Sounds about right, what is your max RPM with a normal load, flat out?
hi all
i have a 1990 Evinrude 115 hp i only get 1 km to the liter is this normal for these old motors
cheers snap
Sounds about right, what is your max RPM with a normal load, flat out?
boat size matters too
i had a 90 same block and got about the same when running around
It's about right according to the old rule of thumb but 4800 RPM at WOT is a little low.
1 US GALLON per 10 HP per HOUR at fast cruise.
4800 is way low, can you borrow another smaller prop to try? Has the motor always been like that? Have you checked motor height? Is the boat or motor new to you?
5000- to 5500 rpm is more real for a Oldtech 115 HP
What could go wrong.......................
I asked on the Bass Boat Central Evinrude forum and the advice is that the operating RPM is 4500 - 5500
Any of those old carby 2 strokes want to be revving up near their max RPM, it will increase motor life, increase performance and better fuel economy, can't see any reason to have it lower in RPM band.
There’s a difference between being propped to reach a wot of 5500 and driving it at 4500 rpm
versus only being able to reach 4500 rpm
If a engine can’t make its peak rpm it’s being laboured through the whole rev range
You didn’t say what boat it’s on is it big enough for the boat to begin with ?
my 90hp 1.7l v4 1998 had a 5500 peak rpm spec
Please yourself, I asked what his max RPM as with a light load, his response was 4500-4800, so we assume that's his max RPM? but, never mind, I'm out.
My 1996 workshop manual, which i believe is the same block, states the 88,90,100,110,115 engines have an operating range of 4500 to 5500rpm. So, while 4800 is within spec, i'd want mine to rev to the mid 5's!
Great motors is all I can add and my two are still going strong with lots of smoke at start up and thats what you want so they will never wear out so the marine tech keeps telling me.
What could go wrong.......................