Fuel starvation on Honda BF5 -any help?

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My 2006 BF5 has started to cut out after 10 mins or so. If I pump the fuel bulb regularly the problem does not occur. Fuel flows fine from the tank to the inlet on the engine (the fuel pump?). Any hints on where I start to look for problems? Is there an impeller in the fuel pump casing which may have failed?
Thanks

Andy
 
Is the fuel connector a proper Honda one or a pattern part?
I had this problem on the same motor and solved it by fitting the Honda connector (not cheap)
 
HiAndDri said:
My 2006 BF5 has started to cut out after 10 mins or so. If I pump the fuel bulb regularly the problem does not occur. Fuel flows fine from the tank to the inlet on the engine (the fuel pump?). Any hints on where I start to look for problems? Is there an impeller in the fuel pump casing which may have failed?
Thanks

Andy
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It might be a defective fuel pump. It is a diaphragm pump. It'll have two little valves inside it but there is no breakdown of it in the parts list so may not be a serviceable item certainly no parts listed (Price for a new pump is $91 in the US)

It might be an air leak into the fuel system anywhere from the tank to the fuel pump. As LS indicates the fuel connector is no 1 suspect. The O ring in it is replaceable. The whole connector is $31 in the US.

Dont know if the "conversion" still holds good but Lakesailor's rule at one time was parts cost the same number of £ in the UK as they do $ in the US
 
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Thanks for replies. This problem started only recently - will a non-Honda connector seal degrade with time? Also, if air leaks in does that mean fuel will leak out if I pressurise the pipework and block the overflow pipe from the carb? Would this be a suitable test for the connector or carb seal?
 
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HiAndDri said:
Thanks for replies. This problem started only recently - will a non-Honda connector seal degrade with time? Also, if air leaks in does that mean fuel will leak out if I pressurise the pipework and block the overflow pipe from the carb? Would this be a suitable test for the connector or carb seal?
Click to expand...

I think the problem with non OEM connectors is that sometimes they are a poor fit. There are of course perfectly good after market parts but a genuine part is usually the best bet ( except Peugeot parts )

It might leak if pressurized but it may not at least noticeably.

You should not see fuel leaking from an overflow on the carb. Any overspill would suggest that the needle valve is not seating properly.
 
VicS said:
I think the problem with non OEM connectors is that sometimes they are a poor fit...
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With the Honda O/B I had, the problem was that even though the connectors seemed to mate properly, the fuel connector on the engine didn't release the self-sealing valve in the non Honda hose connector fully. Only a real Honda hose connector would work properly, per Lakey's experience.

(Got a used connector for a quid :) )
 
I think it is dirt inside your carburettor jet.

Had it several times on my Honda.

Easy job to cure. Dont drop parts overboard.
 
Is it in a well, Andy? If so, I wonder if its the well-known problem with the Honda - that eventually the exhaust gases leak and smother the engine. That was the problem with mine. It worked perfectly off the back of the boat, but not in the well, so I changed it.

HiAndDri said:
My 2006 BF5 has started to cut out after 10 mins or so. If I pump the fuel bulb regularly the problem does not occur. Fuel flows fine from the tank to the inlet on the engine (the fuel pump?). Any hints on where I start to look for problems? Is there an impeller in the fuel pump casing which may have failed?
Thanks

Andy
Click to expand...
 
Monique said:
I think it is dirt inside your carburettor jet.

Had it several times on my Honda.

Easy job to cure. Dont drop parts overboard.
Click to expand...

paulferris1964 said:
Is it in a well, Andy? If so, I wonder if its the well-known problem with the Honda - that eventually the exhaust gases leak and smother the engine. That was the problem with mine. It worked perfectly off the back of the boat, but not in the well, so I changed it.
Click to expand...

How would pumping the primer bulb overcome either of these problems ?
 
Obviously not. It's a fuel supply problem. If it's the connector at fault. Often instead of pumping the bulb, actually pushing the connector onto the motor whilst motoring will overcome the problem. Not a suitable way to carry on, but it does isolate the problem as the connector.


£1 for a connector. Wow. I paid £25 for a new one.
 
Stupid reply really but is the breather on the fuel tank blocked . Ten minutes is what I get with the same engine on the occasion I forgot to open the vent . Only once , Honest .:rolleyes:
 
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