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1  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 

2  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

 
3  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 ...
4  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 ?)
5  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 29, 2018, 07:16:23 PM
65 hp
6  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

 
7  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 ..
8  Vintage Australian Outboard Runabouts / Information Wanted / Re: mercury 650ss 1967 4 cyl on: December 18, 2018, 06:43:57 PM
thanks Mercman ill check it out ..and post the results
9  Vintage Australian Outboard Runabouts / Information Wanted / mercury 650ss 1967 4 cyl on: December 15, 2018, 12:34:01 PM
Hi im Ant
thanks for your exellent forum
ive been googling nd tinkering for 6 months on my problem
I aquired a 14.5 fibreglass runabiut with a 650 ss engine
the engine started ,but hadnt been used for 18 months and little use before that 
on its first run on the bay it  only reved to estimated 2500 rpm (tacho not working ) and could not get the hull planning
off to mechanic ,, was told dizzy not advancing .. get new dizzy
back in the shead  , after amber thinking liquid ....grease nipples
test on bay ..... yep fixed plaining ..going hard and fast !  Grin
10 min later it dies  Angry restarts .then dies  row home
weeks of tinkering i book in to another mechanic
i was told ..the timming is way out    need a new dizzy
took it home and pulled bits off to investigate
= the rotor is at lead 1
=the pully arrow on the top ofthe dizzy assembley is alligned with the rotor
=the arrow mates up perfectly with the 2 dots on the fly wheel
=teh number 1 piston is at the BOTTOM of the stroke ( number 2 piston is at tdc)
what he ? whats happened here ?
so i move all the leads around ..hence engine timming is 180 deg out
and the thing starts 
took to water ..idled out then stopped
returned to garage and checked it out again
now everything is  reversed again back 180 deg ! i put leads back  .but now wont start ... timming is good leads right got spark gotfuel Huh
1  how can this happen
i after 1 month of thinking and wraking peoples heads and googling have deduted thet the flywheel must be moving
but then i think the timming marks would move
but if the pulley thet drives the dizzy is fixed to the flywheel then  the timming marks would be correct .
but if the pulley is on the crankshaft ... it would have to move and be out
i so confused ..its been 9 months of crash coarse 2 stroke outboard learning




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