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Old 10 September 2016, 05:26   #1
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Honda BF250 Fuel Problem

Hi
I have a 2013 BF250.
I've had similar issue before with BF130's but need advice if someone has had same issue.
At high revs (above 4000) the engine stutters and holds back / limits itself etc. Seems to be a fuel starvation issue.
Previously on my BF130's it came down to a wee gauze filter in the HP fuel pump being block and i assume it is the same now but getting to the HP fuel pump is a nightmare.
I have changed all fuel; renewed all filters; drained all reservoirs and separators. Clean pure fuel flows to the rails so all i can think is that it is the HP pump gauze again.........???
Does anyone know where i could locate a copy of the workshop manual to help me gain access to the HP fuel pump?
Any other advice more than welcome..........(i live in the highlands and access to a Honda engineer is difficult and rather !!!)
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Old 10 September 2016, 05:42   #2
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It could be a restriction in your boats fuel system. The normal way to tell would be to perform vacuum tests in line with manufacturers recommendation. You will also need the appropriate test gauge set up to do this.

Its worth ensuring you have no restrictions as this can cause a lean running engine that would cause damage to cylinders and pistons.

Fuel tank switchover valves, tight bends in fuel lines, pinched fuel lines, anti siphon valves on the tank breather can all be culprits.
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Old 10 September 2016, 06:46   #3
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Sure it's a Fuel issue? When were the plugs and leads last changed?
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Old 10 September 2016, 12:41   #4
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Get it to 4000 revs and then get someone to pump the bulb. If it's fuel starvation you may be able to prove it like that


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Old 10 September 2016, 12:51   #5
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All thx
Plugs were changed post initial issue / signs (as i had a spare set of iridiums) - didn't improve.
Also tried the "pump the priming bulb" and no change.
Managed to remove the HP pump this pm with a mate. Felt like major surgery!
Deposits all over inside the pump incl rust! not good.
Cleaned everything just can't remove pump from housing to get to the micro filter.
Will clean from inbound side and if weather ok will trial run sunday pm after rebuild.
Thx for advice so far chaps - any further advice welcome!!
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Old 10 September 2016, 12:59   #6
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its a pity you weren't closer I've got the seloc manual that covers all hondas up to 250hp fuel injected
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Old 10 September 2016, 14:14   #7
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Why don't you fit a spin-on/racor type filter in your fuel line. If this is the same boat it's looking like you could have a tank issue
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Old 11 September 2016, 06:10   #8
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Country: UK - Scotland
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Found BF225 manual online which seems to have same set up. Also found a US forum with some gauze issue. Have managed to get HP pump out of housing and clean up gauze.
i have a honda in line filter separator, new filter fitted now. All tanks flushed and stabiliser added.
Now the fun of putting the fuel system back in!!
Will post if issue sorts itself.
Thx for advice so far all.
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