Replacing coolant/ ECT code

[eder10986]

Welp….gotta find the leak huh?




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[eder10986]

I’ve tightened hoses at heater pump and the ones that come off the engine (name??).

Now I want to make sure that hoses are tight at the actual heater but not sure how the hell to get in there.

Any guidance would be marvelous. Thanks!




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[eder10986]

Last few things hoping y’all don’t mind…

I’ve ordered an otiker tool and clamps just in case I need to tighten more of the indmar clamps.

Do I HAVE to use indmar coolant? I see peak Sierra and prestone low tox too. They are already pre diluted. If I can use those I assume I don’t have to dilute further since indmar calls for 50/50

Lastly, to replace coolant do y’all think I have to bleed the system or can I refill at the reservoir low fill line, run to temp, then top off?

I’m referencing this (below) but I’m not 100% sure where all these lines are and if I have to do this entire procedure

https://www.indmardealersupport.com/news-letter.php


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[larry_arizona]

Sierra and low tox work

Any propylene glycol.

Just avoid ethylene glycol

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[eder10986]

Sierra and low tox work

Any propylene glycol.

Just avoid ethylene glycol

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Perfect I’ll pick some up tomorrow.

Think I need to bleed the system or top off?


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[larry_arizona]

Top it off


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[eder10986]

I got more propylene glycol. Topped off to “max” line (barely needed any, which was surprising).

I did mix it 50/50 with distilled water prior.

Ran engine on driveway. Temp reached 160F. Is that normal at idle? Seems a tad high.

Shut engine off since I can’t figure out why I can’t disengage my transmission and can’t increase rpms (yes I’ve pulled out console out and all connections are good).

After I shut engine off, coolant dropped below min, which is expected. I’ll let it cool and top off again. I did place a rag in cap and slightly opened it carefully and it was hissing which is good.

Oil was solid. Not milky or anything at all and at appropriate level.

Sea strainer clean.

Only thing I didn’t check because I ran out of time is the impeller but I replaced it two months prior so I’m hoping it’s still good.

I did run engine diagnostics and codes kept coming up when requesting. My question is 1 - do they not clear for a while, or 2 - was the engine throwing those codes again?

I can’t see it being #2 since I didn’t get above 160.

Next thoughts are:

Top off coolant once more time. Continue trying to find leak.

Impeller could be shot (but interestingly I don’t think it’s the case since when my engine temp increased idling at low speeds cooled the engine off = increased impeller speed and water flow).

Could I have a bad thermostat?

Sorry for the long post no hope this helps some of you and I appreciate your help so very much and sorry for any typos as I’m on the boat sweating and finishing this up.


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[Holdmybeer]

Not sure about the rest....
160*F is normal. 160* thermostat is standard

[eder10986]

Not sure about the rest....
160*F is normal. 160* thermostat is standard

I thought as much but for some reason I was thinking people engines ran that temp whole surfin etc. And mine was idling at that time.


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[Holdmybeer]

I thought as much but for some reason I was thinking people engines ran that temp whole surfin etc. And mine was idling at that time.


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I run 152-155 cruising, boarding, skiing.

Pulling a tube or surfing 162-165.

Just keep checking it since you are having coolant issues. I will get junk in the paddlewheel and throw a SPN110 fault (low water flow) every now and then, but temp stays right in those ranges.