Wronf Oil Filter?

[jusw]

Treble C is back in the water, but I have an annoying problem -

Engine (Yanmar 1GM10) strats fine as always, plenty of water coming out of the exhaust and runs well. After a run (not sure how long it requires), when I slow the revs down to pick up my mooring, the alarm sounds. I don't need to lower the revs very much for this to happen.

I never had a problem last season, so I'm wondering what has changed.

Really only two things - I've tightened up the alternator belt (is now the correct tension) and changed the oil and filters.

I used an oil filter "I had in stock" which fits fine - quite a small cannister, but I'm not sure is a direct equivalent to the original equipment.

Could this be my problem? Could the filter cause a reduction in oil pressure when the oil is hot enough to set off the alarm?

I intend swapping the filter for a correct one before using again - but I'd be glad of any opinions.

JuSw

 

[smeaks]

Take away the doubt and fit the right one... If the problem is solved sleep smugly! If it still squeaks check the grade of oil you used.

 

[agurney]

Is it a temperature or oil warning? I'd suspect temperature and a dodgy impeller that isn't pushing enough water at low revs.

Damaged vanes or a slipping bush in the impeller are likely culprits.

 

[smeaks]

Is it a temperature or oil warning? I'd suspect temperature and a dodgy impeller that isn't pushing enough water at low revs.

Damaged vanes or a slipping bush in the impeller are likely culprits.

I think th op is referring to the oil pressure alarm, if it is water then the impeller is first hit!

 

[jusw]

I'm assuming its oil pressure because as soon as you increase revs, the alarm stops - If it were overheating, it would take a short while for the increased flow to cool the engine again??

JuSw

 

[Lakesailor]

I'd change the filter for the correct one.
Some cars used to have high capacity oil filters as standard. If you fitted a smaller one you could suffer a bearing melt down.
Rover V8s, come to mind.
After that pressure relief valve stuck partly open?
Pressure sender switch faulty?

 

[Appledore]

Assuming you have the Type 'A' panel, with three lights, the oil pressure one is the centre one, and should come on whenever you turn the starter key, and again when you stop the engine. It should go off when the engine is running. The left-hand light is the water temperature light, and will (should) only illuminate when the engine is overheating.

As others have said, for the sake of about £8 best to change the oil filter to the recommended type.

Geoff.

 

[jusw]

I'll definitely change the filter - Unfortunately I only have a single light on the panel so it doubles up as alternator, temperature and oil pressure (I think)

JuSw

 

[pete]

I would first check the oil level and if this is ok crank the engine with the starting handle with the decompressor open and the engine switched on, after a few seconds of rapid cranking the warning alarm should stop. ( My 1GM10 does) It may also be a faulty sender.

pete

 

[thalassa]

I'll definitely change the filter - Unfortunately I only have a single light on the panel so it doubles up as alternator, temperature and oil pressure (I think)

JuSw

Some filters have a small flap valve inside, to prevent backflow of the oil. In non original filters this is often not present.

 

[colhel]

jusw, You don't say in your original post if you changed the impeller or not. it could be the alarm sounds as an already warm engine would heat up a slower flow of water very quickly. Would the alarm would sound if the oil pressure is low? Sure it doesn't on my set up.

 

[sailorman]

Oil Filter
Coopers 2819, Diesel Mazda323 or Crosslands 672


My list of equivalents for the 1gm10 filters is:
Oil Filters
LF3462 Fleetguard
L14459 Purolator
PH9688 Fram
PH6811 Fram
PH 3593A Fram
672 Crosland

Fuel Filters
FF5260 Fleetguard
F55174 Purolator
C7516 Fram

 

[Appledore]

I'm assuming its oil pressure because as soon as you increase revs, the alarm stops - If it were overheating, it would take a short while for the increased flow to cool the engine again??

JuSw

Just a thought here. Have you checked/replaced your engine thermostat lately? It was the last job I had to do on my engine this winter, and when I remove the 'stat is was corroded in the open position! I wonder if yours could be corroded shut, thereby not allowing sufficient water to circulate? You'd still get water discharging, but perhaps on slow revs the water around the head might get too hot? As I said, just a thought.

Geoff

 

[jimi]

Is there any possibly it is to do with the alternator rather than the oil? You have changed the belt tension. THis seems to me to be more likely as a source if it occurs when the revs are decreased.

 

[jusw]

Thanks for all of your suggestions - I'll be back on the boat next weekend armed with a new filter a new oil pressure sender and a new impeller - I'll let you know how I get on.

JuSw

 

[Lakesailor]

When the alarm is sounding, pull the wire off the sender and see if the noise stops.

 

[vyv_cox]

Yanmar have changed the size of the oil filter, from a large diameter to a much smaller one. I queried this when I was first given the small one, but it is correct.

It seems most unlikely that any filter could affect oil pressure in this way, unless it was partially blocked by something, or it was not correct for the engine and the ports did not match. Hopefully a new filter will solve it.

 

[Malish]

What grade of oil did you put in? same as last year? 15W 40 or something thinner?

 

[jusw]

Wrong Oil Filter

Back on the boat today - Geoff, you were right, there are three warning lights - shows how much attention I pay!

The warning that went off after a few minutes warm up was indeed the oil light.

Having given the matter some thought, I changed the sender unit - and hey presto, normal service has been resumed - Now I just have to fix a few other things ......................................

Thanks all

JuSw

 

[Appledore]

Back on the boat today - Geoff, you were right, there are three warning lights - shows how much attention I pay!

The warning that went off after a few minutes warm up was indeed the oil light.

Having given the matter some thought, I changed the sender unit - and hey presto, normal service has been resumed - Now I just have to fix a few other things ......................................

Thanks all

JuSw

Glad you got it sorted. My oil pressure switch is also temperamental! Sometimes the buzzer doesn't sound at all, and I find it's the wire connection that's the problem. Knowing where the problem is is always a great relief. Fixing it is sometimes a different matter.

Geoff