2014 C 28 Volvo D-4 exhaust flapper

[Mike Wolff]

I need to know if the rubber flapper at the exhaust port on the port side aft is absolutely necessary ? Mine broke off and the exhaust port is open 100% of the time. I keep my boat in the marina in a slip that is in ocean water. I was told that it could be possible to suck salt water back into the engine? What problems could that cause? Thanks for your input.

 

[TristenT]

Hey I just had some fellas reply to my post about the exhaust flap on the c-28. I just got mine in the mail from www.marinedepotdirect.com . I haven't had a chance to install it but here's the link to my post.

viewtopic.php?f=19&t=22870

 

[Cutwater28GG]

Which model did you purchase?

Looking forward to hearing about results.

https://www.marinedepotdirect.com/stain ... cover.html

 

[dclagett]

Not sure of the D4 size, however I just purchased both of the exhaust flaps available from Marine Depot Direct. The flap sizes are as follows:

Item 7580CSE-FP is 4 5/8" in diameter
Item 7581CSE-FP is 6 5/8" in diameter

For my 2014 RT25SC D3 configuration the 4 5/8" is the perfect fit.

Hope this helps.

 

[TristenT]

The exhaust flap area on the c28 measures roughly 4.5” diameter. I ordered the smaller of the two options just didn’t feel like installing it last time I was home from work temps were in the negatives I’ll look at getting it on here in a week and a half.

 

[TristenT]

Just installed the new flap on my c28. Part number 7580cse-fp. It works fine fits the opening perfect. The pre drilled holes on the flap don’t line up you can use one of the original holes and drill one new hole. This worked fine the holes could be drilled slightly inward toward center for a slightly better fit but really not a big deal.

 

[wa7pug]

(Suggestion)L On my boat, the chrome "SS" ring around the flap was NOT in the galvanic grounding system - IF yours is not, and if the bolt goes thru to the inside of the hull, get a chunk of green wire, put good ring lugs it, and incorporate into the galvanic ground system at one of the thru bolts - it will double its life.

 

[TristenT]

(Suggestion)L On my boat, the chrome "SS" ring around the flap was NOT in the galvanic grounding system - IF yours is not, and if the bolt goes thru to the inside of the hull, get a chunk of green wire, put good ring lugs it, and incorporate into the galvanic ground system at one of the thru bolts - it will double its life.

Can you post a picture of the ring I don’t think I have that on mine

 

[wa7pug]

Looks kinda scroddy right now because I am in process of cleaning but it is this ring:
https://photos.app.goo.gl/H5SGqGXr3MbMUeJJ6
Held in place by bolts going thru hull with nuts inside - that is where I put the grounding wire in

 

[TristenT]

Looks kinda scroddy right now because I am in process of cleaning but it is this ring:
https://photos.app.goo.gl/H5SGqGXr3MbMUeJJ6
Held in place by bolts going thru hull with nuts inside - that is where I put the grounding wire in

no worries thanks. I wasn't sure if there was a different metal ring you were talking about but mine looks the same. As far has know my boat does not have a grounding system but I don't plan to add one it will be trailers most of the time.

 

[wa7pug]

Tristen,
Please forgive my directness, but even if trailered, a galvanic corrosion control system is pretty essential. Would recommend you call/email Ivan or Tim at Ranger and inquire. There are some really good articles on controlling galvanic corrosion, and I have a good article from Practical Sailor that might help you wrap your head around it .... Look in your engine compartment: there should be some green wires that are landed either on engine or gearbox ....I know Ranger installed a system on my boat and if you research in the forum, you will have more info .... In fact, my surveyor had me put a 2x6x1" zinc on the transom (water side) and had me take the factory-installed grounding to include that zinc. Obviously you will do what you will do depending upon your resources, but I urge you to protect your boat .... they put a different anode in fresh water (aluminum, if I remember right) but the concept is the same. Just do not want you to face some disappointment in the later years of owning a really fine vessel. It is a very inexpensive "insurance policy". Good luck and all the best.

 

[wa7pug]

If you want to send me your email address, I can send you a copy of a really how to/why to article on galvanic grounding ... of course it is up to you, but after a lifetime on the water, galvanic protection is a really 'must do/must understand" in my experience ... we throw enough money into the hole we call a boat without tempting fate. Anyway, please feel free: pugwerks487@gmail.com