[longbeachisland]

Thanks Tony. Grinder did the trick.

Pics of turbo attached. 2000 hours on these. Replacing gasket and bolts next. 

1 user thanked author for this post.

Rob Schepis

[longbeachisland]

Replacing the Medusa harness worked perfectly for me. I also went as far as using a toothbrush/corrosion X combo on all of the connection pins that attach from the engine to the Medusa.

I never changed the coolant sensors but what I did instead was unplug both coolant sensors from the engines and connected Tonys terminating resistor. https://www.sbmar.com/product/cummins-marine-smartcraft-low-coolant-circuit-resistor/

Ive been trouble free since.

[longbeachisland]

I was able to get the engine jacked up and successfully replaced a mount last weekend.

I am now considering biting the bullet and doing a few more mount replacements.

Can I mix and match mounts on the same engine? Because of the way I ordered parts from Seaboard I have 2 of the Barry mounts now and would likely pick up a few of the SMX mounts.

If so, my port engine would have 2 new Barry mounts on the front and the 2 new SMX on the rear. Is that okay?

Thanks

1 user thanked author for this post.

captainart3208

[longbeachisland]

Thanks Rob. Did my best to grab pictures of the remaining mounts. They seem to range from as bad to slightly better than the condition of the 1st mount.

[longbeachisland]

Thanks Tony – I found the issue. Your coolant sensor leak post details the exact symptoms I found.

https://www.sbmar.com/articles/cummins-marine-coolant-level-sensor-leakage-issues/

I disconnected the coolant level sensor and found coolant inside of it. I then disconnected the throttle pot connector on the wiring harness and also found coolant inside of it (pic attached).

Do I need to replace only the medusa connector at this point? or entire on-engine harness?

Engine specifics:
QSB 5.9 355 w/ ZF 80-1A
Diesel View: 4932604
SIM module: 4929301
controls: teleflex CH5660, teleflex morse electronic throttle control #311821

[longbeachisland]

Thanks Tony – I figured out the problem. Your post on the coolant sensor leak describes exactly my issue.

https://www.sbmar.com/articles/cummins-marine-coolant-level-sensor-leakage-issues/

I disconnected my coolant level sensor and I found coolant inside it. Then I disconnected the throttle connector on the wiring harness and again had coolant inside the connector (pic attached).

Do I need to replace the medusa harness only? or full on-engine harness?

[longbeachisland]

Mechanicals but they connect to an electronic throttle control (teleflexmorse branded)

[Author]

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