Great thread... Even better results.. Congrats to all involved

Took the boat back down to Eddie on Friday...and picked up Triple 300's 42 up and brought back to MO.

Eddie is going to play with some spacers and do some grinding/whittling on the drive water pickups to see how it affects water pressure/oil temps. We were getting some spikes in oil temps...better safe than sorry. Aside from that, and a few little things we are having him fix...the boat is running awesome. Had several 118mph passes last week with 4 people in the boat...and a over half tank of fuel.

Oh no! Holy crap man...hate to hear this after all you have been through. I had oil temps spiking on my original set of motors - shoot me a pm if you want, and I can tell you what I had/did. Good Luck (and you got trip300 to bum off of in the meantime).

It really wasn't that big of a deal. As they trimmed the drives higher, the water pressure would drop quite a bit. That caused the oil temps to go to about 235-240*. That's not rediculously high, but higher than I would like to see them on a regular basis. More than that, we needed to get to the bottom of the water pressure issue. It would have 30 psi with the drives neutral and under 20 psi when they were trimmed positive.
We also got some 1/2" spacers to try. We put those in and need to go run it. We also removed some needless items in the engine compartment to clean it up. There was an old air pump for mufflers, waste tank plumbing that wasn't being used, etc. Just cleaning it up some by getting rid of the non essentials.
Eddie

Any pictures or video? This is like a blind man looking at a porno!

Eddie, I am a little confused here. Isn't this the same 42' that FPM, installed a single pick-up with a 22"x 10" sea strainer that feeds both engines that they have successfully run on the Kilo boats and also the Cat Killer? Plus they added 2 single pick-ups for the coolers. Usually on this set-up you can cool the drives alone with a drive shower minus the pick-up tube with some plumbing off the housing. If this is the case where they are also using the drive on top of the transom pick-up, I would be separating the drive from the engine, just a thought. That hose that transfers the water from the drive to the fitting is only 5/8" I.D. then of course it's stepped up to 1.250". Does the strainer have a bleed off for air? If not you might be aerating the water from the drives. If you add a drive spacer are you not going to slow the boat down. What was the prop slip on the boat prior to adding a spacer? Maybe Reggie, can jump in here and clarify some of these questions on the cooling system.

Yes the sea strainer & pickup are very similar to the cat killer & kilo boat. And we added 2 additional pickups at eddies request. The boat has 5 water pickups now where the kilo boat only had one & cat killer has 2. There is a bleed off on the sea strainer to allow any air to exit. The boat light on fuel with one person would run 124-125 mph, thats 12.5% slip.

Thank you Reggie, that clarifies allot. There are still allot of other pieces to puzzle.

Mark,
I haven't seen the water pressure issue yet. I'm going off of what the owner is telling me. When at Fountain, I was on the floor tuning so I never got to see the water pressure and oil temps until after we ran. Everything seemed fine at that time, but we didn't make but a few passes. Eric had the chance to run it in 95* weather for an entire day. Only at higher trim levels did he have decreased water pressure and elevated oil temps. Maybe the drives were over trimmed.....I don't know. I'll find out in a few hours when I go run it.

I'm putting the spacer in at Eric's request. I'm sure it will slow the boat a few mph. It will also help it get on plane a little quicker.

Eddie

Eddie, Is his water temp higher also? I am just wondering why, he has spikes in oil temps with a 1.750" pick-up plus the drives feeding also. Its a big question, at what RPMs does it spike and what is the temp before the spike occurs, what does it spike to? I in the past have seen this with some after market thermostat housings with a by-pass confuse the thermostat. Pretty sure your probably not running a thermostat. I know your busy with this so let us know the out come.