[RookieHook]

Through reading many listings on this site, I have tenatively concluded that my fuel flow is being restricted. I have an OB Evinrude OceanPro 225. Boat is a 198? 22 foot bowrider, and I use the tank in the hull. At 4000 - 5000 Rpm's, never hear a sound. I cruise around 4000. When I try to crank it a little, around 5500 Rpm's, the buzzer goes off. Oil is full, water pressure is about 30 psi (the meter is on the 30), and the temp isn't hot. Through reading many posts, I am assuming the engine isn't getting enough gas. Does anyone agree, and if so, how do I fix it?

 

[gvisko1]

CHANGE THE BALL FIRST

 

[RookieHook]

gvisko1 wrote:
CHANGE THE BALL FIRST
Seriously? This would be great if this was the only problem. How does the bulb restrict fuel?

 

[Lattitudechange]

This is your second thread asking about fuel restriction and I haven't seen a reply asking if you have disassembled your screen to clean it.

Check your screen and clean it. If you have a separator check that too. Fuel restriction will set off an alarm on some OB's.

 

[RookieHook]

Lattitudechange wrote:
This is your second thread asking about fuel restriction and I haven't seen a reply asking if you have disassembled your screen to clean it.

Check your screen and clean it. If you have a separator check that too. Fuel restriction will set off an alarm on some OB's.

I believe this is my first post on checking fuel flow. The first was about what buzzer indication I was hearing. From that I believe it is a fuel restriction.

Is the only screen the inline filter right before the engine?

Also, what fuel water separators are best?

 

[MakoMike]

RookieHook wrote:
Is the only screen the inline filter right before the engine?


No there is (or should be) a screen right at the bottom of the pick-up.

 

[unkleJ]

I think there also should be at least one fuel filter or screen on the engine block itself. if you don't have any kind of manual for your engine, check here (www.crowleymarine.com/parts.cfm), look up your engine and check out the exploded view diagrams of your engine's fuel system, carbs, and engine block, and you should be able to see if there are any more filters or screens of any kind.

but if your only problem is a buzzer going off (in other words, it runs fine), then I kind of doubt its a fuel supply problem. If it was, the engine wouldn't run right, it'd bog, hesitate, something like that.

What made you think it was fuel supply related? IMO, a buzzer would more likely be related to engine temp, oil level, or something like that.

 

[RookieHook]

unkleJ wrote:
I think there also should be at least one fuel filter or screen on the engine block itself. if you don't have any kind of manual for your engine, check here (www.crowleymarine.com/parts.cfm), look up your engine and check out the exploded view diagrams of your engine's fuel system, carbs, and engine block, and you should be able to see if there are any more filters or screens of any kind.

but if your only problem is a buzzer going off (in other words, it runs fine), then I kind of doubt its a fuel supply problem. If it was, the engine wouldn't run right, it'd bog, hesitate, something like that.

What made you think it was fuel supply related? IMO, a buzzer would more likely be related to engine temp, oil level, or something like that.

I concluded the buzzer was due to fuel from a different post regarding the buzzer. I haven't kept the throttle up when I buzzer starts to see if it bogs down. I immediately let off, check water pressure, oil, and temp. Thanks for the site, I'll check.

 

[TogTime]

Could be Fuel Restriction

Yes, buzzer could sound off if fuel restriction.

You indicated how could bulb be a simple fix? The bulb has an anti-siphon valve in it. They DO go bad. Everyone here is giving good advice. Here is my 2 cents in this order.

Check the ball to see if it stays hard (No jokes guys! LOL). If it doesnt, change it out. Next, check fuel filter on block. I doubt this is the suspect but check anyway.

Next check your fuel filter/water separator. Is it full of water? Has it been changed this season? If not, I would suggest replacing.

Your buzzer could also be indication that VRO not pumping enough. Do you have your VRO still connected? Is the oil ball primed and stays hard? VRO pumps do go bad too! Could you have the start of a deteriotated fuel or oil line? Check it out.

Also, you indicate that your Ocean Runner is an early model. To be on the safe side, I would pull the air silencer off and crank her up on the muffs. Check each carb and ensure no fuel is spewing out. you may get miniscule misting, but unacceptable for a spew or spray at idle. Start of clogged up high speed jet(s)? Worser yet, a reed could have become loose and now you run the risk of cylinder damage. This is atypical, but definitely e-z to check and worthwhile.

Oh, also make sure that your fuel vent is clear and not clogged up with crap like corrosion.

Post back after you have done this. Suggestion: purchase a manual for your motor. It has a wealth of info. Also, check out www.marineengines.com. You can post your inquiry there too (specific to OMC/Johnson/Evinrude. Many very knowledgeable ppl on that site who KNOW outboards.

One last thing... may top notch mechanics would likely tell you to FIRST check spark and compression to determine you don't have the makings of engine failure. Check to see if you have a strong blue snapping spark on each cylinder that jumps at least 7/16". Check compression too on each cylinder. If your readings deviate more that say 15%, I would consider running OMC Engine Tune thru the schraeder valve to see if you have sticking rings. This decarbs your engine pretty well. If that doesnt help, then you may have the start of cylinder damage resulting in loss of compression. At which point, you are forced to pull the heads for visual inspection.

If I were in your shoes, I would do the fuel/oil stuff first and cross my fingers. Find the root of your problem NOW before a catastrophic engine failure occurs like a blown powerhead!

Best of luck.

TogTime.