60 HP 4-stroke. EFI RPM WOT

C

crazylarry

Cadet
Joined
Dec 16, 2004
Messages
10
I have a 2002 60 hp. elpfi 4-stroke Mercury Bigfoot.<br />Boat is a 22' Crest pontoon. <br />Prop is 13" pitch. Dia is 14 I think.. Whatever the Big Foot runs.<br /><br />I am only seeing 2400 rpms at wot. Loaded pretty good. Speed is 15.5 mph on GPS.<br /><br />Is the prop that far off or is something else going on..<br /><br />According to Merc. Website Mxx WOT is 5500-6000
 
R

rabidfish

Senior Chief Petty Officer
Joined
Oct 3, 2000
Messages
788
Re: 60 HP 4-stroke. EFI RPM WOT

adjust your tach... You may still have a little too much prop. With clean pontoons you should see close to 20mph on that boat
 
C

crazylarry

Cadet
Joined
Dec 16, 2004
Messages
10
Re: 60 HP 4-stroke. EFI RPM WOT

The back of the tach has a dial with several numbers. How do I know which one to use?
 
C

crazylarry

Cadet
Joined
Dec 16, 2004
Messages
10
Re: 60 HP 4-stroke. EFI RPM WOT

Also, the bottom is clean..Is it possible to see higher speeds, with less pitch. More rpms..<br /><br />The tach was not working when I bought the boat. I looked at it, but did not have a wireing diagram... Took it to a shop, they said it was wired wrong.. Shows about 1000 rpm at idle.
 
Dunaruna

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: 60 HP 4-stroke. EFI RPM WOT

When the motor is off does the tach needle sit on zero?<br /><br />I have the manual for the mercury tach (60hp 4 stroke efi) at work, if you like, I will post the switch positions tommorrow.<br /><br />Aldo
 
C

crazylarry

Cadet
Joined
Dec 16, 2004
Messages
10
Re: 60 HP 4-stroke. EFI RPM WOT

Tes I believe the tach goes to -0- when the switch is off.<br /><br />Would a Clymers manual have this kind of information, or would I need a merc man ??<br /><br />If you could post the setting, I would appreciate it very much..
 
Dunaruna

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: 60 HP 4-stroke. EFI RPM WOT

That's a great link Larry. Looks like your good to go :) <br /><br />Aldo
 
C

crazylarry

Cadet
Joined
Dec 16, 2004
Messages
10
Re: 60 HP 4-stroke. EFI RPM WOT

I got the tach working.<br />Turning 4100 rpm 3 people light load. 16mph(gps) at best.<br />Loaded down 7 people, coolers etc. 4K rpm 14 mph..<br /><br />Ordered a 10 pitch prop. Waiting to see what it does.<br /><br />Thanks again folks.
 
You must log in or register to reply here.
Top