editorial
I LOVE this kind of discussion/debate, so sorry if anyone takes offense, none intended.
I LOVE this kind of discussion/debate, so sorry if anyone takes offense, none intended.
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Back to AIR filters.
Yes Jack, they can disintegrate if they get too old and brittle. There have been stories here about the Yanmar eating the foam air filter. I buy a new one, use one year, wash it for the second year, and then replace.
Yes Jack, they can disintegrate if they get too old and brittle. There have been stories here about the Yanmar eating the foam air filter. I buy a new one, use one year, wash it for the second year, and then replace.
On Oil Filters
the follwing is a copy of an older post by Dennis O'Leary "Here is the deal on using non-Yanmar oil filters. Years ago Yanmar had a problem with the oil pressure sending unit. It was placed ahead of the oil filter and would gunk up and give false low pressure warnings. To fix this problem Yanmar Engineers moved the filter ahead of the sending unit and hence the sending unit know sees only filtered oil. Problem solved right ?? By doing this they also moved the filter ahead of the oil pressure requlator and hence the filter in now on the high pressure side of the regulator. All oil filters, Fram and Yanmar have pressure relieft valves built in. (Take one apart and you will see a button on the top that you can press to open). This valve is there to provide a flow by in the event the filter is clogged. (ie. You don't change it enough). Fram filters are built for applications in which the filter is on the low pressure side of the oil pressure requlator. (This is the case with most engines, diesle and gasoline). With a Fram filter on a Yanmar engine the pressure valve will stay open and you will have, in effect, no oil filter. You will not see any effect from this, looks like it fits, dosn't leak, etc. but no filtering is taking place. Yanmar filters are designed with a higher pressure releif valve. Extra costs sucks but I'll take filtered oil over non at any cost."
the follwing is a copy of an older post by Dennis O'Leary "Here is the deal on using non-Yanmar oil filters. Years ago Yanmar had a problem with the oil pressure sending unit. It was placed ahead of the oil filter and would gunk up and give false low pressure warnings. To fix this problem Yanmar Engineers moved the filter ahead of the sending unit and hence the sending unit know sees only filtered oil. Problem solved right ?? By doing this they also moved the filter ahead of the oil pressure requlator and hence the filter in now on the high pressure side of the regulator. All oil filters, Fram and Yanmar have pressure relieft valves built in. (Take one apart and you will see a button on the top that you can press to open). This valve is there to provide a flow by in the event the filter is clogged. (ie. You don't change it enough). Fram filters are built for applications in which the filter is on the low pressure side of the oil pressure requlator. (This is the case with most engines, diesle and gasoline). With a Fram filter on a Yanmar engine the pressure valve will stay open and you will have, in effect, no oil filter. You will not see any effect from this, looks like it fits, dosn't leak, etc. but no filtering is taking place. Yanmar filters are designed with a higher pressure releif valve. Extra costs sucks but I'll take filtered oil over non at any cost."
The old Fram addage pertains...
...to the Yanmar filter, now. When using a Yanmar filter..."You can pay me now...or you can pay me later". For an extra 4 bucks, I'll take the Yanmar filter and not worry that it's properly working for me. I even keep a couple of spares on board.
...to the Yanmar filter, now. When using a Yanmar filter..."You can pay me now...or you can pay me later". For an extra 4 bucks, I'll take the Yanmar filter and not worry that it's properly working for me. I even keep a couple of spares on board.
That's interesting...
