The usual reason is that a friend, of a cousin from a previous marriage, once had a piston go bad, and his mechanic told him to. The reason being, they were trouble from day 1, and they still are.
The oil is mixed in the OMS then sent to the carburetors. A failure would result in multiple, simultaneous cylinder failures. The failure of a single cylinder was most likely a problem with a carburetor.
FWIW: I have the same motor. Over 2000 hours on it now. A couple of electrical problems in it's lifetime but nothing involving the oiling system.
Replaced the OMS as a prevent measure @ 1000 hours.
In keeping with the oil to fuel question, I have a 1988 6 HP jphnson that calls for 100 - 1 (written on the engine itself) while my brothers 6 HP evinrude (1994 I think) calls for 50 - 1
100 - 1 scares me. any downside in running 50 - 1 in the johnson?
In keeping with the oil to fuel question, I have a 1988 6 HP jphnson that calls for 100 - 1 (written on the engine itself) while my brothers 6 HP evinrude (1994 I think) calls for 50 - 1
100 - 1 scares me. any downside in running 50 - 1 in the johnson?
You should be running it on 50:1. See the link I posted earlier.
OMC flirted with 100:1 mixtures around 1985 and for a few years after but later advised that they should in fact all be run on 50:1. The decals referring to 100:1 should have been removed and the owners manual amended too.
Dueto failure, Last 2 times oilt to fuel ratio is about 10:1. Oil side leaks bad and I believe it is original. I whish oil side could be rebuilt. It is a good system but when it fails it causes excessive oil use. I will just mix in tank for now and look to buy a new one at some point in time. I am new to boating.
