525efi temp question
08-12-2019, 11:10 AM
#1
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525efi temp question
2007, twin 525efis. 162hours, impeller change on both 20 hours ago, Apr 2017. Recent issue last two times out, port side temp 148-152 or so, but stbd now starting to run about 6-7 degrees warmer up to 158-160. Being closed cooled, my (novice) question is does the impeller significantly impact the engine temp? Manual says check for obstructions in pick up, I think coolant was changed in 2014 at 100hr service. Should I be concerned see 158-160 temp?
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
Last edited by imartin; 08-13-2019 at 12:43 PM.
08-13-2019, 11:38 AM
#2
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2007, twin 525efis. 162hours, impeller change on both 20 hours ago, Apr 2017. Recent issue last two times out, port side temp 142-152 or so, but stbd now starting to run about 6-7 degrees warmer up to 158-160. Being closed cooled, my ( ovice) question is does the impeller significantly impact the engine temp? Manual says check for obstructions in pick up, I think coolant was changed in 2014 at 100hr service. Should I be concerned see 158-160 temp?
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
08-13-2019, 11:49 AM
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If you last changed impellers in April of 2017 like mentioned above, I would do yourself a favor and change them. Sitting that long, drying out, etc kills impellers. I always change mine at the start of the season whether I need it or not. More often, I’ve found cracking in the rubber impeller or some other detriment.
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08-13-2019, 01:09 PM
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08-13-2019, 01:30 PM
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Just sitting over the course of a winter the impellers will gain a memory/ not straighten the fins out to maintain full pressure/sidewall contact and no longer pump the same water flow as new (Impeller spins in the casing as an eccentric not a round bore)..
Impellers are cheap vs. the damage from an overheat/ down time involved
Impellers are cheap vs. the damage from an overheat/ down time involved
08-13-2019, 02:25 PM
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You have nothing to worry about. Are these readings from smartcraft? People always freak out when everything isn’t the exact same but it hardly ever is. A 6 degree difference usually doesn’t even show on analog gauges. Run it this year and put new impellers in next spring. I replace mine every year and use the old ones as backups
08-13-2019, 02:41 PM
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You have nothing to worry about. Are these readings from smartcraft? People always freak out when everything isn’t the exact same but it hardly ever is. A 6 degree difference usually doesn’t even show on analog gauges. Run it this year and put new impellers in next spring. I replace mine every year and use the old ones as backups
08-13-2019, 09:09 PM
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2007, twin 525efis. 162hours, impeller change on both 20 hours ago, Apr 2017. Recent issue last two times out, port side temp 148-152 or so, but stbd now starting to run about 6-7 degrees warmer up to 158-160. Being closed cooled, my (novice) question is does the impeller significantly impact the engine temp? Manual says check for obstructions in pick up, I think coolant was changed in 2014 at 100hr service. Should I be concerned see 158-160 temp?
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
Of note, TX temps up to 100 now so water is warmer too. Other thoughts or comments? Thx in advance.
08-13-2019, 09:59 PM
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. The engine oil cooler is the first to plug up and cause blockage. It is located at the rear, up high on the engine. Working from the front of the engine, it’s only one center bolt to remove the left side plate on the oil cooler and clean out old impeller fins or other debris. I used needle nose pliers. I also back flushed my system. It’s very hard to see. Use a mirror or cell phone to see better. You will need a new gasket.
