Twin 1998, 225 Ocean pro

[hlavery]

I think I have done everything I am able to do, Please give me any ideas you may have.
1 motor runs great.
other motor starts, idle is rough and shuts down, If I keep it running I can bump choke to get to 3 or 4 thousand rpm and ir runs great.

I took all 6 carb s off and cleaned them top to bottom, I switched power pac from other motor and it did not help
compression is about 100 110 in all 6
Plugs are new
Fuel Pump is pumping well
I exchanged all coils from other motor as well and no change
I have checked timing and it is at 4 atdc
I disconected shift switch with no luck
Timing light on each plug wire when running shows spark.
I have factory book and have tried to check everything they suggest.
Please Help

 

[wilde1j]

Re: Twin 1998, 225 Ocean pro

Choke deal points to fuel starvation. I would check along those lines for the bad motor. Have you tried swapping fuel lines between motors?

 

[hlavery]

Re: Twin 1998, 225 Ocean pro

I took a fuel tank with the lins and ball from another outboard that uses same mix and hooked it to the motor. Totally new fuel, mix and line. This did not help.
I still use the VRO pump so double oil was going in but did not make a difference.

 

[wilde1j]

Re: Twin 1998, 225 Ocean pro

Still sounds like a fuel problem.

 

[tx1961whaler]

Re: Twin 1998, 225 Ocean pro

Seems like you have swapped everything over, except the fuel pump. I would double check all of the fuel fittings, clamps and hoses on the bad motor, then I'd swap fuel pumps. Just my 2 cents.

 

[daselbee]

Re: Twin 1998, 225 Ocean pro

Still sounds like a fuel problem.

I thought so too, but if it were a fuel delivery problem, lines, pump, etc, it would not run at 4000 RPM like he says it does.

Sounds like your idle / intermediate circuits in the carbs are fuel restricted or are getting too much air. I know, 6 carbs and you cleaned them....I know. But you are enriching with the primer solenoid, through the RPM range that those carb circuits deliver fuel....

Did you pull the side plates off those carbs when you rebuilt them? Did you remove and examine the intermediate jets? Are all those side plates sealed properly on their gaskets...maybe air leaking there...
Maybe check for air leaks at the manifold, intake areas. (behind the carbs)

 

[wilde1j]

Re: Twin 1998, 225 Ocean pro

The 3 to 4K RPM he talked about is probably in neutral, which means nothing regarding fuel delivery. If it was running at 4K in the water under load, that would be somewhat different, BUT it's a long way from 5800 RPM the motor should be turning.

Still sounds like fuel starvation, whether in the carbs or external.

 

[daselbee]

Re: Twin 1998, 225 Ocean pro

Funny, I got the impression that he was on the water, bumping the primer to get it running in gear up to 4k. He says nothing about 5800, he also did not say that he even tried to get it to 5800...so I am disregarding that.

He needs to post back exactly what the "If I keep it running I can bump choke to get to 3 or 4 thousand rpm and ir runs great.." statement means.

 

[hlavery]

Re: Twin 1998, 225 Ocean pro

Thanks for yor information. I was on the water when I bumped it. I spent hour our two today looking at carbs and fuel pump. Nothing that made a difference. It sure seems like it is caughing at Idle like it is missing. Please let me know if you have any other ideas!

 

[daselbee]

Re: Twin 1998, 225 Ocean pro

What happens if you continuously pump the bulb while it is acting up?
This is a long shot, but maybe the restriction is in the fuel distribution rail that tees off six times to each carb. The plastic jobby.....
Could have some large piece of junk in there....but a long shot.

 

[Fl_Richard]

Re: Twin 1998, 225 Ocean pro

Does it spit fuel out the carb throats or sneeze? Spitting is a sure indication of a reed valve problem. (Been there)

Sneezing is a lean condition at idle. Points to carbs. Pull the drains out of the bowls and pump the ball. Capture the fuel running out. Check for debris. Had the same problem. Cleaned the carbs and had fresh debris plugging the fuel circuit. Flushed the bowls and problems went away.

 

[junior1113]

Re: Twin 1998, 225 Ocean pro

loose magnets on fly wheel? just went through this with my 93' 200. these can be checked with out pulling flywheel. if magnets move at all need to rebuild fly. my 2 cents

 

[jonesg]

Re: Twin 1998, 225 Ocean pro

Cleaning the carbs, whatever that means, isn't quite good enough.

Did you use rebuild kits.?

 

[junior1113]

Re: Twin 1998, 225 Ocean pro

Cleaning the carbs, whatever that means, isn't quite good enough.

Did you use rebuild kits.?

absolutly true good point, needles and seats dont last very long with ethanol
and floats need to be adjusted a lot. with engine off when you pump primer does gas come out of carbs? if so flooding is possible