tbarmark's Hydrodyne 13K 73414 (Dyne 18)

Re: Hydrodyne 13K 73414

Very interesting point about water intrusion.
Although every effort was made to make sure there was an extremely positive seal at the leg into the boat (marine silicone), I have always had a very active bilge at all times out on the water. I never thought the poor condition of the paint/gelcoat could allow the kind of seepage that would result in so much water. Is this possible?

Regarding the comparison to the Dyne 'Runabout', it appears that while that model may have had a similar engine cover (as far as removable middle) mine appears to have less in common with it overall than Dyner68's '68 for example.

I'll check on the bubble to see how it's connected to the bow (if I can) & the floor to see if that offers anything.

Thanks again to you all; I truly appreciate your time. :clapping:

 

Re: Hydrodyne 13K 73414

Your water could be coming from your exhaust bellows. I've seen bad bellows sink boats very quickly...

 

Re: Hydrodyne 13K 73414

'Bellows'? Again, newby at the terminology. The exhaust from the engine which goes through the leg or...?

 

Re: Hydrodyne 13K 73414

I am not real familiar with the Volvo, but on a merc the critical bellows for leakage is the drive shaft and shift bellows. It will run without the exhaust bellows.

I had a leak which turned out to be the drain plug. I got a new one and I am careful to clean out the drain hole before I install the plug. No leaks now.

If you ski a lot the skiers will bring a lot of water in when they board the boat also.

When I say water intrusion, I mean into the hull core through fittings that are not sealed or through cracks.

jim

 

Re: Hydrodyne 13K 73414

Man, Jim's knowledge and history is impressive!

Ashley may be right on with the source of the leak: I replaced my bellows at the end of last year on my volvo outdrive. It's the rubber seal under your outdrive that covers your exhaust that can crack or get torn. Can be tough to inspect too. Mine was torn because the screws from the metal gaskets that hold it on were positioned improperly and eventually punctured holes when the motor went up/down. Fortunately the holes were above the waterline and only let in a little water. To inspect, put the outdrive all the way up and turn it to each side to inspect. May need to remove it to be sure, which is not as tough as it looks.

All Dynes (old and new, stock and refurbished) are all like family here. This thread is like waiting for Dyne DNA test results. We know the father, it's just not easy to get him to tell us when it was born.

 

Re: Hydrodyne 13K 73414

Those nicson (Nick and son) exhaust headers on the boat are collector pieces now. Nicson engineering is now out of business. They built a lot of hot rod and boat stuff going back many years.

Those generation 1 I/O's are really pretty. I like the 18 outboard prototypes with the wood deck also.

jim

 

Re: Hydrodyne 13K 73414

I heard from my mechanic at the time that Nicsons were excellent headers. I took that to mean good quality and, after taking it out on the water, quiet 'cause they really keep things low volume (Good & Bad I guess! )
Should I keep them on the boat or...?

Wow, never even thought of 'em till you mentioned it Jim.

 

Re: Hydrodyne 13K 73414

I would keep them on it. They are a great conversation piece. I'll try to find something on the company. Information is a little scarce.

jim

 

Re: Hydrodyne 13K 73414

Here is an early ad. They built flat head Ford parts also that date to the 40's.

You can do an e-bay search and find a few parts.

jim