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40' Outlaw Upgrades - Twin 900Sc to 1000hp Duramax Diesels

Old 11-12-2020, 01:57 PM
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Originally Posted by hogie roll View Post
Bad timing, it was breezy today. I probably wouldn’t be going out for a few days.
Had a bit of storm surge here in Sarasota last night before high tide. But there was no line waiting to get in at the 10th st boat ramp..




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Old 11-12-2020, 07:05 PM
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Old 11-21-2020, 04:44 AM
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Finished mocking up the gearbox oiling upgrades this week. Goal was resolve the oil leaks, double the reserve capacity, upgrade the pump design, and make it impossible to run them dry again. So I started with scraping the tank on the gearbox, moving that inboard where one can inspect and change the oil easily. Then added a gear style scavenger pump to the system, which doubles as a lift pump to the original units, which don't flow worth a crap below 3000rpm shaft speeds. Also add a 250 micron filter inline, along with low pressure, low level, and high temp alarms to the system. When engine is on, they are circulating oil. If they stop pumping, you'll know it instantly.

After removing the original oil pan on the Port unit I was able to inspect the gear teeth. They looked perfect with only the polished shine one would expect. Bearings also feel fine, so no need to crack open that case. The new gears for Stbd unit are done, but I decided last minute to replace that output shaft since it shed two of it's splines when things exploded. Consensus was it would likely hold the load, but would certainly take out a gear if it failed and stripped. So that goes to heat treating next week. Then it's bolt everything back together and hit the water again..



















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Old 11-21-2020, 04:56 AM
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Also found something useful to fill that last merc trim indicator hole in the dash. Transmission temp gauges seemed like the best choice.




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Old 11-22-2020, 07:20 AM
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Thousand percent upgrade, check change add oil.

What is the new capacity? How much was it increased? What temp trips the overheat alarm?


i have a pump, filter and cooler on my outdrive but cant find what temp to turn it on, (whats hot enough to run it?) playing around with it i've seen 30-40 degree difference between the two gauges, 1st temp gauge is in filter head approx 5 feet from the drive, 2nd temp gauge is at the end of the cooler.
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Old 11-22-2020, 02:32 PM
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The new oil tanks are 2 quart, so doubled the previous capacity. Actually coolant tanks for late 90's Mustangs. I've added couple extra bungs for temp sensor and pressure bypass from the lift pumps.

As for the temp alarm, likely around 240F but still exploring options. Finding correct idiot light switch in 1/8 NPT isn't actually that easy. However we have a couple 2-5/8 holes on the back edge in the engine bay where OEM hour meters were mounted. So looking at some cheap LED gauges with external alarm output that might do double duty.

I did pick up a couple little cheap flasher modules that will go inline with the pressure switch. If one runs out of oil, or overtemp, dash light comes on steady. If the lift pump pressure drops out, the same light will flash fast. Not sure yet how the mechanical pump will impact the lift pump pressure at high shaft speed.



Last edited by kidturbo; 11-22-2020 at 02:35 PM.
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Old 11-22-2020, 04:10 PM
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Innovation found someone to spray the lowers black once again for us. I said just rattle can em, but everyone keeps trying to make em look pretty.. Lipstick on a....

Lack of oxidation on these wasn't a good thing. LOL



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Old 11-23-2020, 02:40 AM
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Aa
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Old Yesterday, 12:54 PM
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How’s it going?
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Old Today, 03:40 PM
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Not done testing yet are you?

Todays field trip.





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