twin 500efi can only get 67mph
#1
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From: Lake St Clair, Mi
i got twin 500efi with a 4blade 27p props, in 38zx full of fuel or almost empty can only get 67mph on gps at 4600-4800rpm. if i trim it out a little more i can get 5000rpm but it also drops a mph off. i know the boat is big and heavy but i thought it should run 75
#2
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From: Sudbury Ontario
Going from memory I think the 500 efi's should be spinning 5000-5200.
Dropping mph while trimming to gain rpm tells me you are over trimming.
#3
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From: Lake St Clair, Mi




