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Honda BF35A rough Idle

B

Bruno Paulo

New member
Hello Guys
I have a Honda Bf35A with the serial BSAG-1000815.
In the last 2 years it starts to have a rough idle. After it goes to idle, it seems to loose the power bit by bit and eventually it will stop working. It seems that is getting worst.
I have cleaned the carbs, but im not an expert is the matter so i leave them as they were and the problem persist.

Can anywone get me a Repair manual for this motor, so I can find out how to properly fine tune and synch the carburator.

I've been reading the forum and I have some ideas of what the problem could be, but the manual would be a great help.

Thanks
 
The best manual going for the carbs is the Honda Carburetor Manual. http://www.boats.net/parts/search/Honda/Outboard Engine/2001/BF90A1 LRTA/CARBURETOR/parts.html

It not only shows you a step by step...how to clean but also, how to balance and how the carbs work.

It does not tell you how to disassemble, like the shop manual.

The settings for the idle mixture screws are 2 1/8 turns out.

The Honda Shop Manual is the best if you are going to do major maintenance on the motor.Stay away from the after market (cheaper ones). The aftermarket manual, sometimes do not have complete are accurate information. https://www.amazon.com/Honda-Marine...s&ie=UTF8&qid=1465602798&sr=1-1&keywords=bf35

Mike
 
Thank's a lot for the help.

I have already clean up the carburator again, and adjust it as well as I can, but the problem persists.

I have read in the forum and normaly when this problem occur somewone always talk about a vacuum problem, and to try using some carbcleanner with the motor running to try to pinpoint were the problem is.

My question is were should I look for it?? In the Gasket that joint the carburator with the cylinder head??? In the gasket of the carburator???

How does the vacumm problem can cause a rough Idle??

My friend mecanic said that the problem is in the cleaning of the carburator, but I alreaddy clean it twice.

Thanks in advance for your help, and sorry for my bad english.
 
And a Information that might help the diagnosis. When I disconect the "Ignition Spark Connection" from the upper Cilinder Is when the motor will work worst, and is really noticible.
 
Remove the spark plug wire, one at a time, from each spark plug while it is idling.

If you remove a wire and the engine speed does not change, then, that is the cylinder that has a problem. That is the carburetor to clean again.

Mike
 
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