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Author Topic:   Returning Optimax 135 from hibernation
prm1177 posted 03-16-2003 02:02 PM ET (US)   Profile for prm1177   Send Email to prm1177  
Some of you may have followed my questions on the purchase of an Outrage 17 with an Optimax 135 from an owner who put the boat up for 2 1/2 years after only 1 season on the water.

Well I bought the boat and my mechanic has given it a clean bill (and I do mean BILL) of health after a tuneup, lower unit service, and waterpump replacement. We also replaced the zinc and installed a new battery.

I'd like to treat the engine just as if I was breaking-in a new motor; moderate RPM and a little more upper cylinder lube than required. I figure the best way to do this is to mix a little oil into the gas for a while.

Does anyone have a recommendation for how much and for how long? I was guessing around 50:1 for at least the first 50 gallons of fuel consumption. Good idea or am I an ignorant peasant?

Clark Roberts posted 03-16-2003 02:22 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
PRM, the extra oiling for break-in is automatic and controlled by the Engine Control Module (ECM) and oil is not mixed with the gas in a DFI engine as the injectors meter only raw gas and the oil is routed to crankcase via injection at throttle body... DON'T ADD OIL to GAS as this will likely compromise the fuel injectors and could cause serious problems... I'm no expert but think I'm correct on this!!!! At least check dealer/service experts.... Clark ... PS> to start engine after lay-up prime fuel with squeeze bulb, turn ignition switch to "on" and pump the throttle handle three smooth strokes and return throttle lever to neutral... this will signal the ECM to prime the injection system (you will hear an electric fuel pump running for a few seconds). After the pump stops running just turn key to start with no idle throttle at all. It's a "turnkey" operation at each start... simply turn key and ECM will take care of everything and she will settle down to a steady 600-650rpm...
prm1177 posted 03-16-2003 02:44 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Good advice about the injectors. Anyone out there know how to reset an Optimax ECM to break-in mode?
bsmotril posted 03-17-2003 10:59 AM ET (US)     Profile for bsmotril  Send Email to bsmotril     
You can reset the motor to breakin mode by doing this:
1) Turn key to "On" position with battery active
2) Push in the throttle interlock button on the side of the shifter and pump the throttle from neutral to 3/4 open 5 times in the first 10 seconds after the key is turned on.


prm1177 posted 03-17-2003 04:54 PM ET (US)     Profile for prm1177  Send Email to prm1177     
Just got the official call from Mercury Customer Service.

They say that a full service and spraying a little oil or fogging spay in the cylinders is sufficient. No need to treat the motor any differently as the metal surfaces have alredy honed themselves in the original break-in.

That said, I will be gentle my first time out. Thanks for all the great advice.

frank_king posted 03-21-2003 08:19 AM ET (US)     Profile for frank_king  Send Email to frank_king     
bills the only way to reset the motor to "break in mode" is to hook up the DDT.

DDT is a hand held "computer" that can tell you alot of info about motor and it will point you in the right direction to what is wrong with it.

the only thing that happens to the motor when someone does what you said is prime the oil pump.

doing this removes air from the oil system that may have occured during shipping.

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