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Beta Marine Repower Solutions -> Beta Marine Engines -> Beta 20 - Exhaust Water Lift Muffler Sizing ?
Post Info TOPIC: Beta 20 - Exhaust Water Lift Muffler Sizing ?
genkinyc


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Beta 20 - Exhaust Water Lift Muffler Sizing ?
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Hi.

I have a 1 5/8 output from my Beta 20 - Hi Rise exhaust output that will run to a new water lift muffler. I have approx 10ft run of 1 7/8 exhaust hose running upwards to a high loop and down to the transom exit point.

I found the Centek Vernalift 1.63 X 1.88 Vernalift (Top In) 8 X 8 which will fit the hoses perfectly but it only has a capacity of 0.78 Gallons.

The comparable Vetus NLP040 is only in metric sizing and and does not accommodate a 1 7/8" hose (it has a 45mm or a 51mm) BUT it has a larger capacity of 1.2 Gallons.

I cannot find an adaptor from 1 5/8 to 1 7/8 for the Vetus, wonder if I could make those slightly different metric sizes work with the existing hose and normal clamping or would I be inviting leaks ?

Which Muffler would Beta Marine recommend ?

Thank you



-- Edited by genkinyc on Monday 13th of February 2017 07:51:04 AM



-- Edited by genkinyc on Monday 13th of February 2017 08:03:31 AM

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Stanley


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Beta 20 - Exhaust muffler sizing
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1-7/8" exhaust hose is an odd size and best changed for 2".

The small Centek muffler is too small for your application. Centek will make a custom muffler on request. Obviously this will take some time and will cost a little more but I have found their service excellent in the past.

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genkinyc


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RE: Beta 20 - Exhaust Water Lift Muffler Sizing ?
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Hi Stanley,

Thanks, I have reached out to Centek - not sure what volume muffler would be suitable but I used the following formula to calculate (from the Vetus catalogue)

2 x (Hose Volume) x 0.25

2 = Safety Margin

Hose Volume Calculator here - http://www.handymath.com/cgi-bin/cylinder.cgi?submit=Entry

0.25 = 25% Water in hose

So, with an 11ft run of 1 7/8 hose I get a value of 1.58 Gallons needed volume for the Muffler.

Thanks

Darren

 

 



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Stanley


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Great! Please let us know how everything works out.
Stanley

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