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tommytuna

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Reply with quote  #1 
Hi Folks - i took my lower unit off to service the exhaust pressure nipple and the restrictor. I had been experiencing some strange things each time i removed the exhaust hose off EMM (struggling to get to WOT RPMS) - things would typically settle after a few rides back to normal. Only consistent pattern here was removal of the exhaust hose from EMM so this time i took lower cover off and began to pull off the other end of hose and the end of the hose literally crumbled??  i had to cut it off and now it is too short to put back on so trying to source a new hose[frown]  Pretty sure the rubber inside was crumbling and causing issues.  So bizarre as all other hoses are in tip top shape - perhaps the heat?

Is there a special sealant needed to reinstall the nipple?

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Hurricane 189 Deck boat
2012 130 HP Etec
Mod: E130DPXINA
Serial 05346711
ELGIN

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Posts: 50
Reply with quote  #2 
Hose crumbled due to the heat, the recommended sealer is gel seal II per the service manual.
tommytuna

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Posts: 127
Reply with quote  #3 
Is there an suitable alternative to Gel Seal II ? from Permatex perhaps?  i can't source locally
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Hurricane 189 Deck boat
2012 130 HP Etec
Mod: E130DPXINA
Serial 05346711
ELGIN

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Posts: 50
Reply with quote  #4 
Locktite offers an anaerobic sealer with the same properties but its expensive, you could use some cheaper options like a high temp sealer, permatex offers High Temp Red its good up to 343 C/650 F.
tommytuna

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Posts: 127
Reply with quote  #5 
Thanks - i'm a bit stuck on the replacement hose search - nobody has in stock. Is there a temp hack i could deploy?  After cutting over the damaged two inches rest of hose looks great but 1.5" too short.  Could I use 1/4" Rubber Fuel line (sold at local Princess auto).  ETEC Hose says 6.3mm which equates to 1/4".
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Hurricane 189 Deck boat
2012 130 HP Etec
Mod: E130DPXINA
Serial 05346711
ELGIN

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Posts: 50
Reply with quote  #6 
Part number 353861 $49.50 available at all warehouses. Your engine, your decision.
tommytuna

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Posts: 127
Reply with quote  #7 
yes - gonna wait it out until local guy gets one in. Looks to be in stock at Evinrude warehouse.

Did research and hose is FKM / ECO mix and has two layers. Suspect that is why it is so expensive vs. general fuel line you can get anywhere.  In meantime, Exhaust nipple looked pretty gummed up so pulled it out and soaked all day in engine tuner. Looks almost brand new now as does the little restrictor.  Given i had sooo many over heats over the years, wondering if that contributed to hose crumbling or totally unrelated? Local ETEC tech said he never had to change one ever before and never saw one crumble.

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Hurricane 189 Deck boat
2012 130 HP Etec
Mod: E130DPXINA
Serial 05346711
steelhead

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Reply with quote  #8 

The ECO is epichlorohydrin rubber, used for the outer case
FKM is a fluroroelastomer basically a Viton, used for the non-permeable inner liner.

The exhaust backpressure hose has to be the perfect OEM ID or will leak around the small brass orifice that fits inside and may leak around fitting using a generic replacement hose.

Hose is mounted to one of the hottest parts of the exhaust.

The price is shocking.

tommytuna

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Posts: 127
Reply with quote  #9 
Hi - looking up Permatex options in stock at local Canadian tire. Can use Permatex 592 High Temp Sealant? This is the one i can find locally and seems to be rated for up to 400F and for sealing threads.  Or.. do i need to go with the gasket makers which can handle hire temps -  Permatex┬« Red High Temperature RTV Gasket Maker?

Wasn't sure one would want to put gasket maker on the threads. Thanks all!

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Hurricane 189 Deck boat
2012 130 HP Etec
Mod: E130DPXINA
Serial 05346711
Tee2Sea

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Reply with quote  #10 
Having the same problem.  Dealer ordered the hose and it was supposed to be in on 7/1, but is backordered.  Problem was inconsistent operation of the exhaust valve, mostly stuck in the low speed position, so the "boost" on acceleration was missing, and max rpm was 4800. Also noticed when deceleration, the "downshift" used to be very precise and noticeable when passing 4000 rpm, but started to "flutter" between 3500 and 4000.  (FYI, when working correctly, max rpm is 5900).  Other evidence is a light coating of exhaust carbon on the fuel filter (which is white) and other light colored parts. Dealer spliced a temp hose in between till hose comes in so I can at least use the boat.  It runs fine, just missing the boost and the higher rpm, suspect the relay module may have been cooked also as there is not shifting of the valve.  Mechanically the valve works fine and was lubed with the special high temp grease.  Hope this provides some insight.  Maybe you can splice the middle so you have the OEM hose on the fittings, and the temp patch away from the high heat source.
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Tom W
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williamp7308

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Posts: 91
Reply with quote  #11 
hi as for the thread sealant i use teflon plumbing tape  works great and does not seize   you do not want stainless threads in aluminum using any locktite 
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william phelps
williamp7308

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Reply with quote  #12 
also look in mc master carr they might have the hose that would be suitable as they list all od and id dim.
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william phelps
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