9000 ft altitude jetting

[71cudaman]

i need to know what size high and low speed jets i need for a 1990 60 hp Johnson triple that I will be using at 9000 ft altitude

 

[Scott Danforth]

about 27% smaller than you have at sea level. you also need about 27% less pitch. (you are loosing 3% per 1000 feet of elevation)

 

[greggilo]

Curious where would one find different size jets? I moved to 5600 elevation and did not change jets. Engine probably would run better?

 

[71cudaman]

Jet's are available for my 60 HP Johnson from a dealer for OMC. Or so I have been told

 

[racerone]

Gregger----Do you have a 2 hp or 300 hp.----And is it black / white / or blue ?---Yes a good dealer can help you.----The 24 year old clerk at AMAZON can not !

 

[71cudaman]

Jet's are available for my 60 HP Johnson from a dealer for OMC. Or so I have been told

I have been told that there is an OMC technical bulletin # 2217 that has high altitude jet information. I have a copy for 85 HP to 235 HP. I need the page that shows 60 HP.

 

[racerone]

Well----See your friendly dealer.----Buy a jug of oil.----Then they will help you !!

 

[ct1762@gmail.com]

i'd go down 3 sizes. push the primer in at WOT and if it bogs down right away, good to go.

 

[71cudaman]

Sounds good. Thanks for the information.