Deleted
Deleted Member
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Post by Deleted on Aug 26, 2012 19:25:42 GMT -6
Hello all, I'm a new boat owner (2003 Sea Pro w/ Johnson 90) and am having trouble with the engine overheating. I've done some research and found that the cause of the SLOW protection system being set off may be because of a worn water pump and or thermostat. I got a quote from a mobile marine repair guy ($325) but wanted to get some advice first. Is this something that a novice boat owner should attempt to repair himself (I'm decent with a wrench) or should I go ahead and get this guy over so I can get back out on the water fast?
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Post by T-Topless on Aug 27, 2012 9:21:19 GMT -6
Johnsons are a little more difficult than Mercs or Yamahas, but you can do it.
Get a manual and replace both the impeller and cup ...
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Deleted
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Post by Deleted on Sept 11, 2012 8:55:16 GMT -6
Does it help to grease the impeller and cup before installing? I've seen it done both ways online.
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Post by T-Topless on Sept 11, 2012 10:40:09 GMT -6
Can't hurt - sure makes it easier to get in the cup (don't have the fins going the wrong way).
Most damage is done during installation - or when people run them without water.
Oddly enough, petroleum products eat rubber, so you should use a non-petroleum based grease ... but it doesn;t matter much, as it will all wash away in a few seconds anyway when you run the motor.
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Deleted
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Post by Deleted on Sept 14, 2012 17:40:49 GMT -6
Thanks, Captain. Unfortunately, after replacing the water pump and "opening" the thermostats it is still going into the SLOW protection mode. Although now I'm not getting a "hot" alarm. Could it not be the SLOW mode at all? Perhaps a fuel line issue?
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 19, 2015 16:13:32 GMT -6
Bumping this thread....I'm going through this exact issue on the exact same motor. I've got the water pump kit on the way this week. I am also experiencing the no alarm. Which is scary. its my first boat, its a 2006 Sea Boss 19 bay with a 2003 90hp Johnson, so I'm freaking out a bit but learning a ton which is kind of cool in a way. This thing was sitting for 2 years in a garage prior to me purchasing. Ran great on my watertesting, Great on Saturday with the family, and then Sunday when i decide to fish my problems showed up. idled back and now waiting on parts that will hopefully work. thanks for any replies.
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Post by freezerfiller on May 19, 2015 17:03:22 GMT -6
First check to make sure grass or algae hasn't plugged your intake. I've seen boats run great until the intake is blocked. Do you have a manual? As SC mentioned, a little more info would help. Did you notice if the water stream was a little weak?
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 19, 2015 18:32:31 GMT -6
Thanks guys. It's a 2 stroke. The water stream was a little weak on Sunday and then got strong again. Had a buddy with me when were were trying to figure things out Sunday afternoon. I could not get it past 2500 rpms before the motor started shaking and bogging. Which is consistant with the S.L.O.W mode description in the manual and directed me to the Engine overheating section. Flushed it out good when I got home. Also read the Johnson manual front to back that night. I now have a new obsession.
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,309
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Post by 985crabs on May 20, 2015 7:19:32 GMT -6
Water in fuel?
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 20, 2015 9:23:02 GMT -6
I am planning on doing a carb clean out this weekend and trying to run through the current fuel in my tank.....and then fresh fuel. I will also drain the fuel water seperator res and possibly replace the fuel line connection. I've got a busy weekend ahead. Thanks and keep the suggestions coming.
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,309
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Post by 985crabs on May 20, 2015 9:29:55 GMT -6
I'm thinking that if you believe your fuel may be foul, you might consider draining the tank before you do these other things. Otherwise, you will likely reinfect that which you have just disinfected. If that's not doable, you could pour enough HEET (fuel drier available at any auto parts store) into your tank to treat what remains.
Advice worth what you paid for it,
Crabs
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 20, 2015 12:06:05 GMT -6
Talked to my buddy that was on the boat with me when we were trying to figure this out. He said that the water pisser pressure got worse as I accelerated. 10-4 on the gas tank.. I've got a full 5 gallon of ethanol free ready for this...thanks guys
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on May 20, 2015 13:05:33 GMT -6
Talked to my buddy that was on the boat with me when we were trying to figure this out. He said that the water pisser pressure got worse as I accelerated. 10-4 on the gas tank.. I've got a full 5 gallon of ethanol free ready for this...thanks guys Your on the right track, start with the impeller. I don't know much about the johnsons and im intrigued by this slow mode. But what i can tell you is when these things sit after the water pump is old enough that there is no more grease in it, the impeller dries up and starts sticking to the pump housing and wearing it. Start with the impeller just like it sounds like your doing, then move on from there. One step at a time and you'll get there!
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 20, 2015 15:02:51 GMT -6
Awesome! Thanks everyone. I'll keep an update going after each step and the result. Maybe it will help another boater one day. Thank you
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 26, 2015 18:17:05 GMT -6
I now consider myself a pro at water pump/impeller replacement on a 90 HP Johnson outboard. it too me 2 days and a lot of frustration, some bone headed mistakes but learned a lot. The first time , I changed it, the motor would not pee at all. Removed the lower unit again and looked in the water pump housing to fine large what appeared to be grainy lake sand packed into the housing. I wish I would have taken a picture. Learned the lesson of cleaning out the water tube through both ends until the water ran clear and no debris. In the process of un installing the housing I ripped the gasket. Thankfully West Marine had 1 pack of gaskets left on the shelf. The video I watched on YouTube said to install impeller first then push the housing over the impeller while turning the shaft in a clockwise direction. This facilitated tearing the gasket. The next attempt of installing the water pump I installed the impeller in the housing and then lowering the housing down the shaft. Much better. Got the lower unit installed again only to find that I left the exhaust housing on the garage floor. Disassembled again, installed the housing, fired it up to the joy of a strong stream being seen out of the back of the motor. I have yet to water test but I feel confident. The hardest part of the multiple installs was the shift rod linkage disconnect and reconnect. I would like to personally thank my family all of you and Jody from Columbia, SC who generously helped me with talking me though a few tough spots over the phone I hope to get in on the water within the next couple of days as long as work and my family allows. I'll update and be happy to answer any questions. Thanks again everyone!! Carb clean out will be next....
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onetime
Sailor
2005 19ft Bay Sea Boss 03 Johnson 90HP Mt. Pleasant, SC
Posts: 10
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Post by onetime on May 27, 2015 6:21:11 GMT -6
Yep, previous owner originally had in saltwater down here in Charleston, then moved to Charlotte and ran it on lakes up there.....now I've got it back down in Charleston. I wish I would have taken a pic.
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,309
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Post by 985crabs on May 27, 2015 7:13:12 GMT -6
Good job by you. There's nothing simple to work on on a boat. Your experience leaves me wondering if I should attempt to do mine, which is likely overdue, or take it to the Yamaha shop who will hold it for ransom for 3 weeks before I see it again. Hmmm....
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Post by gnrphil on May 27, 2015 8:01:06 GMT -6
Crabs the Yamaha's are pretty simple, a buddy helped me with mine and we had it on and of in an hour. Top tip buy the kit complete with the housing.
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Post by gtightline on May 27, 2015 8:49:38 GMT -6
I recently did my Yamaha 115...Not bad at all. I used to pay a mechanic to do this job, but after reading about how to do it, and viewing a couple of videos on youtube I went ahead and did myself...no problem..
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,309
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Post by 985crabs on May 27, 2015 8:56:42 GMT -6
Thanks gentlemen, that is encouraging.
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