Sure it's 1988 and 100hp? I thought they had a 90 and a 115 ??

Try this........ use the boat on Vacation - THEN - tow it to a mechanic and
have him look at the excessive oil consumption.

Burning too much oil never hurt a 2-stroke in the short run.

-W



"Denis Roy" wrote in message
news:vU%Mc.114793$ek5.44429@pd7tw2no...
I have an 88 100 horse Merc outboard, oil injection. It seems to be
injecting oil at the rate of 1 litre every 1 1/2 hrs of operation.
Manual
says the 4 litres should last 18 hours at WOT. It is not leaking out and
the motor is not emitting any visible smoke. It seems to run normally.
The
motor is a recent purchase and I don't really know if this is a sudden
development or not.

Possibly related: Temp gauge only lifts off of 60F a bit when I boat in
warmer water. Usually it doesn't move at all. This is either a bad temp
sender or bad thermostat which causes motor to never really get warmed up
properly. Would a stuck open thermostat cause excessive oil consumption?
Is
there an adjustment that can be made to the oil injection pump?

Any advice is appreciated. Vacation is coming and I don't want to tow the
boat 100 miles to the mechanic if I can avoid it.

--
Denis Roy
D. Roy Woodcraft
www.ideasinwood.com