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Old 26 June 2014, 15:27   #11
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
Oh I get it, thanks al

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Old 26 June 2014, 15:56   #12
Country: UK - England
Town: Sussex
Make: RIBTEC 655
Length: 6m +
Engine: Yam 150
Join Date: Oct 2007
Posts: 1,156
Originally Posted by PeterM View Post
So no prmier bulb in any EFI ?

Ive got two EFI engines both with prmier bulbs .... both running off portable tanks
Not sure it is applies to all EFI's, someone will know, I also had a 2011 60 and that did have one, though it was rigged but numpties.

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Old 26 June 2014, 16:28   #13
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Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,803
The 100hp is the same....
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Old 27 June 2014, 23:57   #14
Country: Denmark
Town: Skanderborg
Boat name: pimp
Make: Ribtec
Length: 6m +
Engine: outboard
Join Date: Aug 2012
Posts: 107
OK, I will try without. Thanks guys
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Old 28 June 2014, 07:50   #15
Country: UK - England
Length: no boat
Join Date: Jun 2014
Posts: 4
All the big 4 cylinder 4 stroke Mercury/Mariners have a fuel supply module. If you use a primer bulb with these engines, then it can cause the fuel system to lock up and become unusable until the pressure has been released.
This applies to the 80 through 150hp naturally aspirated 4 strokes and the Verados. Basically if it tells you and primer bulb isn't needed then leave it out.
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Old 28 June 2014, 15:57   #16
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,335
Yeap No primer bulb on all L4NA Engines, (4 stroke EFI) It has as said, a Fuel supply module (FSM) which will draw the fuel up via a electric lift pump, the lift pump will time out once the FSM is full. If you hand prime the FSM will be overfilled and go into the return pipe which goes to the inlet manifold. The engine will sense fuel in the return line and it will not let you start, so it wont go down in a ball of fire! It just wont start. So No Primer Bulb!.
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Old 28 June 2014, 21:41   #17
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
News to me. Thanks, guys.


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