I have a 3GM30F Yanmar. You Yanmar owners will know that the air filters are made of a spongy material that most certainly will deteriorate after awhile. Someone told me recently that I would be better off removing it completely, eliminating the possibility of it falling apart and getting sucked into the engine, since the water is essentially a dirt-free environment. Well, it sounds sorta logical, I guess. But on the other hand, I would think that there's a reason that the Yanmar engineers put it there in the first place. Does anyone have experience, or an opinion on this?
Air Filters on Yanmar
- Thread starter Allen14034
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Yanmar design
Hello Allen, I have a 3GM30F also. However I wouls never try to alter Yanmar designs. If you are affraid the filter will fall apart, which I have not seen happen on my boat for the past 6 years, I would juts change the inexpensive filter cartrige Yanmar PN 128270-12540 for 18$ every year as part of annual maintenance. Also note that the foam is backed by a metalic preforated structure preventing tearouts. Why mess with something that works? That is only my opinion!. Good winds
Hello Allen, I have a 3GM30F also. However I wouls never try to alter Yanmar designs. If you are affraid the filter will fall apart, which I have not seen happen on my boat for the past 6 years, I would juts change the inexpensive filter cartrige Yanmar PN 128270-12540 for 18$ every year as part of annual maintenance. Also note that the foam is backed by a metalic preforated structure preventing tearouts. Why mess with something that works? That is only my opinion!. Good winds
They do fall apart
My 2GM20F has the same filter and the foam does disappear. The first time I checked it after buying the boat, half the foam was gone. Where did it go? I replaced it with a new one, but I've since read that the foam is more for silencing than filtration and that one can remove the foam and leave the metal mesh in place. That's what I plan to do when I see the first signs of the foam disintegrating.
My 2GM20F has the same filter and the foam does disappear. The first time I checked it after buying the boat, half the foam was gone. Where did it go? I replaced it with a new one, but I've since read that the foam is more for silencing than filtration and that one can remove the foam and leave the metal mesh in place. That's what I plan to do when I see the first signs of the foam disintegrating.
Yanmar air filters
The Yanmar filter is more of a silencer than filter. It is backed by a screen that keeps the big stuff out. When there is filter element missing, it's usualy been injested by the engine. I've run many engines with just the screen without incident. The disavantage is an increase in noise from the engine. Pat McCartin Inland marine Diesel Buford, GA imd_ga@hotmail.com
The Yanmar filter is more of a silencer than filter. It is backed by a screen that keeps the big stuff out. When there is filter element missing, it's usualy been injested by the engine. I've run many engines with just the screen without incident. The disavantage is an increase in noise from the engine. Pat McCartin Inland marine Diesel Buford, GA imd_ga@hotmail.com
You're right its just a silencer, not a filter.
Atmospheric dust / particles are 'immense' in quantity, even far out at sea. If you desire to prevent such (a very good idea) then go to an automove aftermarket source and select a DRY resinated paper filter and housing assembly .... there will usually be 'sizing' calculations so you can arrive at the correct flow rate and minimial pressure drop across the filter - on these websites. As a 'filter' such open cell foams are entirely worthless vs. protection of engine internals.
Atmospheric dust / particles are 'immense' in quantity, even far out at sea. If you desire to prevent such (a very good idea) then go to an automove aftermarket source and select a DRY resinated paper filter and housing assembly .... there will usually be 'sizing' calculations so you can arrive at the correct flow rate and minimial pressure drop across the filter - on these websites. As a 'filter' such open cell foams are entirely worthless vs. protection of engine internals.
Made filter
Just a comment. I too removed the dirty foam. Replaced it with a house vent filter. A long rectangular filter the width of the original filter cage and cut to length, wired in place. It keeps the intake clean, but does nothing to reduce the noise
This is an easy fix to a small problem.
Just a comment. I too removed the dirty foam. Replaced it with a house vent filter. A long rectangular filter the width of the original filter cage and cut to length, wired in place. It keeps the intake clean, but does nothing to reduce the noise
This is an easy fix to a small problem.
More Than a Noise Supressor
The cone is more than just a noise supressor. The foam may catch the belt dust that is so common in the Yanmar. A few dollars every year or two is well worth the cost to keep the engine happy. Just keep a spare or wash it a couple of times a year in mild detergent. Then make sure it's dry when you re-install it.
The cone is more than just a noise supressor. The foam may catch the belt dust that is so common in the Yanmar. A few dollars every year or two is well worth the cost to keep the engine happy. Just keep a spare or wash it a couple of times a year in mild detergent. Then make sure it's dry when you re-install it.
dump it overboard
I suffered through a one lung yanmar for years. After it stalled for the umpteenth time when the bridge was just opening or when I was making the final approach to my slip, or when all hope af any more wind had died with the last gust, in disgust, I finally agreed to sell the hunter 27 that housed the inglorious engine. Lets see, was it bang bang bang, or thump thump thump, I guess it depended on the rpms.... even after a blessing and reblessing from the mechanics, it wanted, yes wanted to overheat and stall. The air filter was usually considered the culprit when it wasn't the fuel pump. I say again, trow it overboard and get a long shaft outboard.
I suffered through a one lung yanmar for years. After it stalled for the umpteenth time when the bridge was just opening or when I was making the final approach to my slip, or when all hope af any more wind had died with the last gust, in disgust, I finally agreed to sell the hunter 27 that housed the inglorious engine. Lets see, was it bang bang bang, or thump thump thump, I guess it depended on the rpms.... even after a blessing and reblessing from the mechanics, it wanted, yes wanted to overheat and stall. The air filter was usually considered the culprit when it wasn't the fuel pump. I say again, trow it overboard and get a long shaft outboard.
Right
in my humble opinion Fred , Yanmar is right and it is the reason they put the filter on the engine in the first place.
in my humble opinion Fred , Yanmar is right and it is the reason they put the filter on the engine in the first place.
what air filter
ha d 27 hspower yanmar for 5 years(total engine life was 16years) sailed from nj to florida and the bahamas twice--i never knew there was and airfilter in the damn thing!!! i had the engine serviced before the trip down to florida and only serviced the engine once 3 years later. if it aint broke dont fix it!!!!!!
ha d 27 hspower yanmar for 5 years(total engine life was 16years) sailed from nj to florida and the bahamas twice--i never knew there was and airfilter in the damn thing!!! i had the engine serviced before the trip down to florida and only serviced the engine once 3 years later. if it aint broke dont fix it!!!!!!
DO NOT REMOVE IT
That person was stupid! Clean the old one every 1/2 year. Buy a new one every 1 to 2 year! What dope told you to take it out? Someone that wanted to sell you a new engine! It is a filter not just a just a noise supressor!
That person was stupid! Clean the old one every 1/2 year. Buy a new one every 1 to 2 year! What dope told you to take it out? Someone that wanted to sell you a new engine! It is a filter not just a just a noise supressor!
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