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Auto part or marine filter-Please Help

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freddiedad

Contributing Member
I am in the middle of replacing my oil and the oil filter I have on there now is a marine sierra 18-7879 Do I need to replace this with a marine filter or can I go to a auto part store and buy a filter? It is a G.M, v6. 1985 searay omc


Yhank you
 
4.3 l cross reference oil filter numbers

if your oil filter is quicksilver #41815 or 35-802884Q
which on the late model GM 4.3L is 18mm x 1.5 thread, 2.625" o-ring diameter then these should fit:

short length 4.25" filter (oem):
Sierra 18-7879
Aquapower 6004
K&N HP2001
AMSOil SDF23
ACdelco PF51, 52
Napa 1036, 1040, 1190, 1340, 1387
wix 51036, 51040, 51190, 51340, 51387
Motorcraft FL-402
Purolator PER111, 112, 173, 307, 1091, 4011; L24011
FRAM PH3980


long length 6.25" filter:
napa 1286
wix 51286
ACdelco PF1406
 
Install a Sierra filter. Do not use an automotive filter. The automotive filters case is a lot thinner than the sierra filters case hence it can rust through. You can dent an Automotive filter with your fingers, at least I can. You will have a difficult time denting a Sierra filter with a pair of channel locks.
 
I have kept my boat in salt water for over 10 years and never experienced a problem with regular Fram or Purelator oil filters.
 
HarMat said:
I have kept my boat in salt water for over 10 years and never experienced a problem with regular Fram or Purolator oil filters.
Click to expand...

You got lucky or you are on a Fresh water lake. Scratch the paint on an Auto filter and watch it rust through (from the outside in) in the middle of your salt water boat season.
 
In the last few years I have removed Purolator oil filters that were so thin from rust that they split when I put the filter wrench on them. For the cost of a Marine filter it's not worth the chance.

BTW the engine in your car as well as mine, is not inside a bath tub full of moisture like a boat engine is. And I also drive in NJ.
 
My boat has been slipped in salt water for 20+ years. The oil and filter is changed every 60-75 hours. I perform all maintenance myself. I have never seen rust on the oil filter. This includes a filter that has been on the boat over the winter.
 
HarMat said:
My boat has been slipped in salt water for 20+ years. The oil and filter is changed every 60-75 hours. I perform all maintenance myself. I have never seen rust on the oil filter. This includes a filter that has been on the boat over the winter.
Click to expand...

You are working on one boat, I work on many. If I see just one filter rusted to the point of failure itis too much. Purolator will not warranty there filter and the damage it will cause if it fails on a marine engine. Sierra will!
 
Docksidemarineservices said:
You are working on one boat, I work on many. If I see just one filter rusted to the point of failure itis too much. Purolator will not warranty there filter and the damage it will cause if it fails on a marine engine. Sierra will!
Click to expand...

It sounds like you have encountered those boaters that do not properly maintain their investment. No manufacturer will honor their product if you do not follow their guidelines.

Based on your comments I would bet the rusty oil filter is from excess water in the bilge as oppose to the normal rusting process. I will continue to use automotive filters on my vessel. Just my .02.
 
I"ve used the Sierra filters for years and when I take em off they still look new, after a year, I also use their fuel filters too...they are available and good for the price...
You want to check to make sure, you don't have a leak from an exhaust manifold drain right on the oil filter,that's the kind of thing that can rust one out quickly. I had this on the other side of the engine, a slight drip of salt water that rusted my starter solenoid terminals into one rusted ball. Made it fun to replace the terminals, not! So check those manifold drains...
 
I use an Auto Filter, and no trouble at all,. but then, I do all my own servicing, and install the Filter with my hands, the 3/4 turn after seating, as per the instructions, and this way, there is no chance of scratching the paint.

Plus, I make sure that the Bilge is always dry. Plus, it doesn't stay on long enough to even look like rusting as I change it every time I change the Oil.

Bruce.

PS. Now, must remember to remind myself to change the oil and filter yesterday.
 
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