yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on May 27, 2015 17:27:14 GMT -6
Onetime- good job! Hey you had to take it apart a few times, but you know ALOT more about your motor. Win win.
Crabs- like they said, its a nothing job to do yourself and the mechanics charge too much for the work. One thing i would do in addition to the advice above, google the schematic for the job and have that with you, then your assured you don't miss anything small.
I bit the bullet last year and bought the verado service manual for 150 bucks. It changed my life working on that motor, best investment i ever made.
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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 19:29:32 GMT -6
Yeah don't let my experience scare you off....I'm looking forward to doing/helping my friends johnson in a couple of weeks. I learned so much. No special equipment needed just a few tricks along the way. Here are the tricks I learned: After you remove the lower unit DO NOT allow the shift rod to turn, the rod is secured through a pin that must line up and go through the hole at the top of the shift rod. if it turns on you it will become tough but can be manipulated with a pair of needle nose and flathead screwdriver. Clean out the water intake tube even after you think you've got it clear...clean some more. Glue the housing Rubber Ring down. its the largest ring that comes in the kit. I used some sealant adhesive in the groove and let it set up and get tacky before I loaded ring. Add the impeller into the housing and add a generous supply of dishwasher soap for lubrication. Add a dab of marine grease to the back of the impeller key to help hold it in place and pay attention to where the impeller will line up with the key before you advance the housing down the shaft. Find the YouTube video for your motor or something similar and watch it no less than 10 times.  Oh, and make sure all the parts are in the lower unit be for you button it back up. |
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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 19:32:58 GMT -6
1 more, Score the steering plate with a screwdriver or piece of tape that will make it line up exactly as it was before you take it off
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Post by Juan on May 28, 2015 5:48:17 GMT -6
I'm doing mine when the time comes but it's going on 9 years now since I changed the impeller and it's still pissing like a newborn. Today's impellers aren't like the impellers of old, they're built with better material and made to last, so you probably don't need a new impeller unless you frequently run in mud or sand, or you don't have a decent water stream from the pee hole.
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Post by freezerfiller on May 28, 2015 7:21:39 GMT -6
Nice job onetime!! For the carbs, You should see a small brass fitting on the front that has a small hole in it that looks like you could fit a straw from a can of sea-foam spray in there... Yep. It might be that easy.
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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 28, 2015 11:03:54 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.  The plastic housing that the drive shaft runs through or the little metal cup that the impeller sits in? I've found the OEM repair kit that does not have the plastic housing and I've found an aftermarket kit that does. I think I'd like to stick with OEM parts, but can't find an OEM kit that includes it. Do you have to buy that part separately? Where'd you get yours? Crabs |
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Post by gnrphil on May 28, 2015 12:29:29 GMT -6
I got mine from SIM Yamaha, they do a kit with the housing. The reason i say get that is because i didn't and had to reorder the housing.
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Post by Sea-Problem on May 28, 2015 17:52:38 GMT -6
Makes no difference salt or freshwater marina. No matter how many hours you run you need to change your impellers every 2 to 3 years. Not a completely accurate statement. Some manufacturers recommend after 3 years, (Merc) some recommend after a certain number of operating hours (Yamaha 200) but an impeller can last 20 minutes or 20 years depending on the environment in which it's used... Impeller changes are usually done based on hours of operation and not on any given period. Do you change your oil every 6 months or every 3,000 to 5,000 miles? I know boat owners who have owned their boats for over 10 years and have yet to change the impeller. Some people don't put many hours on their boats and run strictly in clean fresh water and because of that, their impellers last much longer than someone who logs on a lot of hours or runs frequently in sand and salt. As someone already stated, unless you just want to change your impeller for your own piece of mind, you don't need to change it at any specific time period or hours of operation. Why change something that is operating as it should? Watch your pressure gauges, water temperature and discharge stream and you'll know when it's time to change your impeller. You might find that today's impellers last a lot longer than you would think.
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Post by freezerfiller on May 29, 2015 6:13:15 GMT -6
If you go down to the grass flats, many an impeller meets its doom by grass blocking the intake and burning up the impeller due to lack of lubrication before the overheat light lets the driver know somethings wrong. There are several ways they can go bad, just like us, even if everything goes right, you can still die of old age.
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Post by Juan on May 29, 2015 7:41:54 GMT -6
Happens to me a lot...but I can actually hear a difference in the motor sound when I get grass around the lower unit.. I'll just slow, throw it in reverse long enough for the grass to float off and then continue on my way. An excellent read about water pumps & impellers : www.leeroysramblings.com/impeller_change_how_often.html |
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Post by freezerfiller on May 30, 2015 14:55:32 GMT -6
Going on year 4, I'm hoping to repower before I have to change it again.
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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 30, 2015 20:54:17 GMT -6
Well, I did mine today. I'm a lot more edumucated now. I ran into an unexpected retaining bushing and a Woodruff Key that did not want to come free. Made my 1 hour job a 3-hour job. However, when it is all said and done, it was the right thing to do. My water pressure at idle went from 1 psi to 6 psi. I can't wait to run at 4,000 RPMs and see what goes on.
Next time will be much simpler.
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Post by Juan on May 31, 2015 4:49:53 GMT -6
I don't plan to do mine again just yet... (gonna try to make the 10 year mark) but I was wondering....For those who have changed their's recently: Did you replace the entire housing or just the impeller and Where did you buy the replacement parts?
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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 31, 2015 6:10:41 GMT -6
There's a water pump repair kit that includes the impeller, cup, bolts, O-rings, bottom plate, gasket, etc.that you can find online or at your Yamaha dealer. It does not include the housing. I didn't need to replace my housing, but Gnrphil needed to change his out. The guy at the shop told me that unless it was melted, don't worry about it. Do a search for SIM Yamaha. Online OEM parts dealer. I'd use OEM parts.
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Post by gtightline on May 31, 2015 8:00:27 GMT -6
When I did mine last year, I changed everything, housing, and plate the cup, and gaskets,the woodruff key on mine was also stuck in the shaft, a little W-D 40 and a small hammer and large screwdriver took car of that problem, ... the key was replaced with a new one that came in the kit that I purchased from Boat Owners Warehouse, here in Fort Lauderdale...Here are the parts and the kits: www.boatownerswarehouse.com/category_s/2050.htm |
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Post by Juan on May 31, 2015 8:56:07 GMT -6
I'm going to go ahead and order a new one so I'll have it on hand and install it this winter if I don't need it sooner. I'm a firm believer in changing all of it and not just the impeller. I used to change only the impeller and that worked fine but someone convinced me that if the impeller needs to be changed, then the housing does too since the sand and debris that wore out the impeller probably scarred the housing slightly and replacing just the impeller would cause the new impeller to wear out quicker than if it were installed in a brand new housing.. Don't know if that's true, but it makes sense and since I have to pull the lower unit to install the impeller, might as well change it all while it's off.
I can't remember where I bought the last kit but I think I ordered it online and I had to order the housing separately.. If I can find them, I'll check with SIM to see if they have the complete kit for a Yamaha F150.
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Post by gnrphil on May 31, 2015 18:23:15 GMT -6
SIM puts together there own kits, good people and seem to care. I've order a few things from them and customer service has been excellent.
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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 Jun 1, 2015 12:28:11 GMT -6
I didn't want to jinx myself by posting to early......my motor is now pissing like a newborn baby boy and running like a top after the carb clean out. Also ran all of the gas out of the tank. Ran it Friday to burn off the seafoam/carbon and about 6 hours on the water Saturday. No issues. Moving on to disconnecting the VRO pump and solving my random electrical issues. Thanks for your help everyone
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