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Navman F41 Problem

Old 03-25-2003, 05:05 PM
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Default Navman F41 Problem

I have a Navman F41 and it worked flawlessly last year. For some reason this year it has stopped working. I disconnected it and blew through it and the turbine spins fine. I have notice what I think appears to be the problem. When I turn the engine on it registers 0.0 only after I prime the bulb does it register anything and then it goes back to zero. Also the bulb will not stay firm. I pumped the bulb a few times to inspect for leaks and I couldn't see anything. I also ran the engine for 5 minutes and no leaks. When I pumped the bulb and listened to the transducer I could hear it sucking air from somewhere? So I disconnected the hoses cut them clean and reattached. Still same problem I could hear air being sucked when I primed the bulb. My question is why no leaks? obviously this must be why it is not working. Has anyone had a transducer go bad on them?
Thanks in advance.
Pete
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Old 03-25-2003, 06:25 PM
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Default Navman F41 Problem

PeteF

I've installed my F41 last August and have had no problems. I had other reasons to call Navman techs and they were very helpfull - suggest you give them a call.

Good luck --

"Snow Goose", John Jensen
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Old 03-25-2003, 07:23 PM
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Default Navman F41 Problem

I ve done some reaserch on these units what does everybody think. I just picked up 5500 chartploter with shoftware chip and duel engine fuel ducer for under a 1000 dollars. Any hands on use info would be appreciated.
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Old 03-25-2003, 08:50 PM
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Default Navman F41 Problem

PeteF, Yea my transducer failed after a few minutes of use on it's first run out. Meter read 0.0 at all RPM. The transducer was installed exactly as recomended by Navman. New transducer was provided under warranty and it has been working fine since.

If air was entering the fuel line it would cause a high or erratic readings not 0.0 so this may not be your problem. Navman says to use the plastic clips they provide with the unit to attach the fuel hoses to prevent distortion of the plastic hose barbs which keeps air from entering the line.

Wish they would have just designed it with metal fuel fittings.

[This message was edited by gb2052 on 03-26-03 at 05:43 AM.]
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Old 03-26-2003, 05:18 AM
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Default Navman F41 Problem

The fuel fittings they provided did not fit my 3/8"s line so I had to use hose clamps. The unit (not transducer seems to pick up the sensor fine because when I blow through it it works and when I prime the bulb it it registers as well. I have noticed a direct correlation between when the bulb isn't firm the unit doesn't operate.I checked the bulb by putting a fuel line splice when I removed the transducer and the bulb stays firm. So it must be the transducer. I'm going to call them today.
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