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225 Honda - Racor/Fuel Questions

Old 08-13-2019, 06:06 AM
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Default 225 Honda - Racor/Fuel Questions

Early in the summer my starboard Honda 225 would falter above about 3000 rpm, apparently starving for fuel, indicating time to swap out the Racor. Changed it out, problem solved.

A month later, the port engine starts the same. Changed out the Racor, then ran it yesterday. Problem NOT solved - it still starves and falters whenever I run it above about 3100 rpm.


Any thoughts? Do these engines have a second filter under the cowling? It is basically doing the same thing it did before. Will run all day at 3,000 or less, but starves above that, in other words, just like a dirty filter.


Any ideas will be appreciated.

Last edited by Cat-a-holic; 08-13-2019 at 11:15 AM.
Old 08-13-2019, 11:15 AM
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Edit - Bump
Old 08-13-2019, 11:17 AM
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Fuel pump? Check valve on fuel tank? bad primer bulb?
Old 08-13-2019, 01:04 PM
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Originally Posted by iFishMD View Post
Fuel pump? Check valve on fuel tank? bad primer bulb?

Thanks, good ideas.


I wasn't aware of the fuel tank having a check valve, but it makes sense....
Old 08-13-2019, 02:04 PM
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There are two more filters under the Cowling.
Old 08-13-2019, 02:27 PM
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High pressure fuel filter been changed?
Old 08-13-2019, 02:29 PM
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I would change Hi/Lo Speed Fuel Filters, Spark Plugs, and dump new Racor filters to see if any water in there if so get your fuel tank cleaned.
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Old 08-13-2019, 02:30 PM
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Also I have seen the fuel hose running through the rigging tube collapse if pinched.
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Old 08-13-2019, 02:36 PM
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Under the cowling there is a high and low pressure filter and a screen filter under the high pressure fuel pump.
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Old 08-13-2019, 02:41 PM
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High pressure filter no doubt.... its a design issue with these motors and contaminated or slightly contaminated fuel.... change those along with the oring and you are golden
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Old 08-13-2019, 03:03 PM
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Thanks guys. Did not know about the other filters. I am suspecting the other filters first, then look at lines. This is a 2004 engine, and all the lines and filters are likely original.

I would think if there is water in the new racor I could see it in the bowl, correct?
Old 09-22-2019, 06:03 PM
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Originally Posted by jayyy View Post
Under the cowling there is a high and low pressure filter and a screen filter under the high pressure fuel pump.


Changed out fuel filter and water separator under cowling. Easy job. Did not fix problem.



So....my next thought is primer bulb. Just ordered a new one. The old one does not firm up no matter how much pumping.....would that cause my issue?
Old 09-22-2019, 07:32 PM
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If the primer bulb will not get hard, you have an air leak in a line or fitting. If the fuel lines are original since 2004, it might be a good idea to change them.
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Old 09-22-2019, 07:34 PM
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Originally Posted by weatherman View Post
If the primer bulb will not get hard, you have an air leak in a line or fitting. If the fuel lines are original since 2004, it might be a good idea to change them.

What about the bulb itself - could that be the culprit?


I cannot see all of the line, but what I can see still looks good. Not sure if its all original or not.

If replacing the bulb does not do the trick, then I guess replacing the lines would be next.
Old 09-23-2019, 03:08 AM
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When you replaced the Racors did you just replace the filters? We've seen some of the plastic bowels lose their seals over time. One guy at the marina where I store my boat actually had the plastic bowel fall off.
Old 09-23-2019, 04:07 AM
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I've seen plastic bowls fall off as well.
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Old 09-23-2019, 05:14 AM
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If you had that much trash or water in your racors you may have water/trash in your injectors. Change internal filters and if it doesn't resolve the problem remove each plug wire and see if the engine rpm drops or stays the same. If it stays the same that cylinder has an issue. If that is the case you will need to remove the injectors and send them in for cleaning.
Suggestion in the future don't wait until you have a problem to change the racors. Change them at least every year or possibly more often.
Old 09-23-2019, 05:30 AM
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What year is motor ?

VST float/needle is stuck ......
Old 09-23-2019, 05:45 AM
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Originally Posted by Cat-a-holic View Post
Changed out fuel filter and water separator under cowling. Easy job. Did not fix problem.



So....my next thought is primer bulb. Just ordered a new one. The old one does not firm up no matter how much pumping.....would that cause my issue?
how about the high pressure screen? Did you change that one?
Old 09-23-2019, 07:16 AM
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Originally Posted by Cat-a-holic View Post
Early in the summer my starboard Honda 225 would falter above about 3000 rpm, apparently starving for fuel, indicating time to swap out the Racor. Changed it out, problem solved.

A month later, the port engine starts the same. Changed out the Racor, then ran it yesterday. Problem NOT solved - it still starves and falters whenever I run it above about 3100 rpm.


Any thoughts? Do these engines have a second filter under the cowling? It is basically doing the same thing it did before. Will run all day at 3,000 or less, but starves above that, in other words, just like a dirty filter.


Any ideas will be appreciated.
I have the exact same motors as you do. Mine are 2003 with about 1200 hrs on them.

It's the HP fuel pump starting to go out. I replaced my VST in my port motor last year and my starboard motor just started doing it a few weeks ago so I replaced that VST assembly and it is running great now. Here is my post asking the same thing: BF225 Issue

BTW, you can get an aftermarket HP fuel pump for about $200. If you want OEM, they are closer to $500 but an OEM VST assembly that includes everything is about $725 and much easier to replace. Check Boats.net or Down Supply Co on Amazon.

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