Trouble starting 4stroke high elevations

A

aeviaanah

Petty Officer 3rd Class
Joined
Oct 4, 2011
Messages
77
Going camping this weekend and I had trouble starting my outboard at this elevation. Motor is 2012 Mercury 15hp 4 stroke. Starts fine at 100ft elevation but takes tons of electric start/pull start to get goin at 5700ft. After I get it goin it seems to run fine. Any suggestions to getting it started easier? Any suggestions would be greatly appreciated.
 
B

belairbrian

Petty Officer 1st Class
Joined
Aug 21, 2009
Messages
360
Re: Trouble starting 4stroke high elevations

The carb is jetted for sea level so 100ft MSl is not an issue. But at 5700 ft MSL the thinner air is essentially causing a flooding situation. Thin air same amount of fuel means rich mixture.

Might try no choke starting or treat like its flooded.
 
A

aeviaanah

Petty Officer 3rd Class
Joined
Oct 4, 2011
Messages
77
Re: Trouble starting 4stroke high elevations

Ok I'll try that but what do you mean treat it like its flooded?
 
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