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Old 22 December 2003, 13:37   #1
Country: UK - England
Town: south shields
Boat name: jessiesue
Make: avon searider
Length: 4m
Engine: 40hp mariner pull start l/s
Join Date: Nov 2003
Posts: 38
Outboard Motor Gearbox Oil

HI guys me again, have just succesfully carried out a winter service to my 40hp mariner, and found when changing my gear box oil that it came out really black and had a distinct burnt smell, it wasn't abrown colour,whitch could be explained by water contamination, but jet black. Is this just because it might be so old and has'nt been changed for awhile or what.

any advice greatly recieved

seaskimmer is offline   Reply With Quote
Old 22 December 2003, 13:56   #2
Country: UK - England
Town: Herne Bay
Boat name: Rotary Rescue
Make: Pacific 22
Length: 6m +
Engine: Mermaid 160
MMSI: 235021725
Join Date: Nov 2003
Posts: 328
Nothing to lose any sleep over, more likely to have been in there a while and may not have been right oil, mind you gear lube does stink abit anyway

Paul F is offline   Reply With Quote
Old 22 December 2003, 14:21   #3
Country: UK - England
Town: Midlands
Make: Nautique
Length: 6m +
Engine: PCM 5.7l
Join Date: Oct 2003
Posts: 1,082
You'd expect it to be more of a white colour if there was water in it. I agree with paul, dont worry about it.
simmons0 is offline   Reply With Quote
Old 22 December 2003, 15:07   #4
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,850
It's been overheated. The blackness is carbon. Nothng you can do about it now. If you feel it's better out than in, you could flush it through. After which, just fill it with new oil and change it regularly from now on. Keep an eye out for more play in the shaft than normal and, also, any undue noise. It'll likely be ok.
jwalker is offline   Reply With Quote

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