----------- (( apologies for the word count to follow!!))
Engine; Yamaha Sport 50, 2-stroke. L or FL series? from year 1999.
This could be your "cookie cutter" opening to an issue. "I've tried everything! I've done everything right" and "The engine won't start!" Well, pretty much all true. (except all done "right" early on)
-( New, fresh fuel. Properly pre-mixed (*this time)
-( Old fuel flushed from all lines and
-( .. drained from carburetors
-( plugs appear in great shape, and not fouled
-( spark verified visually/externally, for each plug
-( plug wires verified by use of timing light
-( almost forgot!.... I tried going thru several steps derived from differing methods in adjusting the
an engine's timing, and specific to Yamaha engines. I hoped to at least confirm or not,
whether my engine timing was as close to correct as possible. Some were just plain
hard to make sense of (not only by myself), but more on this below.
My usually easy-to-start outboard engine now- despite all efforts- won't even 'burp', or fart
..sorry) Of course there's a back-story, which you'll need to know. And I'm a bit ashamed to admit.
Earlier this week I set out to start the engine for the first time since 'fogging' it, knowing to expectsome smoking at first. After a bit more difficulty to start. After so many tries, I realized
that the safety lanyard wasn't attached. First mistake, but no real harm done. Once that was done, the ol' Yamster
(ugh) started on first turn of the key!
However, it roared to life at an RPM I would've never chosen to start out. Not even after
warm-up but for a brief time. Moving the throttle lever had no effect at all! Excess fuel in carbs after all the startup failures? But .... after 10 seconds or so, it came to a screeching halt.
No rough running as if it was running out of gas. Not too much time passed before ...
I realized that I'd forgotten to add oil to the new gas in the tank! Ouch. Wouldn't most of you thinkthe same that I did, that it had seized up? After correcting my second and much worse mistake, I searched and found methods to "un-seize" an engine. Simple enough- tilt the motor
as close to horizontal possible. Fill the the cylinders with 2-stroke oil (option I went with). After
a short time, Not days, as suggested, I used a breaker bar with socket to fit the large nut atop
the rotor plate, magneto etc, and prepared for a struggle to rotate the crankcase and all. Well,
.... That turned out to be easy-peasy. No effort at all!? I turned it fully around clockwise,
then also counter-clockwise. A 3rd mistake? I saw that done in each and every Youtube
viewed on this issue. By the way, as I was filling the no. 3 cylinder I found it would never fill!? Then, it began to spill out of the prop area. This wasn't supposed to happen until the engine
was back to vertical. Could the oil have found it's way into the carbs? I've not yet done the draining of the carbs to find out, but continued to believe it wasn't so, since smelling fuel
after all attempts to start the engine. As if in a flooding scenario.
Gotta end this, I know. So, I'll close by saying that the attempts at confirming the timing
was correct, and proceeding with steps to adjust timing were all failures. Had hoped to at least see something have an effect in altering current settings, following several procedures. Did
that initial, revved up but brief running do some harm that isn't obvious? To me, anyways ....
HELP me if you can, please!
Engine; Yamaha Sport 50, 2-stroke. L or FL series? from year 1999.
This could be your "cookie cutter" opening to an issue. "I've tried everything! I've done everything right" and "The engine won't start!" Well, pretty much all true. (except all done "right" early on)
-( New, fresh fuel. Properly pre-mixed (*this time)
-( Old fuel flushed from all lines and
-( .. drained from carburetors
-( plugs appear in great shape, and not fouled
-( spark verified visually/externally, for each plug
-( plug wires verified by use of timing light
-( almost forgot!.... I tried going thru several steps derived from differing methods in adjusting the
an engine's timing, and specific to Yamaha engines. I hoped to at least confirm or not,
whether my engine timing was as close to correct as possible. Some were just plain
hard to make sense of (not only by myself), but more on this below.
My usually easy-to-start outboard engine now- despite all efforts- won't even 'burp', or fart
..sorry) Of course there's a back-story, which you'll need to know. And I'm a bit ashamed to admit. Earlier this week I set out to start the engine for the first time since 'fogging' it, knowing to expectsome smoking at first. After a bit more difficulty to start. After so many tries, I realized
that the safety lanyard wasn't attached. First mistake, but no real harm done. Once that was done, the ol' Yamster
(ugh) started on first turn of the key!
However, it roared to life at an RPM I would've never chosen to start out. Not even after
warm-up but for a brief time. Moving the throttle lever had no effect at all! Excess fuel in carbs after all the startup failures? But .... after 10 seconds or so, it came to a screeching halt.
No rough running as if it was running out of gas. Not too much time passed before ...
I realized that I'd forgotten to add oil to the new gas in the tank! Ouch. Wouldn't most of you thinkthe same that I did, that it had seized up? After correcting my second and much worse mistake, I searched and found methods to "un-seize" an engine. Simple enough- tilt the motor
as close to horizontal possible. Fill the the cylinders with 2-stroke oil (option I went with). After
a short time, Not days, as suggested, I used a breaker bar with socket to fit the large nut atop
the rotor plate, magneto etc, and prepared for a struggle to rotate the crankcase and all. Well,
.... That turned out to be easy-peasy. No effort at all!? I turned it fully around clockwise,
then also counter-clockwise. A 3rd mistake? I saw that done in each and every Youtube
viewed on this issue. By the way, as I was filling the no. 3 cylinder I found it would never fill!? Then, it began to spill out of the prop area. This wasn't supposed to happen until the engine
was back to vertical. Could the oil have found it's way into the carbs? I've not yet done the draining of the carbs to find out, but continued to believe it wasn't so, since smelling fuel
after all attempts to start the engine. As if in a flooding scenario.
Gotta end this, I know. So, I'll close by saying that the attempts at confirming the timing
was correct, and proceeding with steps to adjust timing were all failures. Had hoped to at least see something have an effect in altering current settings, following several procedures. Did
that initial, revved up but brief running do some harm that isn't obvious? To me, anyways ....
HELP me if you can, please!
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