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Spark arrestor

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penguinantics

New member
Someone please tell me the act

Someone please tell me the actual risk factor of substituting an automobile type spark arrestor for the USCG approved model. I noticed they used them in Volvo autos (paper/metal) up until the conversion to fuel injection around 1970. That design was evidently expected to serve as both a spark arrestor and air filter. They list for about $15 and would be a lot more affordable than the marine approved ones at $150.
 
"Cars don't have spark arr

"Cars don't have spark arrestors, just air filters no matter how simular the look.
Risk: 1) You can get blown up.
2) USCG can cite you if they happen do do
as "safety inspection"
3) If #1 happens, your insurance company won't pay a cent."
 
"Over and above what Robert sa

"Over and above what Robert said: paper/carboard in an air filter can catch fire if the engine backfires, but not a flame/spark arrestor."
 
The local certified Volvo-Pent

The local certified Volvo-Penta/Mercruiser mechanic in my home city told me a K&N air filter(when properly oiled) is an acceptable substitute for a metal flame arrestor and would satisfy the USCG requirement. They're about 50 to 60 bucks give or take. Just need to route crankcase breather hose into bottom of filter pan depending on your model I guess.
 
Will he give you that assuranc

Will he give you that assurance or show you that in writing ? Usually part of USCG approval is it being marked as such or have a part number that is identified as such.
 
"I guess you'll have to as

"I guess you'll have to ask the coast guard if you want to prove you're right...it matters not to me because he did put it in writing. Just trying to help with an experience i happen to have had, not preaching the gospel of what is or isn't."
 
"OK... I did my home work. K&a

"OK... I did my home work. K&N does make a special marine filter that meets USCG requirements and has been tested and certified. This is not the same as, "a K&N air filter (when properly oiled) is an acceptable substitute for a metal flame arrestor and would satisfy USCG....""
 
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