lookinforwalleye Posted September 4, 2012 Report Share Posted September 4, 2012 had the boat out today and my 2008 Optimax started stalling at idle and while in gear at low RPM`s It starts fine and runs perfect at speed. First thing I thought was plugs and they are the original plugs in it, any suggestions? Thanks Link to comment Share on other sites More sharing options...
hirk Posted September 4, 2012 Report Share Posted September 4, 2012 Maybe not what you want too hear but I wouldnt run it again without taking it to a GOOD opti mechanic, whatever is causing could possibly result in a blown power head.Remember what you paid for it and it may make that pill easier to swlallow. Link to comment Share on other sites More sharing options...
waso Posted September 4, 2012 Report Share Posted September 4, 2012 had the boat out today and my 2008 Optimax started stalling at idle and while in gear at low RPM`s It starts fine and runs perfect at speed. First thing I thought was plugs and they are the original plugs in it, any suggestions? Thanks Check fuel filters (should be a large and a small). Water fuel separator if u have one. Could also be something in fuel (bad fuel). Possibly Carbs could use a cleaning. Link to comment Share on other sites More sharing options...
G.mech Posted September 4, 2012 Report Share Posted September 4, 2012 (edited) Check fuel filters (should be a large and a small). Water fuel separator if u have one. Could also be something in fuel (bad fuel). Possibly Carbs could use a cleaning. Not likely a carb problem, Optimax engines are fuel injected. If the fuel filter were plugged it would be losing power at high speed before low speed and would give you a low fuel pressure alarm. If there is water in the separator (which is onboard the engine) it will give you a "water in fuel" alarm. These problems are common with older outboards but these new things are far more complex and there aren't many simple solutions. Spark plugs are rarely an issue on these engines and at $40 each it's an expensive experiment. I know the Throttle Position Sensors can cause this if they fail but you have to go to the dealer to and the problem diagnosed. The TPS and idle speed are not adjustable but are all controlled through the PCM and you need the high tech gear to figure it out. Ignition coils have also been problematic on some engines but like hirk says, it's well worth the cost to pin the problem down and get it fixed properly before anything else gets messed up...these things are pretty high tech and the old band aid fixes we used to apply to outboards don't very often work anymore. If you don't have the diagnostic equipment, you're pretty well forced to go to somebody who does unfortunately and given the cost of parts, it can be a costly adventure to just start guessing at things. Good Luck and please post when you find the problem.... Edited September 4, 2012 by G.mech Link to comment Share on other sites More sharing options...
GbayGiant Posted September 4, 2012 Report Share Posted September 4, 2012 Bad gas? Dirty injectors or just bad injectors? It is a poptamax after all. Link to comment Share on other sites More sharing options...
ecmilley Posted September 4, 2012 Report Share Posted September 4, 2012 all makes of dfi engines are complicated and require diagnostic software to properly diagnose (just like most of todays cars) much better to pay a place an hours labor for a sound diagnosis then trying to throw parts at it that may require a new powerhead Link to comment Share on other sites More sharing options...
lookinforwalleye Posted September 4, 2012 Author Report Share Posted September 4, 2012 Well looks like a trip to a marine mechanic is in order! Anybody know a good mechanic in the Orillia area, I know Leatherdale is just down the road from me but don`t know much about them! Link to comment Share on other sites More sharing options...
ecmilley Posted September 4, 2012 Report Share Posted September 4, 2012 (edited) my best recommendation would be top gun marine. #905-775-0862 there in innisfil Edited September 4, 2012 by ecmilley Link to comment Share on other sites More sharing options...
jedimaster Posted September 4, 2012 Report Share Posted September 4, 2012 Check the primer ball after it stalls. Link to comment Share on other sites More sharing options...
misfish Posted September 4, 2012 Report Share Posted September 4, 2012 my best recommendation would be top gun marine. #905-775-0862 there in innisfil X2 Paul knows his stuff. He is off of hwy 11,right side, south of 89. Cant miss it.Boats everywhere. Link to comment Share on other sites More sharing options...
lookinforwalleye Posted September 11, 2012 Author Report Share Posted September 11, 2012 X2 Paul knows his stuff. He is off of hwy 11,right side, south of 89. Cant miss it.Boats everywhere. Link to comment Share on other sites More sharing options...
lookinforwalleye Posted September 11, 2012 Author Report Share Posted September 11, 2012 Took the optimax into Leatherdale marine for a diagnosis and it was just plugs! The mechanic asked me if I had the plugs out I said no, he told me all 3 plugs were loose one almost completely out. Some jerk must have tampered with the motor! Anyways all fixed and running like new again! Link to comment Share on other sites More sharing options...
jedimaster Posted September 11, 2012 Report Share Posted September 11, 2012 WOW that is weird. Link to comment Share on other sites More sharing options...
SRT8 smoker craft Posted September 11, 2012 Report Share Posted September 11, 2012 have you had your coils changed they are in the recall all 2008-2011 mercs (not 2strokes or verado's) are on a special service bulletin and your dealer should replace them Link to comment Share on other sites More sharing options...
bigbuck Posted September 11, 2012 Report Share Posted September 11, 2012 SRT, he's got an Optimax which is a 2stroke. Not on the recall. Link to comment Share on other sites More sharing options...
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