230 HP OMC Carburetor

There is a difference in the part number from all the like distributors I looked at on line.

I could not find a single one with the part number ending in an A
There are 2548201 numbers but not 2548201A

Once I finish the other tests recommended above I'll see about acquiring a "Marine" distributor.

Tony

Gents,

Thanks for all the help, Here are the numbers off of the brand new Distributor.
2548201H

As far as asking the PO a question. I tried once and was disappointed in the answer, enough said.

I'll check the firing order, and the secondaries. I don't suspect the wires to be crossed as it runs so well, no shaking, easy to start, although it does have that tell tale cough once in a while. Flat Mallory distributor cap. Hate those, had a Ford 427 that used that type of cap. There's a very tiny tin clip inside the cap that comes loose and ruins the cap in short order. That was a long time ago, hopefully they are better now.

What these guys said... and also double check that you don't have two plug wires switched.

Tony,
Regarding the prop, the 12x14 is not "over propping" the engine and not the problem. Get the boat out on the water and check to see if the carb secondary's are opening. I still feel that could be the problem.

What input if any have you gotten from the PO regarding the engine? Was he the one who installed the non original carb and distributor?

adaily wrote: If I install the electronic module (no sparking points) can I expect not to blown up? The boat came with the Mallory module in the box. TONY D

8122pbrainard wrote: Why are you going to the EI conversion?

Tony,
The EI isn't going to fix the stumble nor will it provide any performance gains. Chances are high that the PO didn't want to or didn't know how to set dwell. Some have found that the EI's aren't reliable and others have had good luck with them. Stick with the points for now until you get the stumble fixed.

Thank you for the clarification.
Guessing aside from a possible adjustment the Carburetor is serviceable.
If I install the electronic module (no sparking points) can I expect not to blown up? The boat came with the Mallory module in the box.

Thank you for the help.

TONY D

More pictures. Carb numbers,, Prop. hard to read but maybe enough to make a determination. Distributor.

Tony D

the carb you have is a replacement spreadbore. i would either spend the money for a marine edelbrock 600 , holley or one of the copycat style 600cfm or buy a rebuilt marine rochester quadra jet.. did anyone determine whether or not there are all marine parts on that boat? starter   ,distributor, alternator carb?

If you take a picture of the air horn from the same angle as Gary's picture you should get the list number.

Sure looks to be a 4175 model like I mentioned before (and put the summit link up for) and it has vacuum operated secondaries that will only open as far as the engine load requires unless somebody really messed it up.

A rebuild kit based on the list number is probably around 40 bucks or so and would be worth a try..

If you were going to buy a Rochester I'd use the info that Steve posted

Right now I'm not thinking your problem is the carburetor since it works good at low speeds and up to your max of 3200 rpm unless the secondaries just plain don't open.

They'll only open under load on the water so you'd need the engine box up or off to be able to watch them or move the linkage manually like you previously mentioned.

Give answers to the previous questions when you get them and it'll be helpful

Good job figuring out posting the pictures by the way.

Next we'll have you posting links, it's easier than pictures

We'll let Pete explain that to ya

Lets figure out what you have first Here is where the numbers are that we need. Interesting thing about your carb is that it looks so new. Last owner must have been having issues and finally gave up would be my guess.

The module came with the boat, I haven't decided to install it. That's the least of my issues right now. I do see the recommended carburetors for sale. That seems to be something I should consider. I'm not comfortable with having the wrong size and make on this engine. Most of my experience has been with outboards.

Tony

adaily wrote: It's still set up with points although I do have an electronic module in the box.

Why are you going to the EI conversion?

Interesting,that last picture is not of the carb list number. It is located on the air horn where the choke plate is. That's is why Ken could not find a listing.

Thanks for the pics Tony. Issues with that carb might be far reaching. The correct carb might be in your best interest. Also, is that a prestolite or Mallory distributor? You might want to inspect the guts on that also. a service and parts manual is great to have. On the service manual, look for an original OMC SDL-1092. Parts manual 981296 will cover 990322M but not 990322A. You might have to research a little more for the correct one but I bet their close enough. Steve