Honda BF30 auto enrichment

MrBassie

Recruit
Joined
May 26, 2008
Messages
2
This is my first topic here, like the forum :). Discovered this while searching Google for the problem I have with my Honda BF30 '05 outboard motor.

I have, as said, a manual start Honda BF30 outboard. The problem is that, when cold or not used in a while (say 30 minutes), starting is very hard. I must pull the recoil starter grip at least 10 - 15 times before the engine gives a cough. Then pulling 3 - 5 times again will start the engine. The plugs got sparks and I used the primer bulb until it's firm, so it seems that my outboard just doesn't use the choke when it's cold, or won't get any fuel. It's got an so-called auto enrichment system.

One weird thing is that, when at WOT the throttle is turned to neutral, the engine won't stop immediately but keeps running at a certain speed for a while (1 - 2 seconds). Annoying and dangerous! After some research under the hood I discovered that some kind of piston is keeping my throttle open. The piston (in aluminum housing left of the carburetors) is connected to a non-return valve with one blue and one red dot on it. The valve is connected to a copper-colored rail which is connected to the three carburetors. Due to this valve the piston can go up freely but won't fall down easily, holding the throttle open. Is this normal? What is this copper rail connected to the carburetors? Has is something to do with the auto-enrichment not working properly?


Have this problem since I bought it by the local dealer, but he can't find the problem - because of previous experiences with him I prefer to fix this problem myself.

My starting procedure is as follows:
- Set everything to neutral
- Use primer bulb until firm
- Pull recoil starter grip until engine starts

Please help! It's quite a shame when starting this engine in a crowded environment with old-but-easy-starting-engines :(

Thanks! :D
 

JUSTINTIME

Captain
Joined
Sep 2, 2006
Messages
3,284
Re: Honda BF30 auto enrichment

that is called your dash pot
buy a factory manual
 

zzzzz

Lieutenant Junior Grade
Joined
Jan 13, 2003
Messages
1,094
Re: Honda BF30 auto enrichment

the auto-enrichener(Honda calls it a by-starter) is on the top carb-white plastic-top right side as facing the carbs...seen some of the earlier ones go bad or have hard start issues...part # 16130-ZW2-H01...$27.40 :cool:
 

zzzzz

Lieutenant Junior Grade
Joined
Jan 13, 2003
Messages
1,094
Re: Honda BF30 auto enrichment

Just looked at the Honda dealer net...Service Bulletin #60 - May '07...30hp hard start - your motor falls right in that serial # group - tell your dealer to look into it :cool:
 

Palssonater

Seaman
Joined
Jul 3, 2007
Messages
60
Re: Honda BF30 auto enrichment

This sounds like my father-in-laws motor. Almost to a tee, the same problem. Could someone post this Service Bulletin?
 
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