Outboard motor problem
Submitted: Sunday, Sep 16, 2007 at 17:29
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Brian B (Mackay Qld)
Hi all,
This may not be much relevance to a 4WD
forum but some of you may be able to help since alot of you have boats.
I have a 1993 70HP oil injected Yamaha outboard with 512hrs.
On the last two fishing trips, the return jorney home involved the oil sensor light, warning buzzer, and engine speed limiter being activated at start up to return after fishing for a couple hours.
It had plenty of oil both times and luckily we were not far from the ramp for a slow journey back at a max of 2000rpm.
They departing journey did not have any problems and the motor went fine. Clean new fuel was also used.
A routine service was done at 500hrs with no major problems reported by myself before the service or after the service by the reputable marine mechanic.
Before i book it in again and spend a few more hundreds of $$$ getting it sorted out, some of you may have experienced this problem before.
Thanks in advance for and helpful replies.
Reply By: Member - George (WA) - Sunday, Sep 16, 2007 at 18:53
Sunday, Sep 16, 2007 at 18:53
Faulty oil level sensor. Had the same problem with my 70hp merc outboard. Solution/s, disconnect oil sensor and keep an eye on the oil level or replace oil sensor, around $250
Cheers
AnswerID:
262528
Reply By: JustT - Sunday, Sep 16, 2007 at 18:56
Sunday, Sep 16, 2007 at 18:56
Are you sure it was the oil light? had a 88 30hp yammy and it was just had a "Something is broken" alarm -
mine turned out to be a thermostat that didn't open all the way - which resulted in overheating (alarm + flashing light + reduced RPM).
AnswerID:
262530
Reply By: shade10 - Sunday, Sep 16, 2007 at 19:37
Sunday, Sep 16, 2007 at 19:37
Hi Brian, i would check the oil injector, oil filter, oil
tank for blockage and blow it all out with compressed air, except for oil; filter, if cheap replace, which it should be!!!! Check you sensor for faults, ie with multi-meter or grounding sensor!!! Becareful testing and pulling apart anything unsure!!!! Good luck with problem!
AnswerID:
262541
Reply By: MEMBER - Darian (SA) - Sunday, Sep 16, 2007 at 20:21
Sunday, Sep 16, 2007 at 20:21
No - that's ok - a lot of cars talked about here could do better with an outboard motor under the bonnet :-o)
AnswerID:
262547
Reply By: chardthechippy - Sunday, Sep 16, 2007 at 21:08
Sunday, Sep 16, 2007 at 21:08
I have a Yammy oil inj and the same thing happened half way across the gulf, (S.A.) it turned out to be the oil filter. A near brand new motor too. You must have got some bad oil, it doesnt take much crap to clog up a filter.
AnswerID:
262564
Reply By: roblin - Tuesday, Sep 18, 2007 at 20:35
Tuesday, Sep 18, 2007 at 20:35
Brian,
I don't know whether your oil bottle has a sensor in it but, if it is similar to the Mercury style, they use a float with a magnet attached to the bottom of it. As the float/magnet combination falls, it is activates a reed switch in the inner tube thus turning on the alarm. The problem with Mercury items is that the donut magnet detaches from the float and sinks to the bottom of the oil bottle. Result: alarm comes on.
I found out this the hard way as the dealer I bought it from disconnected the alarm and, through low oil and no alarm, motor seized and it cost me over $2K to fix.
Anyway, if your Yamaha's sensor is like the Mercury one, you won't be able to buy a sensor, only a new oil bottle. As they say, necessity is the mother of all invention. I drained the oil bottle, was able to spring the circular spring type retaining clip from the top of the float rod (using a hooked piece of wire), removed the float and magnet, cleaned thoroughly, stuck magnet to the bottom of the float (with super glue of all things!) then reassembled said system. It worked a treat and didn't give further problem. Maybe the Yamaha system isn't like the Mercury one, but it may be worth investigation.
Mine was on a 90Hp oil injected motor.
cheers
Rob
AnswerID:
262913