Tips for servicing a Honda BF2D outboard

bbradb said:
I also have a Honda BF2D. 2 HP Outboard. Having a bit of a problem Perhaps someone has advice. Motor sat for several years. Decided to resurrect. Not surprisingly, the engine did not want to start. Most likely gas left in tank and carburetor. Decided best course would be to remove carb and attempt to clean. Did, unsuccessfully. Attempted to remove main jet and essentially ruined carb as it wouldn't budge. Purchased new honda carb after carefully determining part number. Installed new carb. Carefully drained tank and verified that tank filter was clear. Refueled with fresh gas. Changed spark plug with correct replacement.

After reassembly engine started on first pull with choke out. After choke in, the idle seemed somewhat rough but engine may not have been fully warmed up. The current issue is that the engine has a very distinct hesitation at higher RPMs. Engine is installed in a barrel of water so conditions are nearly as if on the lake. What is causing the hesitation or lag at higher RPMs? I am certain that gas flow is good. I have drained tank a couple of times through float bowl. I have considered buying another carb for $80 but why wouldn't new carb be good? I am certain that Honda put it on a jig to set it up properly. I did fiddle with the idle jet which only had about an 1/8 of an inch adjustment but that didn't help hesitation while reving engine.

What else could it be? Any suggestions would be appreciated. Oil level good. Not overfilled. I'm wondering about valve adjustment. Any thoughts on that. I originally bought motor used and never really gave it a good test. Perhaps it wasn't right early on? Could valves not closing properly cause higher RPM hesitation? What next anyone. Thanks for reading.
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A misfire at high revs could be an ignition problem. I doubt whether another new carb would solve it. Check that there are is no corrosion or deterioration in any of the ignition cables or components. Perhaps try spraying WD40 on the electrics to see if that makes a difference before you decide whether to replace components.

Richard
 
bbradb said:
I also have a Honda BF2D. 2 HP Outboard. Having a bit of a problem Perhaps someone has advice. Motor sat for several years. Decided to resurrect. Not surprisingly, the engine did not want to start. Most likely gas left in tank and carburetor. Decided best course would be to remove carb and attempt to clean. Did, unsuccessfully. Attempted to remove main jet and essentially ruined carb as it wouldn't budge. Purchased new honda carb after carefully determining part number. Installed new carb. Carefully drained tank and verified that tank filter was clear. Refueled with fresh gas. Changed spark plug with correct replacement.

After reassembly engine started on first pull with choke out. After choke in, the idle seemed somewhat rough but engine may not have been fully warmed up. The current issue is that the engine has a very distinct hesitation at higher RPMs. Engine is installed in a barrel of water so conditions are nearly as if on the lake. What is causing the hesitation or lag at higher RPMs? I am certain that gas flow is good. I have drained tank a couple of times through float bowl. I have considered buying another carb for $80 but why wouldn't new carb be good? I am certain that Honda put it on a jig to set it up properly. I did fiddle with the idle jet which only had about an 1/8 of an inch adjustment but that didn't help hesitation while reving engine.

What else could it be? Any suggestions would be appreciated. Oil level good. Not overfilled. I'm wondering about valve adjustment. Any thoughts on that. I originally bought motor used and never really gave it a good test. Perhaps it wasn't right early on? Could valves not closing properly cause higher RPM hesitation? What next anyone. Thanks for reading.
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You have resurrected and hijacked a 4 year old thread.

You would be more likely to attract more replies if you started a brand new one of your own ..... people dont like reading half way through an old thread before realizing its an old one

The person you need to attract is Steve66 ( aka Steve Evans of Evans Marine) who is the forum expert on these small Hondas

Don't spend money on parts before diagnosing the problem ....

Check the valve clearances by all means, try a new plug and check the strength of the spark ... It ought to be strong enough to jump a 3/8" gap


I assume you have the owners manual or have down loaded one from Honda's website

You will find the Sevice manual at Boatinfo - Honda Service Manual for BF2D it might be useful
 
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Thanks for resurrecting this thread.. I was about to start a new one .....plenty of info here to get me started... I have an identical engine which I bought on a whim a few years ago...

Used it a few times refused to work last year.. now needs servicing and new drain plug..

I wonder is a twist throttle available for these engines...?
 
bbradb said:
I also have a Honda BF2D. 2 HP Outboard. Having a bit of a problem Perhaps someone has advice. Motor sat for several years. Decided to resurrect. Not surprisingly, the engine did not want to start. Most likely gas left in tank and carburetor. Decided best course would be to remove carb and attempt to clean. Did, unsuccessfully. Attempted to remove main jet and essentially ruined carb as it wouldn't budge. Purchased new honda carb after carefully determining part number. Installed new carb. Carefully drained tank and verified that tank filter was clear. Refueled with fresh gas. Changed spark plug with correct replacement.

After reassembly engine started on first pull with choke out. After choke in, the idle seemed somewhat rough but engine may not have been fully warmed up. The current issue is that the engine has a very distinct hesitation at higher RPMs. Engine is installed in a barrel of water so conditions are nearly as if on the lake. What is causing the hesitation or lag at higher RPMs? I am certain that gas flow is good. I have drained tank a couple of times through float bowl. I have considered buying another carb for $80 but why wouldn't new carb be good? I am certain that Honda put it on a jig to set it up properly. I did fiddle with the idle jet which only had about an 1/8 of an inch adjustment but that didn't help hesitation while reving engine.

