Look on the back of the ECM my guess is it has either 16236009 or 16236999 which is a Delphi number for a MEFI-3. We cannot solicit to buy/sell/give but can post in the Offshore Only Wanted section.
The 861721T2 is replaced by the MEFI-4 but it to is NLA. Bob at OBD Diagnostics can test and...
I would try disconnect the plug from the Temp switch. As before one side will have power until the motor starts, then it will be ground and go to zero. You could pierce the insulation but that can cause issues later if not sealed up
If after the motor starts the lead goes to zero, you know...
Its hot riding a tractor
You have a MEFI-3 but not positive its 30 or 43. The Reg spiking is ok so long as it doesn't go above 30 for a 30 or 43 for a 43. With the motor running it should be steady at spec. Merc used 16236009 first and then 16236999 later, just not sure when they changed...
To figure out what is happening is same for gas motor, need to do a compression test. While it might be the exhaust, but I would think more a head gasket. At any rate doing a compression test will verify.
Injectors will need to be pulled
Me neither and have not accomplished flow dynamics to prove, just all are that way. Water comes in and the circulating pump is rotating CW from the front of the motor, so my pea brain believes this helps it move to the port side
12V is always present on one lead of the TKS module
The module is turned ON by a ground being applied to the other TKS lead
If there is no ground (motor cold, key not on) you should read 12V on both leads. Once motor starts the oil pressure switch grounds one lead of the TKS
The Temp switch...
Being able to keep your hand on it a few seconds then your most likely ok. Just a few degrees changes things from ok to burn. Get a IR temp gun and watch the temp.
Problem with removing the thermostat is the block can get air pockets which can cause real problems. With the thermostat...
All motors exhaust runs a bit hotter, but in the water you should always be able to keep your hand on it for a while. It higher rpms they even out.
Your saying its hot enough to burn skin?
Put meter on high ohm scale. Touch probe to case and lead (must be disconnected). Meter will start low and slowly increase to infinity. This is called a all or nothing test. Your just finding out if its shorted or opened.
Hope its not the ECM but starting to sound like it. If it is at least there are folks that can repair
The ECM applies a ground to pin 86 from J1-23. Put a meter on pin 86, there should be 12V when key is turned ON then it goes to 0V and back to 12V as the ECM switched. Check continuity of...
Said Indmar so this is like in a Malibu or similar. In this link they list the upgrade cooling. Does yours now have the upgrade as shown?
https://www.themalibucrew.com/index.php?/forums/topic/50146-indmar-monsoon-2012-cooling-system-upgrade/
