Sneeze, Cough, Whatever...

[Jason2tpa]

No prob, I'm almost positive the name your using "top carb sync screw" is what yamaha refers to as the "throttle lever screw", which is located on top carb. Appreciate all your responses.

And get yourself a new phone man, it's 2017! I've got like 3 old iPhones stacked up in my drawer, one with your name all over it.

[rodbolt17]

would not know how to use it.

I am the caveman.

[99yam40]

my machine does not open thumbnails.
like my cell phone it is about 9 yrs old.
in fact AT&T cut me off yesterday.
they no longer support 2G tech I guess, that is what they said at AT&T.
tomorrow I will be at the Verizon store.

I have a star trek communicator

Rod I too have a flip phone still.
Boost mobile pay as you go plan
put $20 on it every 90 days and pay 20 cents a minute I think. Less than $7 a month, and $ carries over until I fail to reup it in the 90
Have it mainly to be able to call from out in the bay if something happens and I need to communicate from out there. gets fairly good reception out were I normally go while most other carriers do not

they say if I miss loading it up before that 90 days are over, I will loose the plan I am on and the money I have left.
and then have to find a different one that will cost me a lot more I am sure.
I do not even keep it on me most of the time it is in my truck or boat incase I need it, not for others to call me.

[rodbolt17]

my doplganger?

at the moment my phone is in the truck on the charger.
not real sure why other than I got tired of the beep beep.

tomorrow I will go to the local Verizon store.
yesterday I went to the local AT&T store and they said I had to go to a corperate store.
that is a 2 hour drive.

I don't need a super phone with a million or so pixel zoom and wifi.
\
I simply need a communicator.

[Jason2tpa]

my doplganger?

at the moment my phone is in the truck on the charger.
not real sure why other than I got tired of the beep beep.

tomorrow I will go to the local Verizon store.
yesterday I went to the local AT&T store and they said I had to go to a corperate store.
that is a 2 hour drive.

I don't need a super phone with a million or so pixel zoom and wifi.
\
I simply need a communicator.

CB radios are probably still used.

[rodbolt17]

I still have a Johnson

[Jason2tpa]

to CORRECTLY sync the butterballs dohickys shutters or what the ell ever means disconnecting the oil link,discconecting the throttle cam.
back off the idle screw until it no longer contacks the stopper,loosen the top carb sync screw loosen the cam roller screw and make sure both shutters are fully closed without the idle screw hitting the stopper.
now would be a good time to check the oil pump link rod adjustment.
then tighten the upper screw.
turn the idle screw down about 2-21/2 turns after it contacts the stopper.start the engine,adjust the idle speed to about 750.
shut it off.
connect the cam link.
move the cam roller to the correct position,this assumes idle timing is correct.
tighten the roller so it does not touch the cam but is close.
now start the engine move the throttle until the cam picks up the roller.
check pickup timing.
adjust the roller or the cam as nessasary.
the book calls for 4*ATDC plus or minus 1.
I like 3* atc-1*ATC.
we find it accelerates a tad smoother.
but all this is in your service manual.

In the manual it states to align the mark on cam to the center of throttle roller. But it doesn't mention anything about keeping roller close yet off the cam. Just curious why you do this verses having roller touch the cam as the manual implies.

[Jason2tpa]

It just occurred to me that after I bought the boat/motor I went to check the ignition timing along with the other timing/sync checks.

The manual states to check ignition timing, turn magneto control lever so that it contacts the full advance contact screw. At the time the lever was positioned against the retard screw. So I made an attempt to move lever, but it was feeling like I'd have to force it. Perhaps it requires muscling, but I wasn't sure so I actually skipped checking this timing step. Just now remembered.

So whether moving the lever to advance or retard, is it normal to muscle it? I have no idea the force required to overcome the tension when moving the magneto. Thanks.

[rodbolt17]

you have 3 ign timing points.
idle
pick up
WOT.
idle timing is the screw on the mag control lever.

pickup is where the throttle cam picks up the roller.

WOT is the one that stops further movement of the mag lever.

[99yam40]

So I made an attempt to move lever, but it was feeling like I'd have to force it. Perhaps it requires muscling, but I wasn't sure so I actually skipped checking this timing step. Just now remembered.

So whether moving the lever to advance or retard, is it normal to muscle it? I have no idea the force required to overcome the tension when moving the magneto. Thanks.

posting to just bring this question back up since it was not responded to by Rodbolt.

I myself have never even looked at that motor so I cannot say how much force is required to move it, but if the throttle linkage needs to move it along with the carb linkage when you move the throttle , I would not think it would take much force to move the magneto.
was it still hooked up to the other linkage at the time you tried to move it?

[TownsendsFJR1300]

I would not think it would take much force to move the magneto.
was it still hooked up to the other linkage at the time you tried to move it?

That sounds VERY logical. what ever force the engine linkage is providing is what is needed.


As a side note, my first 70HP Johnson (late 1970's-triple, inline) had an idle issue similar to yours but would stall. Didn't have a manual, was very un-aware of that adjustment (the lever stops). I did mess with it (haphazardly) and never had a steady idle. Always wondered, NOW I know...

[boscoe99]

there are no lead bb's for accessing the fuel passage on that 115.
what the tech bulliten says is hook up a water supply to the inlet,hold the carb upside down and turn on the water.
look for equal flow from the needle seats.
however if you tilt the carb any direction it tends too change the pattern.
if your carbs do not have the clean out port it can be added with the kit from Yamaha.
mostly a waste of time in my opinion.

[rodbolt17]

Boscoe
how many times have you actually done that test?

I did it once just to see.

and that was probably 15-18 yrs ago.

I may have done 1 or 2 V carbs since then.

[boscoe99]

Boscoe
how many times have you actually done that test?

Never have done it.

[walleye1]

I do a few a year, we have a lot of that old stuff up here.
Good engines but carbs suck at times.