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TOPIC: Bayliner 3870 Air Sep type

Bayliner 3870 Air Sep type 20 Jan 2016 22:13 #1

  • brokership1
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Just purchased 38 with 175 Hinos. The air filters look like the picture. Is there material to wrap around this filter or do I replace the whole thing. If so what filter should I substitute.

Thanks in advance for your input.

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Bayliner 3870 Air Sep type 20 Jan 2016 22:36 #2

  • NeilW
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K&N makes a filter wrap for this, you might check online to see which model fits. I use them on my Hino 250's

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Bayliner 3870 Air Sep type 20 Jan 2016 22:45 #3

  • canoel
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K&N also make full replacements as well. Some heavy truck shops also carry the foam wrap as well.
There is also a shop vac filter that fits nicely. I keep a couple in my tool kit as spares. I have heard of some people that will run the shop vac foam all the time, with it seems, no ill effects.

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Joel
1987 3818 Hino 175
"Knotty Girl"
Prince Rupert B.C.

Bayliner 3870 Air Sep type 20 Jan 2016 23:06 #4

  • smitty477
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Hello Brokership1,

The thoughts about using the replacement K & N filter in its entirety or just the K & N wrap are both very good options either of which work real well as I have done both on one boat (Hino/Bayliner) or another.
I do not have the K & N numbers handy right now so if someone does not post back in a day or so I will look them up for you.

But ...if you do go the route of re-using the housings and adding a wrap please note that the heavy rust will be inside the cleaner element and will come loos eventually finding its way to the valves and pistons. Before re-using the housings with their rusty frame and mesh I would seriously clean them by beading or similar means and coat them so they cannot introduce this problem to the Hino's.
That looks to be a 'rattle can tune-up' there so I would guess you have a number of other items that need checking along the way.

Hope this helps
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Northport NY

Bayliner 3870 Air Sep type 20 Jan 2016 23:16 #5

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" I have heard of some people that will run the shop vac foam all the time, with it seems, no ill effects."

Hello Canoel,

I used the vacuum wraps about 20 years ago on my first Hino Bayliner for about a year before someone clued me in on their makeup.
Long story short they do not pick up most of the hard particles which could damage the engines so I switched to the K & N's.

FWIW - similar to most all things that I post about I initially did not believe the vac wraps could be that bad so I did a test as challenged by my air filter mentor at that time (20+ years back).
I used a good tight bag vacuum to pick up as much 'stuff' as I could on my 38 Bayliner carpets as I could. Also vacuumed a couple of other friends boats slipped next to us at the same time to get a decent pile. All kinds of stuff in there but plenty of sand like particles and hard light 'dust; stuff the kind fine sandpaper is made of.
Took that 'pile' and broke it into two similar piles of equal height and ran it through the shop vac twice - once with the typical shop v wrap and another time with the K & N filter in place of the shop vac wrap.
Trail one with the K & N filter on the dock yielded almost no noticeable results as we picked up the pile of 'dirt.
Trail two with the shop vac wrap had us all headed for the hills as the smoky, cloudy, pile of stuff came back out the vacuum exhaust.

Since that point I no longer use shop vac wraps intended for wet pickups for the Hino air cleaners nor do I recommend it for others.

Hope this helps

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Northport NY

Bayliner 3870 Air Sep type 20 Jan 2016 23:55 #6

  • diveguy
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Great comparison Smitty. I have the shop vac filters the PO put on and will be changing them for sure. I think the K&N part numbers are posted in the hino database under the MY forum.
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Bayliner 3870 Air Sep type 21 Jan 2016 01:03 #7

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"Great comparison Smitty. I have the shop vac filters the PO put on and will be changing them for sure"

I did find out that some of the typical upright vacuums like the Bissell's have foam filters with much finer cells that pick up dust pretty well but since they are much smaller in size they need to be stitched together to fit and will still often melt under engine room conditions.
After learning about more about vacuum filters than anyone should have to know it became apparent that engine filters were preferred.

"I think the K&N part numbers are posted in the hino database under the MY forum."
Exactly - great catch.
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Northport NY
Last Edit: by smitty477. Reason: Diveguys K & N note

Bayliner 3870 Air Sep type 21 Jan 2016 03:24 #8

  • Norton Rider
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I highly recommend K&N filters. I started using them on dirt bikes in the 70s and never had any issues with them.

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1999 3788, Cummins 270 "Freedom"
2013 Boston Whaler 130 SS
Anacortes, WA

Bayliner 3870 Air Sep type 21 Jan 2016 03:34 #9

  • Masterman
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Hi Curt from your neighbor,
R

emove and replace with k&n ,to rusty to save ....k&N part#ru-0960

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{Living our Dream}
John & Nancy
1988 Bayliner 38
175 Hinos 8.5 kw Westerbeke
Sandy Point Ferndale Washington
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Bayliner 3870 Air Sep type 26 Jan 2016 23:48 #10

  • brokership1
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Thank you all for the excellent suggestions. and a special thanks to John for the great pic.
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Bayliner 3870 Air Sep type 27 Jan 2016 00:50 #11

  • louis kimpton
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On mine i install some K-N filter

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