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Go Back   SailNet Community > On Board > Gear & Maintenance > Outboard Motor Telltale Problem
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Thread: Outboard Motor Telltale Problem Reply to Thread
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Topic Review (Newest First)
07-03-2013 11:27 PM
Downbucket
Re: Outboard Motor Telltale Problem

Eureka! I discovered the problem. Behind the water jacket there are two holes. One for intake of the water and the other for exit. The exit hole was plugged. I removed the impediment and water now flows abundantly from the telltale. Now for my first sail in 1 1/2 years! Fair Winds!

Thank you all.

Will
07-03-2013 10:37 AM
Downbucket
Re: Outboard Motor Telltale Problem

Mark:

How did you clean out the cylinder head?

Overboard:

Are you referring to the telltale hole?

Thanks.

Will
07-03-2013 04:18 AM
overbored
Re: Outboard Motor Telltale Problem

Quote:
Originally Posted by MarkSF View Post
I had similar issues with my Yamaha 8hp 2 stroke and it turned out to be all kinds of bits of crap in the cylinder head. The hole in the telltale is quite small and it doesn't take much to block it.
same problem, small particles break loose and get stuck when it is running but seems clear when you shut it down. stick wire in the hole several times during running and it finally cleared out
07-03-2013 02:56 AM
MarkSF
Re: Outboard Motor Telltale Problem

I had similar issues with my Yamaha 8hp 2 stroke and it turned out to be all kinds of bits of crap in the cylinder head. The hole in the telltale is quite small and it doesn't take much to block it.
07-02-2013 06:46 PM
Downbucket
Re: Outboard Motor Telltale Problem

Thanks for your suggestions. I'm hoping a mechanic friend helps me out tomorrow.

Will
07-01-2013 09:42 AM
southshoreS24
Re: Outboard Motor Telltale Problem

check under the little plate under the impeller. I had a 1999 9.9hp johnson/evinrude that corroded there. It would not let the impeller get a good prime and caused the engine to over heat.
07-01-2013 09:10 AM
Minnewaska
Re: Outboard Motor Telltale Problem

Not familiar enough with your motor to be specific. However, it would seem like some calcification broke off somewhere. Are you literally getting that trim line through the entire system? I would use RydLyme, not vinegar. Works very well.

If the head were cracked, I would find it unusual that there would be zero water flow getting past. With all that water entering the head, it shouldn't even run.

It is also possible that the impeller is losing prime. Did you confirm the part number? Did you clean out the housing with a rough scotch pad? Random ideas.
07-01-2013 08:23 AM
Downbucket
Outboard Motor Telltale Problem

Hi:

Hoping someone might be able to help. I have a Johnson 8.0 hp, long shaft, 2001 outboard. Before launching my sailboat (Catalina 25), I changed the impeller and ran the engine in a barrel of water. No problem with water coming out telltale. Launched boat and motored to mooring. No problem. Put sails on, started engine to motor out of mooring field to the channel, and saw only intermittent drops of water from telltale for a minute then just steam. Took motor off and brought her home and did the following, all without success:

1. Checked impeller. O.K.
2. Removed the thermostat then ran engine in barrel of water.
3. Checked and cleaned intake screen.
4. Back flushed water through housing where thermostat goes.
5. Back flushed water through telltale.

Result of above: water exited every place it should except for the water tube which connects to the water pump tube grommet.

Next, I ran a pice of weed whacker trimmer line up through the water tube. There does not appear to be any blockage.

Next, took cover off of water jacket and ran trimmer line through the water hole. Again, there does not appear to be any blockage.

My next step will be to run vinegar through the housing where the thermostat goes. First, I need to replace the gasket which goes on the water jacket cover.

From my reading online and in repair manuals, if the vinegar does not work, I may need to replace the head gasket, or the head may be cracked.

Any ideas, suggestions, comments will be much appreciated. Because of an injury last summer, I was unable to sail so it's been 1 1/2 years. I am suffering from "sailing withdrawal" and desperately need a fix.

Thanks.

Will
(Portland, Maine)

 
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