[sterlib1971]

Larry,

Are you playing wth your trim? When WOT, start trimming up small amounts at a time. You'll should notice and feel a difference. Find a happy medium on the trim by watching your speedo. When it starts getting to high, you'll definitely see it on the speedo / feel it. I have no problem w/42 mph - 44 mph w/my 3.0, depending on conditions.

-Brad

[ColoradoDiablo]

Check over the diaphram good for any signs of cracks or warpage. If none clean it up and give it a shot. Do a preasure test on it. Don't hold me to it but I think it should be around the 6-8lb reading.

Larry

[ColoradoDiablo]

sterlib ,
I take it your talking to Gin?

Larry

[sterlib1971]

Larry,

Yeah, sorry. Looked at wrong name....

[Gin Time]

I've decided to clean up the fuel pump and keep it as a spare. A brand new one from Sierra is just $110. Small price to pay for piece of mind knowing I have a solid fuel system. New one gets picked up today so fingers crossed.

[ColoradoDiablo]

Excellent idea. Just remember to change out the filter too. That yellow line running to the carb is part of the USCG approved pump. It deverts the fuel from a blown out diaphram in the pump to the carb. Keeps it from dumping fuel into the bilge.
IE: gas leak , fumes , boat go KABOOM!!

Larry

[Gin Time]

I took her out yesterday in about 1-2 foot seas and a good 10-12 knot wind. WOT @4800-4900 RPM was 36 with just me onboard and trimming the drive up. No smoke or smell. Responded very well and ran what I consider normal. The new fuel pump definitely cured her woes. I think taking her out with water like glass and no wind she will run at 40 no problem. I also changed the Racor 5510 fuel water filter and added a bunch of Sea Foam to help clean up the fuel and tank. I am sure there is bad fuel in there and perhaps some crud at the bottom of the tank. I plan on running her a lot over the next few days to try and burn through the tank. I got 3 extra filers so I will be changing them as I go as well.
I have a 19 inch prop now and she is running high RPMs at around 4900 @ WOT. I am considering going up to a 21 pitch prop to reduce RPMs and increase WOT. No problems sacrificing some low end torque for an increase in WOT.

[ColoradoDiablo]

Good to hear Gin!!
Keep playing with her and she'll get better and better. Probably wouldn't hurt to change the oil again after you run thru maybe 3 tanks of fuel.
I am glad to hear that you are getting happier with her!

Larry

[Gin Time]

Thanks Larry. We're going out for the day on the boat tomorrow. So psyched. Installing new switches in the am before we go out. I plan on doing at least two oil changes this summer. I am considering Amsoil or Royal Purple just to make sure I have some good quality oil protecting the engine.

[ColoradoDiablo]

That's funny!!
I've been running Royal Purple in the motor and drive of the last 2 boats I have owned , plus the Diablo I now have.
I love the stuff even if it is a little pricey.
Have fun!!!!

Larry