cogh, sniffle, sneeze

[hookset]

Boat started with a little cough when at idle, never bogges down and stalls and it goes away when running. I havent really run boat in 1.5 years other then back and forth to slips and just letting motor idle. Fuel is stabilized but sounds like one of the jets in carb may be a little clogged. I have cleaned carbs before on small engines so figured I could do it. As I research it, it sounds as there could be two Carbs on motor. Is this true? Are they independednt from each other, like one on starboard cylinders and one on Port cylinders? Do i need special tools other then basic thin wire for jets, screwdriver, carb cleaner, and compressed air? Is taking carbs off and cleaning over kill for a slight cough that resolves when at higher RPM? should i just put sea foam in a in a gal of fuel and hook fuel line to seafoam gas and run boat at ideal while sea foam runs through?

As a side noted i am going to run compression test prior to doing anything with carb to be sure the problem isnt larger then appears?

[Gerry Zagorski]

First thing I would do is eliminate any issues with the fuel system components on your boat and run it with fresh fuel out of spare tank directly into your engine. If that solves your issues then it's either the fuel you have in you tank or one of fuel components between the engine and the fuel tank.

If this does not solve your issue then you will need to dig deeper.

Yes, outboards, especially the higher horsepower ones hav multiple carbs. I have never rebuilt the but so can't comment on the difficulty. Let us know the make, model, horsepower and year of your engine and maybe someone can be of more assistance.

[hookset]

1996 merc offshore 225

[Bass_Appeal]

hookset your sure u werent using my boat!! lol same motor same frigging problem , but now mine it is alot worse , it will get a burst then bog , then a couple quick burst then bog ....i ran with hood off an seemed a little better but still boggig and bursting ....i squeezed primer ball and got a little more fuel delivered and seemed to be only alittle bit better im at the end of my rope here i replaced alot of stuff and ready to just unbolt it and kick it off the back of the boat ....when it runs good it runs good but when it runs like ,a turd its diarea the only difference is mine is the efi model ,

[hookset]

Hahahaha got to love it!! I want to sell mine but done want to sell a lemon! Trying to figure it out is making me a little crazy! Plan to spend a few hours today with her to see what I can find! I am sure there will be a surprise at every turn!

[Bass_Appeal]

mine always seems fine on land its when u put it under a load and thats when u see all the problems

[hookset]

I did the compression test yesterday and it ok! 100 psi in all 6 cylinders plugs all looked in good shape! Started boat up after test had a little cough while warming up so I gave her some throttle and usual it clears right up! Next will be clean fuel from a can

[Bass_Appeal]

hook , check heres a couple things to check , the if you have a sensor on the fly wheel , look at the teeth of the wheel that the sensor counts to tell the timing . sometimes the paint chips and it throws off the sensor you may need to file it down to be even on all teeth . also check the coil packs and make sure each one is working properly , the best I can tell you is the coughing and sneezing are misses , when firing more throttle you give better spark thus more fuel being burned instead of dumped .

[OS Marine]

Hi...we fix outboards all day long. Call us if we can help you out.

Freddie

[Bass_Appeal]

os-

what do you charge to hook up a computer and give a basic read hrs , faults , ect

[OS Marine]

HI...We normally don't use a computer on them. Theyre pretty simple motors until you get into the Optis/Verados. Most of the time its effed up carbs and rings. Ignition issues are easy to diagnose ie coil packs/timing etc. Bring it by and we can take a look at it. The good news is that that series of motors is pretty good.

Freddie

[Bass_Appeal]

mine is fuel injected , with an efi computer and ignition computer. a computer reader is needed and can tell me faults , how many hours are on the motor , and various things like how long it was ran @ 2k rpm how long @ 5K RPM ....Im looking for a person who can read the technical info off the computers .... dyno can amp the computer give more air to fuel mix and different things to tune it up. at this point I wish I had a carb engine , make things a lot easier

[OS Marine]

Hi,

We don't have a computer for Mercs you should call a Merc dealer. Try John at Heavy Metal in Morgan tell him I sent you hes a Merc guru.

Freddie