help !!! i have two spare engines 6.9 &7.3 sitting around ,Iwould like to in stall the 6.9 in to a 21 ft sunray .I can handle the adaptor plate mounts,and every thing else, BUT I cant find water cooled manifolds,Do you know anyone running a navstar in the marine field?

 

Mercury marine ran 7.3s by the thousands..........

 

Just to update there are many dealers with parts just do a search on yahoo.......I did find this article very interesting as to other requirements for sea/salt ops.......news too me even.....

http://www.glen-l.com/weblettr/weble...inizing-1.html

 

thanks PLC7.3 did the article i will be using a closed cooling system.starter will have to be well sealed..most wet manifolds from mercury were for turbo guess i can machinenew end caps,or find a turbo!

 

Yes the 7.3l motor has been used in marine application with I would say mixed success. All the ones I have seen are turbo charged and aftercooled and probably putting out about 325+ hp with the fuel turned up.

The reason I say mixed is that the motors that have made it into commercial boats are being overworked and generally do not last. The marine shop I work with is just in the process of changing out several of these 7.3l turbo motors with industrial Volvo diesels.

A 7.3l in a pleasure craft probably will work just fine as pleasure craft typically do not put on a lot of hours so it should give many years of service.

And you are right whatever you do make sure you install a closed loop cooling water system for the engine, never use sea water for cooling. Either use a KEEL Cooler or a shell and tube heat exchanger and keep changing those zinc blocks often. If you use sea water (especially salt water) for cooling I have seen brand new engines and manifolds completely destroyed (eaten out) in less than five years.

 

hamberger what are to become of those 7.3s that are being replaced, love to get my hands on the wetmanifolds and turbo dont want to buy new until i run it for a wile

 

The two engines complete with Legs, props, transoms have been removed from the boat this week and are for for sale, you would have to deal directly with the fisherman who is selling them.

I know atleast one of the two sets of exhaust manifolds is brand new. They had to be replaced last year because the old ones had cracked. Again, just not quite heavy duty enough for commercial boat service.

I don't think he wants to sell the manifolds, engines, or legs separately.

Contact Paul Meyer, "PM Marine Diesel Ltd" in Steveston, British Columbia, Canada, and he can get you in contact with the Fisherman if you are interested in buying one of the sets.

Sebastian.

 

hey thanks man ! i will try to get in touch with paul this week! i know a long haul trucker that owes me a favour if i can strike a deal,