Toffen

Hi!!

Got the boat on water yesterday. The conditions was not ideal, but we managed to squeeze 77,0 mph out of the rig at 6.150 rpms. Normally in those conditions and in this area (Grimstad, where my dealer is located), we get 74-75 mph at 5.950-6.000 rpms. So I presumee we gained 150-200 rpms.

The fjord in Grimstad is relativ short, so you have to make a slight right turn after approx. 1.200 meters. And the turn slows you down.

I will check the speed on a another fjord where I normally get the best consistent speed (75-76 mph at 6.000 rpms), and let you know. This fjord is 10.000 meters long and conditions are normally great.

The best speed I have got is 78 mph at 6.100 rpms, but thats only once a year (in the spring). Heaven knows how it happens. Its just there.

We have doublechecked that the SVS is all up when the butterflies are fully open. The tps is set to 4.02 V using a digital voltmeter. Reccommended tps is 3,8 +- 0,25 V. Should we set the tps on the low side or as now - on the high side?

Any point of recurving the ecu? The EFI injectors are blueprinted and calibrated (excellent and all within 0,4%).

Since it is still very cold in Norway. Merely 8 degrees celcius in the water, and 12-14 Celcius in the air, the engine is running very cold. I get 145 F at idle, but at 4000 rpms + the temp drops to less than 115F. Which is too low. The termostats are all fine.

We have made a adjustable poppetvalve two years ago, and we can restrict the flow of cold water. However, the psi raises to more than 25 psi at wot (which is max reccommended psi), so we end up running too cold now anyway. I will plug one of the waterinlets to see if it helps.

When running too cold, I presume the engine does not make full horsepower - or am I wrong?

I look forward to hearing back from you.

Cheers, Toffen

tunnelvision

TOFFEN, YOU NEED TO CHECK OUT MADEFI.COM . IT'S TAYLOR MARINE I'VE SEEN WHAT HE DOES FOR A 300 PRO-MAX. CHECK OUT THE NEW COWL HE'S GOT FOR THE 300X/PRO-MAX WITH THE BUILT IN SCOOP. GOING TO GET A COUPLE FOR MY TUNNEL .HE'S GOT A FEW MOD.'S FOR THE X OUT. PUT'S THE POWER UP TO 330-35.

mmwalters

Toffen My 300pm do not seem to run as well in cold weather. One would except they would develop more power but this does not seem to be the case, for me anyhow. Keep us up dated and good luck.

Toffen

Hi!

I agree. It runs harder and do not hit hard. I will block one more waterinlet, and see if the temp rises. What kind of boat are you running?

Blackbird's Remanufactured Outboards from PENNSYLVANIA told me at www.wmi.org: "Get the motor up to temp will make way greater diff than the SVS....POwerhead"

Cheers, Toffen G

mmwalters

Toffen I run a 30' canopied motion with twins. My motors are also 1999s They do hit the rev limiters at about 6200, was thinking of having them reset.
Michael