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merc 60/40
- Thread starter lemi
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Lil' Blue Rude
Well-known member
I've not heard of much other then the new impellers which are just a cut back 6 7/8". I'm not sure if mercury has any other changes in mind. Been told they pushed pretty hard to get what they have out of them.
I've heard people talk about companies reflashing the ecm on them but I've not talked to anyone that's done it first hand. I figure if there was a gain to be had there everyone would be doing that.
I've heard people talk about companies reflashing the ecm on them but I've not talked to anyone that's done it first hand. I figure if there was a gain to be had there everyone would be doing that.
handyandy
Well-known member
An upgrade? it's called trade it off for a older two stroke.
LarryMc
Well-known member
Specs from the Mercury Four Stroke Jet web page.
https://www.mercurymarine.com/en/us/engines/outboard/jet/fourstroke-jet-outboards-25-80-hp/#specifications
Jet 25: Bore and stroke -2.40 x 2.36" Displacement - 32.1 CI
Jet 40: Bore and stroke - 2.56 x 2.95" Displacement - 60.8 CI
Flashing the 25 Jet is not going to give you a 40 Jet
https://www.mercurymarine.com/en/us/engines/outboard/jet/fourstroke-jet-outboards-25-80-hp/#specifications
Jet 25: Bore and stroke -2.40 x 2.36" Displacement - 32.1 CI
Jet 40: Bore and stroke - 2.56 x 2.95" Displacement - 60.8 CI
Flashing the 25 Jet is not going to give you a 40 Jet
Lil' Blue Rude
Well-known member
GW Luttrell in Bunker, Mo. He has a shop in town and specializes in high performance outboard jets.
handyandy
Well-known member
That is about normal for that setup. You might get a little more with some work polishing up the impeller and pump housing. If it's a 40 jet it's a 60 powerhead 40hp at the pump not much that I know of you can do to actually gain more power out of the powerhead.
LarryMc
Well-known member
lemi said:
Sounds pretty good to me if you are running against current. What do you get running in still, flat water?
My last blazer 18/52 with mercury 60/40 four stroke would hit 33 consistently down stream by myself with fishing gear, full tank of gas. Would hit 30-31 upstream. It was a 2015 boat and motor. Sold that boat and have all 2017 stuff now. Same boat motor setup. Have not had it in the water yet. Will pleased if it will do the same.
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