murky oil in 2000 DF70 Suzuki

manitoba1

Petty Officer 2nd Class
Joined
Jan 8, 2002
Messages
121
I used my boat on a fishing trip for the first time about a week ago since changing the oil and winterizing last fall. We fished in Northern Manitoba on a lake that was still with some ice out in the middle. We fished for 4 days with extensive period of trolling (up to 7 hours each day) and didn't open up the boat for any period of time. After a long trip on some extreemly dusty roads I cleaned up the boat and checked the oil level. To my surprise the oil was murky which made me feel a bit uneasy. The boat ran perfect on the trip but I warmed up the engine in the yard with the muffs on and then drained the oil. Definately contamination as the oil smells of gas but the cloudyness tends for me to think of water. Last bit to drain from the engine definately was more whitish and cloudy than the rest. <br /><br />Can running for extended periods in ice cold water at idle speeds allow fuel to enter the oil and/or cause condensation? Might I be looking at a head gasket failure?<br /><br />My plan is first to replace the oil and filter after allowing the oil to drain all night indoors. I thought to replace the oil tomorrow and run it with the muffs and check the oil after. It might be worth a good run out on a local waterway. Any thoughts, comments insights, or suggestions would be appreciated. I'm using 10w40 oil as per the manufacturer and have had no problem with the oil in past years of use.<br /><br />Manitoba1
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: murky oil in 2000 DF70 Suzuki

My guess is that the engine didn't get up to operating temp idling (trolling) in the icy water, Manitoba, and ran rich (in warm-up mode) the whole time. Some condensation might have occurred, too.<br /><br />That would explain gas in the oil, but not water. I would not expect gas to make the oil milky. Was the oil level increased?<br /><br />A compression test should reveal head gasket condition.<br /><br />Good luck. :)
 

manitoba1

Petty Officer 2nd Class
Joined
Jan 8, 2002
Messages
121
Re: murky oil in 2000 DF70 Suzuki

JB:<br />I think that the oil was up a bit but the condition of the oil really threw me off and I forgot to tilt the engine back down before checking it again. The compression check is a great idea. I try that one and hope for the best.<br />I'm putting in the fresh oil tonight when I get home and I have a chance before my kids soccer game I'll try the rest of the checks.<br /><br />Thanks,<br />Manitoba1
 

manitoba1

Petty Officer 2nd Class
Joined
Jan 8, 2002
Messages
121
Re: murky oil in 2000 DF70 Suzuki

Update of the murky oil thing was that it was run a long time in cold water at idle without really working the engine after sitting all winter. Allowed some fuel to get in to the oil and the cold water may have caused a bit of condensation. Engine probably ran it warm up mode due to the extensive trolling without taking it for a good warmup run. Dealer asked me to change the oil and give it a good run. Checked the oil and it was nice and clear. Changed the oil and filter again just to be safe. Engine ran great when I had it out so I guess I'm good to go for the summer. The mechanic said if there was any problem with the head gasket the engine would run like crap which was not the case.<br /><br />Manitoba1
 
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