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  #11  
Old 05-28-2020, 05:47 PM
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88falcon 88falcon is offline
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Quote:
Originally Posted by 2010Prostar197 View Post
That plug that is circled I believe is where they bored for the camshaft.
Ah gotcha, well thanks for correcting me, learn something new everyday

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  #12  
Old 05-29-2020, 11:43 AM
TriStar190NTN TriStar190NTN is offline
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This forum is great, thanks everyone for the help. The INDMAR rep that I have been talking with calls that plug a cam shaft bore plug and says there is oil behind it. The good people on this forum and technical support from www.skidim.com (great place btw) tell me there is water behind this plug. I will hopefully do the teardown this weekend and find out for myself. I'm hoping it is something simple like a plug that can be replaced.

I drained the water out of the housing, put the hose pipe in the raw water intake, started the engine and water filled up the housing and came pouring out of the starter.

Anyone got suggestions or warnings for removing the propeller shaft, transmission, and bell housing before I get neck deep in this thing?
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  #13  
Old 05-29-2020, 11:46 AM
TriStar190NTN TriStar190NTN is offline
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88falcon, I think you are right. There is a plug back there, it might not be called a freeze plug, but it looks like it is going to be a ***** to replace. Thank you for your helpful advice. It wasn't until I sent a picture to INDMAR of the plug that they admitted there was a plug back there at all. Not to slam INDMAR, because I've had a fantastic boat engine for the past 31 seasons and they have been very responsive to my inquiries, but there's definitely a big plug back there that could blow out and cause a problem.
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  #14  
Old 05-29-2020, 11:53 AM
TriStar190NTN TriStar190NTN is offline
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Hey Waterlogged882, thanks for the helpful information! You say there are 4 freeze plugs in the heads, but I can only account for the (2) that are in the rear of the heads facing the transmission, one on each head. Where are the other 2? This forum is fantastic, you guys are very helpful and professional.
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  #15  
Old 05-29-2020, 03:59 PM
1970skier 1970skier is offline
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Thoughts

Can it be coming from the cooler on the tranny side?
Can it be coming from above the bell housing and leaking down?
Cracked block?
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  #16  
Old 05-29-2020, 05:56 PM
waterlogged882 waterlogged882 is offline
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Quote:
Originally Posted by TriStar190NTN View Post
Hey Waterlogged882, thanks for the helpful information! You say there are 4 freeze plugs in the heads, but I can only account for the (2) that are in the rear of the heads facing the transmission, one on each head. Where are the other 2? This forum is fantastic, you guys are very helpful and professional.
I agree with you. I see only two on my engine.

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  #17  
Old 05-29-2020, 09:59 PM
TriStar190NTN TriStar190NTN is offline
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1970skier, that’s the question that is going to determine the fate of my summer boating. I plan to tear into it this weekend and I will post what I find. It’s a big leak; hopefully it’s something I can fix without replacing the block.
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  #18  
Old 05-31-2020, 05:59 PM
TriStar190NTN TriStar190NTN is offline
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Source of Leak Found

I removed the flywheel and found a tiny crack in the block above the starter. You can see rusty water trickling from the corner of it. Anyone know of a repair? If not, that's probably it for my 31 year old ski boat.
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  #19  
Old 05-31-2020, 06:10 PM
TriStar190NTN TriStar190NTN is offline
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Close up of crack. Donít know why images are upside down.
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  #20  
Old 05-31-2020, 06:11 PM
TriStar190NTN TriStar190NTN is offline
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Rotate images 180 degrees.
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Tags
flywheel housing, seal failure, starter, tristar 190, water leak

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