What else could it be? Any suggestions would be appreciated. Oil level good. Not overfilled. I'm wondering about valve adjustment. Any thoughts on that. I originally bought motor used and never really gave it a good test. Perhaps it wasn't right early on? Could valves not closing properly cause higher RPM hesitation? What next anyone. Thanks for reading.
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Hi, will try to answer your questions, I am guessing as you used a part number the carburettor is a genuine honda? Carbs tend to be sealed due to emission regulations and should bolt on and go with little tuning.
Hesitation is usually down to a lean mix. You usually see i just after 1/3 throttle. Try running the engine with the choke half out. if that cures it its running lean. As its a new carb you can more or less rule out jetting. Did you replace the carb to inlet gasket?
Another usual problem is a vacuum leak between engine block, carb isolator block and carb mounting plate. Unbolt the mounting plate and smear gasket sealer/ silicone sealant to the inlet manifold, carb isolator and inner surface of the carb mounting plate. Do not use silicone to the exterior surface where the carb bolts onto the plate!!!
The valves do need adjusting, Honda recommend a valve adjustment at every major service, I adjust all of mine as a matter of course and 99.9% of engines i have , have never had the rocker box off!
Coils can break down but are usually reliable.
Hope this helps
 
pandos said:
Thanks for resurrecting this thread.. I was about to start a new one .....plenty of info here to get me started... I have an identical engine which I bought on a whim a few years ago...

Used it a few times refused to work last year.. now needs servicing and new drain plug..

I wonder is a twist throttle available for these engines...?
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Hi ,I think your engine may be a BF2a but puzzled to know what you mean by a drain plug. BF2a s don't have an oil drain but does have a carb drain. these engines in the past using a l
I have converted to tiller throttle these engines in the past, you will need tiller , twist grip, all cables and cable connector , bracket and swivel connections from a later BF2d or 2.3hp. Its doable but not straightforward. I would concentrate on getting it running correctly before converting.
 
steve66 said:
Hi ,I think your engine may be a BF2a but puzzled to know what you mean by a drain plug. BF2a s don't have an oil drain but does have a carb drain. these engines in the past using a l
I have converted to tiller throttle these engines in the past, you will need tiller , twist grip, all cables and cable connector , bracket and swivel connections from a later BF2d or 2.3hp. Its doable but not straightforward. I would concentrate on getting it running correctly before converting.
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Thanks for that. Yes it's the carb drain that was sheared I have taken it apart and will probably put it back together tomorrow... I presume these can be had....

I agree with the advice to get it going before looking at twist grip... It is a 1997 engine so probably not worth spending any real money on it.
 
pandos said:
Thanks for that. Yes it's the carb drain that was sheared I have taken it apart and will probably put it back together tomorrow... I presume these can be had....

I agree with the advice to get it going before looking at twist grip... It is a 1997 engine so probably not worth spending any real money on it.
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Unfortunately a lot of these spares for early 2as are no longer manufactured, including carburettors. The majority of carbs on these engines have corroded like yours. I do have 1 in stock . The later carbs have a different fuel inlet and will not fit your engine.
 
steve66 said:
Unfortunately a lot of these spares for early 2as are no longer manufactured, including carburettors. The majority of carbs on these engines have corroded like yours. I do have 1 in stock . The later carbs have a different fuel inlet and will not fit your engine.
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I took it apart and it seems pretty ok. Bit of corrosion in base of bowl and one sheared off bolt in the casing..
It will be midweek before I get to clean and reassemble but I feel encouraged...if it runs ok I'll drill and tap the old drain-plug if none available..
 
I wouldnt recommend drilling the carb body, its zinc and if corrosion has already started to set in you stand a good chance of the rest of it breaking away. There isnt a lot of meat on them as new. If you do manage to drill it out and tap it I think you may find it will break when tightening the fuel bowl. I have tried many ways of trying to rebuild the base of the fuel pick up tube but have never been successful.
Good luck with it
 
steve66 said:
I wouldnt recommend drilling the carb body, its zinc and if corrosion has already started to set in you stand a good chance of the rest of it breaking away. There isnt a lot of meat on them as new. If you do manage to drill it out and tap it I think you may find it will break when tightening the fuel bowl. I have tried many ways of trying to rebuild the base of the fuel pick up tube but have never been successful.
Good luck with it
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It is the drain plug I intend to tap. There is only one hole in the carb through this is a hollow hex shaped plug , threaded internally for a drain plug which has sheared and threaded externally on the top which passes through the bowl and holds it in place...
 
Steve66 is a legend. My Honda has run like a dream since he sent back the carb. I usually like doing everything myself - the best decision I made was sending my carb off to Steve, who expertly breathed new life into it and got it working like new. I have no affiliation to Steve, I am just a happy, relieved, customer of his with a very reliable and now trustworthy Honda.

Suggest you do the same and send it off.
 
pandos said:
It is the drain plug I intend to tap. There is only one hole in the carb through this is a hollow hex shaped plug , threaded internally for a drain plug which has sheared and threaded externally on the top which passes through the bowl and holds it in place...
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Ahhh gotcha. The securing drain and fastening bolt!!.
I have lots of the bowls and drains for sale on ebay or happy to list on the classified ads here with a bit of YBW discount if your interested?. Usually retail for £10 +£2.80 post . Will do them for £10 inc post if your interested?
 
MagicalArmchair said:
Steve66 is a legend. My Honda has run like a dream since he sent back the carb. I usually like doing everything myself - the best decision I made was sending my carb off to Steve, who expertly breathed new life into it and got it working like new. I have no affiliation to Steve, I am just a happy, relieved, customer of his with a very reliable and now trustworthy Honda.

Suggest you do the same and send it off.
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Definitely not legend!!! just a Black Country grease monkey with an affinity for little Hondas. Thanks for the compliment though!
 
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