Outboard motor bogs down at low speed

Shaddad1

Cadet
Joined
Sep 9, 2021
Messages
6
Outboard motor bogs down at low speed (2,000 to 2,500rpm). Picks back up when I squeeze the bulb. Occasionally does it at high speed (5,500rpm). Only happens later in the day when the weather is hot (Florida), not early in the day and never in Pennsylvania. Motor is an Evinrude 40hp E-tec jet. What I have done to try to fix it: 1) Replaced fuel line hose from tank to fuel filter, 2) Replaced squeeze bulb, 3) replaced connecter between fuel line and tank, 4) Tightened all hose clamps on fuel lines (that I could reach), 5) Inspected and cleaned pick-ups on both 3 gal. and 6 gal. fuel tanks (happens with both tanks). My next step is to service the fuel pump (bought kit). Anyone have any ideas on what is causing this?
 

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,440
the VST float on ETECs could stick and prevent the venting of vapours which can impedd the inflow of fuel . you seem to have overridded that by hand pumping fuel

lots of topics on vapor lock on the ETEC owners board

you should visit the ETEC forum I2 section and ask owners

Explain your issue and ask the experts on the ETEC board about possibility of vapor lock in hot temperatures.
As with any ETECs you should have EV diagnostic software to see if any fault codes are logged or look at the side LEDs on the EMM to see what LED are on if any during the problem

See description...
 
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