George, thanks. Wow. But, I didn't think there was a pressure regulator per se. I thought most engines just ran unregulated, with a high-pressure relief to protect the seals, and a pressure relief inside the filter in case it clogged. I know my pressure varies with engine speed, which means its not regulated. Does a Yanmar regulate to a particular pressure? I just re-read your post, and it doesn't really make sense to me. Could it be Yanmar FUD on non-OEM filters? jv
George, thanks. Wow. But, I didn't think there was a pressure regulator per se. I thought most engines just ran unregulated, with a high-pressure relief to protect the seals, and a pressure relief inside the filter in case it clogged. I know my pressure varies with engine speed, which means its not regulated. Does a Yanmar regulate to a particular pressure? I just re-read your post, and it doesn't really make sense to me. Could it be Yanmar FUD on non-OEM filters? jv
price
by the way, none of these things is prohibitvely expensive. Yanmar filters are actually quite reasonable for OEM - like 7 or 8 bucks. Universal are $12 plus, it seems.
by the way, none of these things is prohibitvely expensive. Yanmar filters are actually quite reasonable for OEM - like 7 or 8 bucks. Universal are $12 plus, it seems.
air filter, oil filter, fuel filter,
they all use paper for filtering. And my question is, is there any one really knows how many companies making those paper? Brand name on the pakage means nothing if they use same paper(and there are more OEM companies making metal or plastic cans for all the brand names you knew). Anyway I am no brand name believer. sorry if this offensed anyone.
they all use paper for filtering. And my question is, is there any one really knows how many companies making those paper? Brand name on the pakage means nothing if they use same paper(and there are more OEM companies making metal or plastic cans for all the brand names you knew). Anyway I am no brand name believer. sorry if this offensed anyone.
read the study
John, A link to an amateur study was provided ina previous post - its interesting: http://www.frankhunt.com/FRANK/corvette/articles/oilfilterstudy/oilfilterstudy.html It doesn't go as far as we are interested here, in that it doesn't identify the manufacturer adn model of the OEM marine filters; but you'll learn a lot about how theses are made, and how they can vary in (apparent) quality. What I think is interesting is, in the case of marinized engines, what are the filter recommendations of the original engine manufacturer? For example, what filter does Kubota recommend, and what do they say about after market filters?
John, A link to an amateur study was provided ina previous post - its interesting: http://www.frankhunt.com/FRANK/corvette/articles/oilfilterstudy/oilfilterstudy.html It doesn't go as far as we are interested here, in that it doesn't identify the manufacturer adn model of the OEM marine filters; but you'll learn a lot about how theses are made, and how they can vary in (apparent) quality. What I think is interesting is, in the case of marinized engines, what are the filter recommendations of the original engine manufacturer? For example, what filter does Kubota recommend, and what do they say about after market filters?
Kubota filter for M25
Example: the Universal M25 is a Kubota D850. The Kubota OEM filter is part number 70000-15241. The price varies wildly, but the apparent lowest, or "best" price one can find on the web is $4.65. This is almost 1/3 the price of the Universal "OEM" filter. Specs from Kubota: M20 x 1.5 thread 3" O.D. x 3 1/8" HT 8 to 11 pis pressure relief anti-drain valve 27 micron http://www.tractorsmart.com/PartsBooksKubota/KubotaPriceList.asp http://www.carverequipment.com/parts.htm
Example: the Universal M25 is a Kubota D850. The Kubota OEM filter is part number 70000-15241. The price varies wildly, but the apparent lowest, or "best" price one can find on the web is $4.65. This is almost 1/3 the price of the Universal "OEM" filter. Specs from Kubota: M20 x 1.5 thread 3" O.D. x 3 1/8" HT 8 to 11 pis pressure relief anti-drain valve 27 micron http://www.tractorsmart.com/PartsBooksKubota/KubotaPriceList.asp http://www.carverequipment.com/parts.htm
Not true
I came across one that was so clogged up that it would not go over 1200-1500 rpm. Owner had a high output alternator on it that would slip the belts creating belt dust that clogged it up. New filter and it ran fime. Owner thought the same thing and that the engine was just getting tired. 15 years on the original. I'm talking about an air filter here. Fram is an allied signal company that makes aircraft filters btw.
I came across one that was so clogged up that it would not go over 1200-1500 rpm. Owner had a high output alternator on it that would slip the belts creating belt dust that clogged it up. New filter and it ran fime. Owner thought the same thing and that the engine was just getting tired. 15 years on the original. I'm talking about an air filter here. Fram is an allied signal company that makes aircraft filters btw.
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