out  now hunting for woodroff key
 by the way can anybody identify this hull ..
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