Oil leak from filter hoses

boater2065

boater2065

Active Member
Jul 30, 2018
222
Everett, WA
Boat Info
Searay
Engines
merc
Hi all, I've been noticing the bilge in my boat getting thicker and thicker with oil lately. Figuring I had a leak, so I checked my oil level and it was indeed low. I looked around and found the hoses that connect to the oil filter have oil at the transition from pipe to hose. I cleaned all that up really well then fired up the engine and watched that spot. As the engine warmed up, oil began to seep out from that spot I had just cleaned. Id like to be able to fix things like this on my own, but I'm a total noob and need some help. Can anyone provide me some assistance on what could be happening here, what I may need to fix it, etc? I uploaded photos to show the bilge and also the hose where it is leaking. My engine is a Merc 5.7 in a 2002 260DA. Thank you all in advance.

Jeff
 

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It's probably the lines to the remote oil filter(s). The crimps go on them and they all leak eventually. I had to have them done on both my last boats.
 
If you have easy access to the actual filter location on the block you can save some money and eliminate the remote filter set up. There is an adapter that mounts to the filter location on the block with a hex bolt that can be easily removed and a regular oil filter is then installed.
 
Thank you all for that info. Where do you all typically buy your merc cruiser parts from? There must be a well known website out there for engine parts?
 
I research my part number on the BAM site or similar, then go to Ebay for the best OEM price.
 
@scoflaw Thanks, i am on that site now. Only issue now is i don't know which exact engine i have....that site has about twelve 5.7 liter merc cruisers, and not sure how to tell what i have (noob).

@Wanderer 290 Thanks for that link. Unfortunately i'm not seeing much for the merc cruiser 5.7. I'll keep looking around for it though
 
You have an engine number don't you ? All that small block stuff will be the same, if the picture looks correct.
 
@scoflaw I will have to take a closer look to find the exact model of my boat. Appreciate it, hopefully this will solve my problem with the leaking oil.
 
Forget the model, you need your engine serial # for all future parts purchases. Mercruiserparts.com is another good site.
 
Little Ducky said:
You could always remove the line and then take it to a hydraulic place or a good autoparts store (some larger NAPA stores) and have them make you one.
Click to expand...
Nope. It's all stainless steel. The hose guys will back down when they see that. Just replace them. Scoff is right.
 
Hello all. Update on this...i have found the two hoses i need and am ready to get this project done. I will be going down to the boat this weekend to replace the lines. Question for anyone who has don this before, do i need to use any thread sealant when threading the new hoses into either the block or filter?
 
Jeff Fabiani said:
Hi all, I've been noticing the bilge in my boat getting thicker and thicker with oil lately. Figuring I had a leak, so I checked my oil level and it was indeed low. I looked around and found the hoses that connect to the oil filter have oil at the transition from pipe to hose. I cleaned all that up really well then fired up the engine and watched that spot. As the engine warmed up, oil began to seep out from that spot I had just cleaned. Id like to be able to fix things like this on my own, but I'm a total noob and need some help. Can anyone provide me some assistance on what could be happening here, what I may need to fix it, etc? I uploaded photos to show the bilge and also the hose where it is leaking. My engine is a Merc 5.7 in a 2002 260DA. Thank you all in advance.

Jeff
Click to expand...
I had to replace mine on twin 5.7s, not a fun job with limited access. Should be straight forward with one engine. I kind of wished they just put the filter on the block sometimes.
 
Jeff Fabiani said:
Hello all. Update on this...i have found the two hoses i need and am ready to get this project done. I will be going down to the boat this weekend to replace the lines. Question for anyone who has don this before, do i need to use any thread sealant when threading the new hoses into either the block or filter?
Click to expand...
I did not. Grease Lighting is your friend for cleaning up the bilge. Use an aluminum pie tin to catch oil as you remove and/or oil pads.
 
I ended up needing a bunch of crows feet wrenches and angle attachments but the filter housing on the block on our port engine basically touches the stringer. As mentioned, a single should be much easier.

no special sealant and from memory the torque specs were pretty modest. Tighten snug and make sure the mating surfaces are clean and you should be good
 
Jeff Fabiani said:
Hello all. Update on this...i have found the two hoses i need and am ready to get this project done. I will be going down to the boat this weekend to replace the lines. Question for anyone who has don this before, do i need to use any thread sealant when threading the new hoses into either the block or filter?
Click to expand...

If the pipes are flared on the ends, then the threads don’t actually seal anything. They just push the flared pipe in and hold it tight.

The flared ends are what actually create the seal.
 
I had the same leak on my 454s. the port engine went first 2 years ago and I ordered a set of two hoses since both the hoses from the cooler to the filter and the one from the filter down to the block where I think a non-remote filter would have attached. Both mine were leaking slightly. But i also bought a second set of hoses for the starboard engine, figuring it would eventually leak too. it did. I did that one this fall before layup for winter.

Easy job except for the hose attachment down low. THe place it fits in is vertical (hose comes up from the bottom0 and what ever it threads into flexes and moves a bit. So with an oily fitting it is hard to get the threads started, working blind in a hot cramped bilge. The other 3 connections were dead simple. Still, it is a pretty simple DIY. I cut the bottom of a plastic jug to catch the oil that will spill from hoses as you replace them, and then wiped up what spilled with simple green degreaser. kind of messy job.
 
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