Fuel delivery or stator?

[johnstonjohnr]

I recently purchased a 1987 17' Bayliner with a US Marine 85hp outboard. I have completely gone through the fuel system and replaced everything. New diaphragm, gas lines and replaced all clamps. We went out on the lake yesterday, had a hard time getting it started but got it going. Had to use some starting fluid. Could not get it going very fast, seemed to be starving for fuel. At least that what it sounded like to me. Once it got to a certain point I could not give it anymore throttle or it would stall out. As long as I was giving it starting fluid it would run wide open and actually came up on plane. The people I bought it from had said they thought the stator needed to be replaced. My question is there a tell tale way to figure out if it is the stator is bad or if I am just missing something in the fuel system. We ran it yesterday for about 3 hours on the lake just riding around slowly with no problems. I have pulled all the carb bowls and they were very clean. Oh yah, the motor sat for at least 12 years until I got it. Running clean perfectly mixed non-ethanol fuel. Have good spark and new plugs. I am new to outboard motors and boating in general, but am looking forward to learning from everyone here. Thank you in advance for any help and input.
Here is a short video of it running, Sounds good at this speed.

http://www.youtube.com/watch?v=uf7qt7ffOAQ

 

[pnwboat]

Re: Fuel delivery or stator?

1. Does the primer bulb get nice and firm when you squeeze it 4 or 5 times with the motor off and sitting level as in the normal running position? If not, then you may have a needle valve in the carb that is leaking. Also need to check to see that the float level is correct. If it's too low, it'll starve the motor of fuel. Also make sure the primer bulb itself is not causing a problem. There's a one-way check valve in the primer bulb that can stick and cause a fuel restriction.

2. Does squeezing the primer bulb while running help get the motor up to speed? If so, there's 3 one-way check valves in the fuel pump itself that are known to stick and reduce the fuel flow to the motor.

3. If you have an built in tank, make sure the tank vent line is not plugged. You can test by simply removing the gas cap.

4. To check the stator, you need to measure the resistance across the Blue and Yellow stator wires. It should be 680 - 850 OHMs.

 

[jerryjerry05]

Re: Fuel delivery or stator?

Do a compression/spark test.
Then the fuel checks PNWBOAT requests.
Post your results.

 

[johnstonjohnr]

Re: Fuel delivery or stator?

Primer bulb pumps up firm and stays hard while running.

I did try squeezing the bulb when trying to go faster and did not make any difference.

Using an external tank, clean and good.

How would I check to see if float is set correctly?

Had a compression test done and was told from top to bottom was: (I don't know what is 1, 2 or 3)
top: 126
middle: 124
bottom: 127

Have good spark on all 3 (just ask my son, HEHE) forgot to mention that part to him. But really there is good bright blue spark on all 3.

 

[johnstonjohnr]

Re: Fuel delivery or stator?

if it is the stator is this what i am looking for?

CDI Electronics 176-3095 Force Stator 300-888793
$148 online

663095-1 - 663095-2 - 663095-3 - 663095-4 - A Leader in the Marine Industry CDI Part #: 176-3095 Replaces Part #s: 300-888793 - 663095-1 - 663095-2 - 663095-3 - 663095-4

 

[roscoe]

Re: Fuel delivery or stator?

The stator is the source for the current that produces your spark. You have spark.
It follows that the stator is good.

This certainly sounds like a carb problem to me.
Fuel pump sounds good, but it never hurts to check.

Check that fuel is getting from the pump to the carb.
That the carbs fill.
That they don't leak fuel.
Check that the carbs are tight to the intake, and not sucking air from there.

How do the sparkplugs look?
Is fuel getting to all three cylinders?
Stop running the motor till you are absolutely positive that fuel (and oil) is getting to all three.

If everything else checks out, rebuild the carbs.

Absolutely NO MORE starting fluid ! It has no oil in it and will strip the oil out of the motor.

 

[foodfisher]

Re: Fuel delivery or stator?

^^ Agreed, since it runs on starter fluid, the prob. is fuel related. Use fuel mix in a squirt/spray bottle instead.

 

[bentle]

Re: Fuel delivery or stator?

Also verify that the carbs inner butterflies are opening up all the way.
At the start of the forum page there is a sticky which has a link and sink by FrankA.
Doing this will get the carbs in proper sink.
Can you verify that the timing is advancing while pushing throttle forward? This sits just under
The flywheel.

 

[johnstonjohnr]

Re: Fuel delivery or stator?

Well, I have now changed the stator and installed an electric fuel pump. Have not had a chance to take it to the lake yet. Ran it in the driveway and all seemed go well. I do not like to run at any high RPM's when only using the muff's for water supply, but I did take it up pass where it would cut out before and it seemed to hold for about 20 sec until I shut it down. I guess tomorrow will tell!!!! I've got my fingers, toes and eyes crossed.

 

[johnstonjohnr]

Re: Fuel delivery or stator?

I finally got it...Carbs rebuilt (my first time) holds at wide open throttle at around 33-34 according to gps and speedo. Takes off with a hole shot with no problem. I so happy . Ran the whole lake at wot and no problems.

 

[foodfisher]

Re: Fuel delivery or stator?

Missed the shot of the smile on your face

 

[johnstonjohnr]

Re: Fuel delivery or stator?

Missed the shot of the smile on your face

I assure you it was from ear to ear!!!

 

[jerryjerry05]

Re: Fuel delivery or stator?

Now get rid of the electric fuel pump.VERY DANGEROUS!!
Most are just a bomb waiting to go off.
It's probably not a marine pump either.
The reason they don't install them is they usually have too much pressure.
You only need 1-3# and they work as long as the key is on.
The original works only when the motor runs.

 

[johnstonjohnr]

Re: Fuel delivery or stator?

Now get rid of the electric fuel pump.VERY DANGEROUS!!
Most are just a bomb waiting to go off.
It's probably not a marine pump either.
The reason they don't install them is they usually have too much pressure.
You only need 1-3# and they work as long as the key is on.
The original works only when the motor runs.

Yes sir I agree... I forgot to mention electric fuel pump has been removed and the motor is running with it's own fuel pump. The electric pump was used temporarily to eliminate a possible problem.