Boats For Sale:
overheating issues |
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Lostinattica 
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Joined: May-20-2015 Location: Tennessee Status: Offline Points: 25 |
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 Topic: overheating issuesPosted: June-14-2015 at 5:03pm |
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Hello, I'm needing help troubleshooting my boat overheating.
I overheated on the lake yesterday and had to be towed in. I got it home and hooked the hose up to it and ran it for a good 20 mins and didn't over heat. Went to the lake this morn and it overheated in less than 5 mins. Where should I start? |
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BuffaloBFN
Grand Poobah 
Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Posted: June-16-2015 at 3:20am |
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I'm wondering what changed between the lake and house? Also, do you like to bump the ignition on the ramp before setting it in?
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Waterdog
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Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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Posted: June-16-2015 at 8:21am |
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Are ALL the hose clamps tight? Might be sucking air in at higher RPM's
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shierh
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Joined: April-29-2015 Location: Florida Status: Offline Points: 605 |
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Posted: June-16-2015 at 11:01am |
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You can crack heads when over heating. they crack between the valves.
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3363 |
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Posted: June-16-2015 at 11:17am |
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What have you fixed /had fixed lately?
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: June-16-2015 at 11:23am |
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further describe this |
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75 Tique
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Joined: August-12-2004 Location: Seven Lakes, NC Status: Offline Points: 6130 |
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Posted: June-16-2015 at 1:32pm |
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Elaborating.... If you plugged a garden hose into your intake hose, your boat will run all day in the driveway, even if your RWP is bad or if you have minor air leaks. The hose pressure is enough to push water through the engine. If you drew out of a bucket, then it is a mystery why its fine in the driveway but not on the lake. If this isn't what you did, then retest in the driveway but by sucking water out of a bucket. That will show if your pump is bad or if you have air leaks between the pump and the intake. |
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_____________
“So, how was your weekend?” “Well, let me see…sun burn, stiff neck, screwed up back, assorted aches and pains….yup, my weekend was great, thanks for asking.” |
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spiralhelix
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Joined: August-06-2014 Location: IL/WI Status: Offline Points: 496 |
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Posted: June-16-2015 at 3:05pm |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-16-2015 at 8:02pm |
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Greg, Larry answered the issue in a later post. The pressure from the hose! |
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Lostinattica
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Joined: May-20-2015 Location: Tennessee Status: Offline Points: 25 |
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Posted: June-16-2015 at 8:27pm |
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Ok everyone, I found the culprit. My impeller for the RWP was found with 2 fins.
Can anyone recommend the proper replacement? The one I pulled out says Johnson 801 but I have a feeling this isn't factory. |
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Lostinattica
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Joined: May-20-2015 Location: Tennessee Status: Offline Points: 25 |
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Posted: June-16-2015 at 8:30pm |
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BTW you guys rawk..... This site is awesome. I just wish I could post pix. I took video and pics of my step by steps for this and my shaft realignment from last month but can't seem to post them...
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8122pbrainard
Grand Poobah
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-16-2015 at 9:26pm |
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It may help to know what engine the RWP is on. |
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8122pbrainard
Grand Poobah
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: June-16-2015 at 9:30pm |
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What have you tried? Have you gone to "post reply" and not the "quick reply"? Did you see the icon of the tree with the up arrow? Try it and get back to us. Glad you found the problem. BTW, 99% of the time, a blown impeller is from running without water. They are water lubricated. |
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shierh
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Joined: April-29-2015 Location: Florida Status: Offline Points: 605 |
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Posted: June-16-2015 at 9:52pm |
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post photos of the wear plate and the inside of the back housing half. if excessive wear then the pump will work but not very good. wear plate can be honed down on oposite side with 400g sand paper on granite counter top to make it flat and smooth then use that side against the impeller.
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jhersey29
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Joined: February-20-2014 Location: Colorado Status: Offline Points: 272 |
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Posted: June-17-2015 at 1:09am |
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While your finding a new impeller, get a thermostat housing gasket. Take apart everything from the trans cooler to the thermostat and get the bits and pieces out of your thermostat housing. Lots of pieces also fall backwards and will end up on the intake side of the pump.
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Lostinattica wrote: