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bunkergroup

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Posts: 252
Reply with quote  #1 
75' Running on a cat. They cop a fair bit of ingestion especially when its rough. Is the danger of this that when not being used the combustion chambers/crank can corrode ? .. Apart from redesigning my pods and getting xxl legs, so as to raise the motors. There is little I can do.
bunkergroup

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Posts: 252
Reply with quote  #2 
I run xd100 on tc-w3 setting . Would fogging after each use be any help if the motors are sitting for more than 4 weeks
rickmcd53

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Posts: 1,100
Reply with quote  #3 
I think running the winterization procedure would help to give the internals extra oil while sitting up.
If your last 10 minutes of running is at slow speed ( no wake zone) there should be no water spray ingestion so the crankcase should have clean oil in it by the time you shut it off.
bunkergroup

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Posts: 252
Reply with quote  #4 
Thanks Rick. Yes I have a good 15 mins of "no wake zone" Gladstone marina Qld. I also sit with the motors still running after dropping my deck hand (son) or deck boss as he likes to call himself.šŸ¤£ off at the ramp so he can go retrieve the car and trailer..
bunkergroup

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Posts: 252
Reply with quote  #5 
Thanks Rick. Yes I have a good 15 mins of "no wake zone" Gladstone marina Qld. I also sit with the motors still running after dropping my deck hand (son) or deck boss as he likes to call himself.šŸ¤£ off at the ramp so he can go retrieve the car and trailer..
KevNZ

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Posts: 9
Reply with quote  #6 
Does the ring gear on the flywheel look rusty?
You should consider putting snorkel's on the motor covers & duct dry air from inside the boat. 
The engine is consuming 6500 litres of air per minute at 5000RPM
Think of it as 10 times the fuel burn is water going through your engine.
NOT GOOD

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kev
bunkergroup

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Posts: 252
Reply with quote  #7 
Yes there is. I have seen some snorkeling on several cat hulls. Certainly within my capabilities of doing. Anybody out there undertaken the job or have them on their boat ??
bunkergroup

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Posts: 252
Reply with quote  #8 
KevNZ . I see in your profile a hobbie/possession/addiction šŸ˜ is boat racing. Do you have snorkel setups on those high output , high performance motors?
GEB

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Posts: 1,861
Reply with quote  #9 
Hi,
Re snorkels for outboards. Got me interested as I know nothing about them and unless Iā€™m looking in the wrong places this is all I could find.
https://www.marineengine.com/parts/mercury-marine-accessory-parts/exhaust-cooling-systems-and-extension-kits/1994-up/snorkel-kit-350-verado

Cheers
GEB

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Current. Stacer 389 Territory Strike. Model No.E25DTSLAFC
Serial No. 5503333
Sold. Stacer 399 Proline Angler Model No. E30DPSLAAB Serial No. 5375959
New South Wales
Australia 
The learner will not shear the rams.

steelhead

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Posts: 2,848
Reply with quote  #10 
Where is most of the salt water spray hitting your upper motor at? front, top, sides or back?
Coming off CAT center opening?
bunkergroup

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Posts: 252
Reply with quote  #11 
Geb. Checkout this https://www.boatsales.com.au/boats/details/1996-Kevlacat-62M-PRO-SPORT/SSE-AD-5000098?pageSource=details&id=SSE-AD-5000098
bunkergroup

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Posts: 252
Reply with quote  #12 
Same rig as mine albeit a 6,2 model . I have a 5.2 running 75's
Mlee76

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Posts: 13
Reply with quote  #13 
Hi bunkergroup. I have a jackaroo 5.5 angler cat running twin 90's. I put the post up about the rust on the oil pump bodies. What year model are your motors. Have you noticed the same. Have you taken the bottom covers off and looked at the front of the motors. There is an oil line fitting and two engine mount nuts that go a bit rusty as well. I will be doing as suggested here and rinse the motors in fresh water after each trip. As I have not owned the boat long I will be keeping an eye on how much salt appears under the cowl after a trip. I don't think my boats previous owner rinsed the motors and the salt I am seeing is an accumulation over time.
bunkergroup

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Posts: 252
Reply with quote  #14 
Steelhead. Its more mist than splashing that the motors inhale. There was a deckwash pickup running off center of the tunnel that was splashing the starboard motor. I have moved that.
bunkergroup

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Posts: 252
Reply with quote  #15 
Mlee76. I'm on my 2nd set of 07 75,s . The 2 I have now were at 60 and 80hrs when I purchased them. They are at 400hrs now.. Yes I have the side covers off regularly and have the bolts you mentioned and lower inlet manifold nuts wrapped in denso tape. Its a constant battle against corrosion.
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