Cloudinspector Posted March 18, 2013 Report Share Posted March 18, 2013 the oil pressure warning light/buzzer has started to come on at idle. It's ok with some rpm on and when cold but once warm as soon as i put it in idle the warning sounds. Any ideas, sender unit? oil pump? It's a vetus M4.14 Link to comment Share on other sites More sharing options...
Guest Posted March 18, 2013 Report Share Posted March 18, 2013 (edited) the oil pressure warning light/buzzer has started to come on at idle. It's ok with some rpm on and when cold but once warm as soon as i put it in idle the warning sounds. Any ideas, sender unit? oil pump? It's a vetus M4.14 The last person I suggested they might want to add more info. to their initail post called me a troll but I hope you don't feel the need to do the same. When was the last oil change? Do you have an Oil pressure gauge and if so what does it show? How many engine hours? What oil did you use at the last change? Edited March 18, 2013 by The Dog House Link to comment Share on other sites More sharing options...
Titus Posted March 18, 2013 Report Share Posted March 18, 2013 I had this problem on my old boat with a Vetus M3, a new sender unit cured the problem. Dave Link to comment Share on other sites More sharing options...
RobinJ Posted March 18, 2013 Report Share Posted March 18, 2013 the oil pressure warning light/buzzer has started to come on at idle. It's ok with some rpm on and when cold but once warm as soon as i put it in idle the warning sounds. Any ideas, sender unit? oil pump? It's a vetus M4.14 What oil is in it? Does it match with the reccomended? I picked up some CF by mistake and I had the same problem! Link to comment Share on other sites More sharing options...
RLWP Posted March 18, 2013 Report Share Posted March 18, 2013 I had this problem on my old boat with a Vetus M3, a new sender unit cured the problem. Dave "What can't speak, can't lie" Yeah, right. I would try swapping the sender first as well Richard Link to comment Share on other sites More sharing options...
nicknorman Posted March 18, 2013 Report Share Posted March 18, 2013 the oil pressure warning light/buzzer has started to come on at idle. It's ok with some rpm on and when cold but once warm as soon as i put it in idle the warning sounds. Any ideas, sender unit? oil pump? It's a vetus M4.14 Sender unit is easiest to check and most likely culpret. After that, could be wrong oil, pressure relief valve stuck open, worn bearings, overheating, duff oil pump, blocked oilways/filter. But most likely the sender. Link to comment Share on other sites More sharing options...
Cloudinspector Posted March 18, 2013 Author Report Share Posted March 18, 2013 oil was changed last autumn with the recommend spec oil, morris if memory serves me correct and it's been fine all winter running for 30-40 mins everyday for hot water and the odd potter up the cut. I don't have an oil pressure gauge, i guess i should fit one. coolant temp is fine. Link to comment Share on other sites More sharing options...
Paringa Posted March 18, 2013 Report Share Posted March 18, 2013 And it is def filled to the correct level? Link to comment Share on other sites More sharing options...
Cloudinspector Posted March 18, 2013 Author Report Share Posted March 18, 2013 Yep defo filled to correct level. Always check it before starting. Link to comment Share on other sites More sharing options...
Chalky Posted March 18, 2013 Report Share Posted March 18, 2013 Sounds stupid (and I'm not trying to score points) however are you sure the dip stick is clean when you check it? I once came across a vehicle with low oil pressure where the owner swore that the oil was showing ok on the dip stick. The old oil had coated the dip stick with a black glossy varnish that looked like wet oil however the engine was dangerously low to the point that it had run its main bearings. Link to comment Share on other sites More sharing options...
Cloudinspector Posted March 18, 2013 Author Report Share Posted March 18, 2013 Yep 100% sure level is correct. I always wipe the dipstick first and do it twice just to be sure. Link to comment Share on other sites More sharing options...
dmr Posted March 18, 2013 Report Share Posted March 18, 2013 As the light only comes on at tickover its not likely to be low oil level. Actually I have met quite a few people who believe that the oil pressure light measures oil level rather than oil pressure!, though I suppose it does detect low oil level in a bad sort of way. The oil light on my old VW bus used to flash if the level was a bit low and I braked too hard!. But seriously, an oil pressure guage is a very useful thing to have as long as you don't become too obsessed by it....it can be a bit disconcerting to bring a well hot engine down to tickover and see just how low the pressure can go! You can fit one via a T-connector to also retain the oil pressure switch...which should be connected to the alarm buzzer. ..............Dave Link to comment Share on other sites More sharing options...
bottle Posted March 18, 2013 Report Share Posted March 18, 2013 Don't do it fitting a gauge will only make you worry when the pressure is not exactly as it should be. For what it's worth I think it is the sender unit or a pressure relief valve or.... Link to comment Share on other sites More sharing options...
RobinJ Posted March 19, 2013 Report Share Posted March 19, 2013 Actually I have met quite a few people who believe that the oil pressure light measures oil level rather than oil pressure!, though I suppose it does detect low oil level in a bad sort of way. Actually! Its more likely to come on at high revs with low oil, as most of it gets sucked up into the engine that quickly, the pump runs out and the oil light comes on! Link to comment Share on other sites More sharing options...
larkshall Posted March 19, 2013 Report Share Posted March 19, 2013 Don't do it fitting a gauge will only make you worry when the pressure is not exactly as it should be. For what it's worth I think it is the sender unit or a pressure relief valve or.... Ignorance is bliss isn't it Link to comment Share on other sites More sharing options...
nicknorman Posted March 19, 2013 Report Share Posted March 19, 2013 (edited) Actually! Its more likely to come on at high revs with low oil, as most of it gets sucked up into the engine that quickly, the pump runs out and the oil light comes on! Definitely. I had a Yamaha with a sump oil level warning light. Unless the oil was near the full mark, it would come on when the engine was revved, until it got quite hot. The oil was getting rapidly sucked up, but then taking its time to return to the sump due to being thick. The first time it happened I got a scare, but then read the manual and realised it was a level light, not a pressure light. Edited March 19, 2013 by nicknorman Link to comment Share on other sites More sharing options...
Cloudinspector Posted March 19, 2013 Author Report Share Posted March 19, 2013 I've ordered a new sender unit so. I'll fit that and see if it cures the problem Link to comment Share on other sites More sharing options...
Cloudinspector Posted March 19, 2013 Author Report Share Posted March 19, 2013 I've ordered a new sender unit so. I'll fit that and see if it cures the problem Link to comment Share on other sites More sharing options...
bottle Posted March 19, 2013 Report Share Posted March 19, 2013 Is that so you will have a spare. Link to comment Share on other sites More sharing options...
ditchcrawler Posted March 19, 2013 Report Share Posted March 19, 2013 I have a mechanical (is that the right term) gauge that always reads zero, it use to read 15 psi after the engine had stopped. Link to comment Share on other sites More sharing options...
Dalslandia Posted March 20, 2013 Report Share Posted March 20, 2013 I have a mechanical (is that the right term) gauge that always reads zero, it use to read 15 psi after the engine had stopped. The Needel might be free on its shaft? or clogged oil line into, or at the meter. Link to comment Share on other sites More sharing options...
ditchcrawler Posted March 20, 2013 Report Share Posted March 20, 2013 The Needel might be free on its shaft? or clogged oil line into, or at the meter. Its in the gauge its self, don't think its a lose needle and it doesn't leak oil. Maybe I will take it home and clean it out. Link to comment Share on other sites More sharing options...
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