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Bought this outboard with 302hrs (has 320 now just bought it this spring). Motor ran perfectly fine when I got it, once had it stall just coming back into neutral second trip out. After that point every time the engine got hot and was shut off I could not re start it without using the high idle lever. At best the engine would sputter at 500-600 rpm when the problem was occurring and when not would idle perfectly at 7-800 rpm. Problem only exists at low idle/right before neutral position in exiting gear.
Problem has progressed to the point I can no longer even start the motor without using the high idle and it won't stay running in normal idle position to allow me to shift into gear. Once it's in gear (if I get it there) it runs flawlessly to about 6000rpm (40mph in 1750 sportfish). Problem only exists idling in neutral or starting or coming back to neutral from gear once it reaches about 1200 rpm it starts again. My IAC would rattle when I first got the engine as soon as the problem happened I did light reading and changed what I wanted to preventatively. I changed all fuel filters (cup filter, vst screen before pump, in line filter), fuel water separator, all oils, thermostat, have 4 new injectors that I installed then removed because they worked the same.
Now at this point my iac will rattle at the beginning but by the time the engine has run 5min when I shut it off it won't rattle any longer. I am assuming it is the iac but I have done a lot of reading about this motor and realize it could be a few things. Ecu? Iac? Wire harnesses for the iac? I am going to bring it in to a local mechanic but they can't get me in for a couple weeks and I go to a lodge this week. I can get any parts I need in 3 days before I leave but wanted to try to consult the forums about this.
With the IAC not rattling I assume it's shot. But I know it could be a wiring issue also I am worried my ecu could be damaged if the iac failed and it kept running. If I only have the issue at idle is it safe to assume it didn't fry the ecu yet or can it damage it in an isolated way? Thanks for the help regardless if I get it fixed quick I'll keep this post updated because the forums have been tremendously helpful. Thanks.
-Patrick
Problem has progressed to the point I can no longer even start the motor without using the high idle and it won't stay running in normal idle position to allow me to shift into gear. Once it's in gear (if I get it there) it runs flawlessly to about 6000rpm (40mph in 1750 sportfish). Problem only exists idling in neutral or starting or coming back to neutral from gear once it reaches about 1200 rpm it starts again. My IAC would rattle when I first got the engine as soon as the problem happened I did light reading and changed what I wanted to preventatively. I changed all fuel filters (cup filter, vst screen before pump, in line filter), fuel water separator, all oils, thermostat, have 4 new injectors that I installed then removed because they worked the same.
Now at this point my iac will rattle at the beginning but by the time the engine has run 5min when I shut it off it won't rattle any longer. I am assuming it is the iac but I have done a lot of reading about this motor and realize it could be a few things. Ecu? Iac? Wire harnesses for the iac? I am going to bring it in to a local mechanic but they can't get me in for a couple weeks and I go to a lodge this week. I can get any parts I need in 3 days before I leave but wanted to try to consult the forums about this.
With the IAC not rattling I assume it's shot. But I know it could be a wiring issue also I am worried my ecu could be damaged if the iac failed and it kept running. If I only have the issue at idle is it safe to assume it didn't fry the ecu yet or can it damage it in an isolated way? Thanks for the help regardless if I get it fixed quick I'll keep this post updated because the forums have been tremendously helpful. Thanks.
-Patrick
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