sluggish now wont start

[larrylarry]

Last couple times out seemed sluggish thought I had to much weight in boat.
pulled over to beach and turned off engine,now wont start,everything is good ,meaning battery,gas ,fuses,etc.It wants to crank and wont .Im thinking fuel
pump,which is almost five years old ,time flies.
What do you think? and what part ? looks like over $200 ,or am I missing something and is it fairly easy to do yourself.
Btw,I have F40JEHA
Thanks,
Larry

[larrylarry]

Thanks for responding ,battery connections are good ,I clean fequently,
its getting plenty of juice it wants to start,it just wont

[99yam40]

testing is the best way to go.
Service manual comes in real handy
Compression, spark, timing, and fuel pressures
saying it wants to start but will not does not say much

[TownsendsFJR1300]

What year is it Larry, also is it carbed or Fuel injected?

If you have carbs, start by pulling the drain plugs on the carb bowls and cacthing what comes out(debis water, etc). A small CLEAN tuna fish can, or very small glass container works fine too..

And to be SPECIFIC, it spins over normally, it just does NOT START correct?

[larrylarry]

I have to look but im sure its 09 year ,and yes everything is normal and it
wont start.It wants to turn over.Im not a motor head type guy but I think its fuel injected Im not home to look at it.As I said it felt sluggish running ,off and on thruout the few hours running it that day,and frankly I was think fuel pump because I should have maintenance that .I always have good fuel ,I always put ethanol stabilizer
in the tank,change the water /fuel filter frequent and also the site bowl for the fuel I drain periodically ,good connections at the battery.Fuses are good .never had any problems at all in the five years Ive had it till now.
Thanks for helping,Larry

[TownsendsFJR1300]

Yep, its fuel injected;

2006 and Later F40JEHA_01 Yamaha Outboard INTAKE 2 Diagram and Parts

If you spray just a little bit of starting fluid in the plastic intake runner(water muffs on the lower unit intake with water on) while cranking and it kicks, it'll confirm your NOT getting fuel.

Someone's going to have to chime in about checking fuel pressure (or possible lack of, dirty filters/ injectors, etc)

[rodbolt17]

have the primary ID checked.
there was a tech bulliten about the high pressure fuel pump.
some about that year range had some issues.

[larrylarry]

Thank you I will check it with the starting fluid ,I get it.

[99yam40]

Rod is a Yamaha master tech so pay attention to his posts

[rodbolt17]

who said anything about motor destruction in a can?
is testing/checking that bulliten hard?
low/no fuel rail pressure equals no start or no power.
that bulliten will tell you how to identify if you have the correct pump in the VST.
I have seen 2 of the updated pumps fail so far.

[boscoe99]

It is well and good to spritz a bit of fuel into the air intake to verify if a problem is lack of fuel related but there will still be work needed to determine what is causing the lack of fuel.

If you provide the engine serial number we can see if a technical bulletin was issued for your motor and if so, was the work specified for the bulletin performed.

Cranking is when the starter motor is rotating the flywheel and the crankshaft. Starting is something altogether different. When you say that it wants to start, how do you know? Is it actually starting but not continuing to run or ?

You can pump fuel to the VST manually using the primer ball. But, the electric pump in the VST has to work to provide fuel, at pressure, to the fuel injectors. Has anyone put a pressure gauge on the motor to verify that adequate fuel pressure is available?

[larrylarry]

Thanks for the responses,this my first posting ,sorry if Im not accurate in my
descriptions and may be in over my head,I wanted to try and fix it myself if it was simple enough.
No work has been performed other than plugs ,oil , filters.
The flywheel spins and it starts to pee, but doesnt start.
When it happened I did pump the ball it got hard and stayed hard and it did not
sound like it was pushing gas thru.
Have not put a pressure gauge on it.
I will forward serial number later,
What do you mean "motor destruction in a can"
Thanks,Larry

[boscoe99]

I suspect that he is talking about ether in a can. Used to help get a fuel starved motor to fire.

I don't understand the destruction part.

[TownsendsFJR1300]

Destruction in a can, that's new! A short spritz and all destruction happens.. BS..

If it kicks, with a very short (as I posted) spritz of starter fluid, you just narrowed down the problem. It won't hurt a damn thing..

Its like stating a compression test is useless on a four stroke.. You should just do a leak down test. Again, BS, faster for the professional mechainic to help diagnose and get an idea of the internals, but certainly NOT useless..

Some of us forget we not all full time Yamaha master mechanic's and don't have all the shop tools, etc available to us...

If it was a TWO stroke, a spritz of premix NOT starter fluid would work as well

[larrylarry]

ok,here are the serial number that are on the motor

6 BG S 1011882

Gonna try the starter fluid right now ,real quick to see if it turns over ,Ill be back