idle spiraticaly... force 125 88

hi to everyone!

at full throttle I have no issues revs all the way to 4900 at sounds great

at 1500rpms forward gear im getting like a surge of a 200rpms up down

I have cleaned the cabs very well and adjusted the floats to spec. needle are clean

please help I have 2 days left to get her purring like a kitten before my trip

thank you

mike

Re: idle spiraticaly... force 125 88

Try cleaning the fuel recirculation system.

Re: idle spiraticaly... force 125 88

Try,adjusting the air screws,1 turn out from lightly seated.
Sounds like it might be sucking air?
Try a bit of starter fluid around the different areas of the motor as it idles.
If you spray and it makes a difference in the way it runs??Then it's sucking air.
Check the fuel pump diaphram.

Re: idle spiraticaly... force 125 88

foodfisher said:

Try cleaning the fuel recirculation system.

Click to expand...

where is that?

should I clean it with seafoamed 5 gallon separate fuel source?

Re: idle spiraticaly... force 125 88

jerryjerry05 said:

Try,adjusting the air screws,1 turn out from lightly seated.
Sounds like it might be sucking air?
Try a bit of starter fluid around the different areas of the motor as it idles.
If you spray and it makes a difference in the way it runs??Then it's sucking air.
Check the fuel pump diaphram.

Click to expand...

is there an area you suspect?

Re: idle spiraticaly... force 125 88

fisheymikey said:

where is that?

should I clean it with seafoamed 5 gallon separate fuel source?

Click to expand...

Starboard side of engine, skinny hoses and connections/elbows/screen. Disconnect and clean with carb. cleaner (aerosal). Should remove and inspect behind cover plate also, but a new gasket will be needed. There is are screens and reeds in there. A manual will make your boating experience less frustrating = more pleasurable.

Re: idle spiraticaly... force 125 88

well I think I found the problem!!

my diaphragm is very stretched unbelievable... I am assuming that would cause the fluxuation I was receiving?

never the less im going to purchase the fuel pump kit.

now its trying to find the kit here in quebec is the challenge

when installed ill go see what happens

mike

Re: idle spiraticaly... force 125 88

Just another small thing to check when you pull the fuel pump is the air supply line that comes from the crank case. Even after I rebuilt my pump I still had a rough idle. I found that hose bad(leaking precious air) where it goes onto the engine side. It was a $1.80 fix from autozone

Re: idle spiraticaly... force 125 88

The 88/125, most didn't have the screen and reed setup.
Just a screen.
The air screw,it meters the fuel/air ratio at an idle.
One turn out.Then adjust from ther when the motors warm.
Running and warm.
Turn the air screw in till it bucks and kicks then out about 1/2 turn.
Seafoam gas additive,NO.
There is a spray Seafoam it might have some cleaning ability.
Spraying anything into the fuel recirc system is DANGEROUS.
First most spray cleaners will strip any oil from the bearings,cylinder,rings.
You need to remove the covers and check the screens.
The holding a bill in front of the carb really doesn't tell much.
The carbs are all connected with a hose between each other.