Honda 2HP

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Gunfleet

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Well, my brave little honda needs a new carb, I reckon. It fits and farts on fuel and though I've got everything else cleaned up I'm never going to get the main jet out with anything less than a clubhammer. Anyone ever replaced the carb on one? Are they dear? Are they easily available?
 
That's very kind. Unfortunately the clubhammer comment was serious. I have no chance of getting the main out ti check it.
 
Take the carb to an engine rebuild shop or a decent motorbike service shop and get them to put it in the ultrasonic bath. That'll clean it like no other.
 
Will it be a carb jet problem? Honda's are 4 strokes, so oil residue shouldn't be a prob.
I had a Honda 5 HP and it was just a crap tickover. End of.

Got Yamaha , it was great.
 
The Honda does NOT like being left with fuel in the carb. Over time this will evaporate and leave behind a residue, it is this which causes the problem. Advice is to always leave the carb empty, i.e. run out and drain properly if leaving for any length of time. The better solution is use it frequently.
 
second what bobbobin says. Mine gummed up with lack of use over a season, thats why I suggested ultrasonic bath if you cant get the jets out.
 
Replacing the carb on a Honda BF2.0 (1997 version)

I bought a Honda BF2 (longshaft) in 1998 and the drain plug disintegrated though electrolysis in 2001 as did the air bleed screw which just seized up and then its head broke off ..... That meant a new carb (£83+VAT!!!!) The engine cover(s) were stripped off with difficulty and eventually the outer innards revealed themselves. To get the carb off you had to remove everything from and including the fuel tank and in-line filter; the choke bent wire; the throttle bent wire etc. Next problem involved lateral thinking and that was how to get round the last corner to get at the last nut holding the carb to the cylinder block .... It involved blood!

Before I installed the new carb it was stripped down and compared to the old one and there were several significant differences mainly involving changes in metals ie the original 1998 Honda BF2 was NOT marinised ... and the new one still had serious potential electrolysis problems. (I didn't have a problem with taking the main jet out in either carb.)

So, knowing what an electrolytic nightmare the original BF2 was, all the decomposable parts were replaced with handmade more compatible parts and all the incompatible parts that couldn't be remade were coated in Hammerite.

The engine has run continuously, summer and winter, since then with no problems. The only problem was of my own making and I used Keenol grease on the air-bleed screw and it kept on undoing. I now use lithium grease and the screw stays in position.

What really surprises me about Honda is that they produce superb bikes and cars but even after 11 or 12 years of producing 4 stroke outboards they still don't seem to have a clue about what the marine environment can and will do to dissimilar metals.

Anyway, having said that, my Honda BF2 still works a treat: always starts 1st time; makes little noise; only gets washed down once a year and has never had a Honda service etc. I've now got no gripes but I reckon that the 60+ hours and more than a few pennies correcting what Honda didn't get right was time and money well spent - It's a great engine, but just a bit heavy (when compared to the new 2HP 2 strokes - but it idles down to almost zero revs /forums/images/graemlins/smile.gif )

Back to your original question - IMO, it sounds from most of the other replies that you might have got gummiosis .... I don't bother to drain the the carb after each outing, but do mix Redex injector/carb cleaner in the spare can - and that works /forums/images/graemlins/smile.gif
 
Re: Replacing the carb on a Honda BF2.0 (1997 version)

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after 11 or 12 years of producing 4 stroke outboards

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A bit more than that.... been doing them since the 70s!!
 
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Will it be a carb jet problem? Honda's are 4 strokes, so oil residue shouldn't be a prob.
I had a Honda 5 HP and it was just a crap tickover. End of.

Got Yamaha , it was great.

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Very likely indeed. Modern petrols leave a gum behind and the jets in that Honda carb will be very fine. Used to get the same problem on my Norton Commando and that was a much bigger engine with much bigger carbs and jets.

Always turn off the fuel and run the carb dry after use.

Doesnt apply as much to 2 strokes - the oil prevents the same problem. Instead what you get is a very oil rich uncombustable residue left in the carb.
 
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