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Post Posted: Sun Sep 04, 2016 9:03 am 
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Yup one of the few I did not check. Could have been loose and we're hammered until they snapped. The shift rod and lower mounts are holding it in place.

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Post Posted: Sun Sep 04, 2016 2:38 pm 
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Damn Bruce,
That could have been much much worse, I'm sure you'll be checking the shift rod to see if it's bent. I'm sure those bolts are some kind of special alloy for strength and corrosion resistance without being 316L stainless (too soft). That's a nasty environment where those upper mounts and bolts are, salt, grime, high torque load, without anyway of washing it out. I've pulled some engines down and couldn't believe the whole midsection or steering arm just didn't fall off from corrosion in there. On an Etec do you have to pull the powerhead to replace those bolts? If so, you may want to put in new upper motor mounts to be safe.

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Post Posted: Sun Sep 04, 2016 8:12 pm 
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The bolts are replaced. Both of them broke in the exact same spot, right under the head. I got lucky in more ways than one. I didn't have to pull the powerhead, and the bolts backed right out once I removed the motor from the swivel . I think the bolts were just the wrong alloy or have a manufacturing defect. A 1/2" bolt should not fail let alone how these did. It is clear they were cracked for a long time and the small remaining portion snapped. I think they were a 316 or similar alloy. The new bolts are totally differnt looking and clearly are hardened. Surprisingly the shift rod was not bent. Pics to follow.

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Post Posted: Tue Sep 06, 2016 4:17 pm 
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Here's a few pics of the offending bolts and the replacement. Luckily I did not have to pull the power head like I thought I had to. I unbolted the lower motor mounts and pulled the engine away from the swivel bracket revealing the bolts. You can see the rusted portions of the crack indicating they were broken for a while before failing completely. Overall the replacement wasn't that bad although it did take 4-5 hours to complete.

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Post Posted: Tue Sep 06, 2016 5:20 pm 
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Bruce,
You might as well get it over with and just open your own shop!
" Give your boat wings! Take it to Wingtime's"

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Post Posted: Wed Sep 07, 2016 12:07 am 
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Pete wrote:
Bruce,
You might as well get it over with and just open your own shop!
" Give your boat wings! Take it to Wingtime's"

:1992_beer_cheer: :1992_beer_cheer:


Lol funny you should say that.... my buddy that helped me is an Inspection Authorized Aircraft mechanic!

I decided to pull one of the bolts from the twin to inspect it. Sure enough it has a crack in the same location.

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Post Posted: Wed Sep 07, 2016 5:50 am 
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Hey Bruce,
Did you happen to find the technical service bulletin about those bolts? Makes you wonder how many other Etec's are in service with those defective bolts? Those engines had 100 +\- hours on them so that's pretty scary. I've not seen where the upper mount bolts just screw into the mount, most are nut and bolt which forces you to pull the powerhead to gain access to the nut on the backside, that design allows the bolt to pass through the mount and sandwich the mount between the nut, bolt and heavy washers on either side of the mount so the bolt torque is maintained regardless of the mount condition. In the Etec design, as the mount flexes and wears the original torque becomes affected and starts to pull harder and harder on the bolt head, shifting the torque load to under the bolt head until it fails. So the fix is a higher tensile bolt but fundamentally may be how the bolt attaches to the mount. Just a guess but may explain the failure to a certain degree.

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Post Posted: Wed Sep 07, 2016 9:53 am 
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Farley I did find a service bulletin number for newer model Etecs but I have not been able to get a copy of it.

Looking at the head of the bolt I removed last night I found it is a 17-4PH hardened stainless bolt. Put simply it is a pretty serious bolt that should not fail. I did find that the alloy can be susceptible corrosion cracking which could be the case here. And your right that bolt has 102 hours on it. Scary.

I don't thing the bolt moves any once installed. It threads into a large square steel bar that runs thru the rubber mount #8. This bar is pulled tight against the aft face of the swivel brackect #20. There is about 45mm of the bolt body that is in a tight hole in the swivel. All shock and vibration movement happens within the exhaust adaptor under a large stainless plate #24.

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I'll have to see what is stamped on the new bolts to see what alloy and hardess they sre

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Post Posted: Wed Sep 07, 2016 7:54 pm 
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All I gotta say is wow!

B

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Post Posted: Tue Feb 07, 2017 12:20 am 
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Been a while since I posted about the Etecs. As many of you know I have been running the motor I overhauled on Reel Crazy for a while. So far I've put about 33 hours on it.

I haven't done much more with the twin until now. A few weeks ago I installed a new high pressure fuel pump and went over the fuel system. Everything looks nice and clean. Crazy how much of a stark contrast it was to its twin.

I replaced the water pump with a new kit. There was hardly any wear on in the cup or on the impeller for that matter.

Today I had Amy help me put the lower unit back on. Then I rigged up a temporary oil and fuel tank. I primed the oil and fuel system. Surprisingly the fuel system took almost a half gallon to prime it! I hooked up the laptop diagnostics and turned on the key. The fuel pump fired up and built up pressure as it should. I activated the oil injector pump to purge all the air out of the system. The diagnostics software showed everything was in the green so I hit the start key. After a few cranks she begain to pop and fart then she roared to life. She ran a little rough and rattled a bit as the air worked its way out of the fuel system then she settled into a nice smooth purr!

youtu.be Video from : youtu.be


sFun_crazydance

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Post Posted: Tue Feb 07, 2017 7:43 am 
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Well done! Slide the other over and reaquant them as a pair on the real crazy!

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Post Posted: Tue Feb 07, 2017 10:38 am 
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Bergertime wrote:
Well done! Slide the other over and reaquant them as a pair on the real crazy!


LOL last I was wondering what the top end a 245 with 500 HP would be. I'm thinking close to 70 mph?

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Post Posted: Wed Feb 08, 2017 7:48 am 
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If our boats were made today it prob would be somewhere close to 600 hp max. I've seen some Sea Fox 27s with twin Zuke 300s. I've also seen a 26 black water (flats style) with twin 350 vrods. My 245 does not look much different sitting next to a 27 Gamefish.. prob heavier too. Max hp back then was likely more conservative especially with limited 2 stroke options

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Post Posted: Thu Feb 09, 2017 11:13 pm 
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I have seen a guy in Tampa Bay with a 245 Osprey sporting twin 200 Etecs. I bet that sucker flies.

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Post Posted: Sat Feb 11, 2017 12:57 am 
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wingtime wrote:
I have seen a guy in Tampa Bay with a 245 Osprey sporting twin 200 Etecs. I bet that sucker flies.

Well if that is 400 total, whats an extra 100 on your boat. stirthepot.gif All your gonna need is a dual control box, 1 more oil tank and fuel line to your existing tank, and connecting rod to your steering. Should we ask Aaron if he needs to come by and talk you into it. You know he loves HP and speed sFun_eyescan


:1947_eating_popcorn:

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