PDA

View Full Version : '94 PS 190 - Not Accelerating at Top End


katsjp
07-04-2012, 01:10 AM
I have a 1994 ProStart 190 EFI. During the weekend I took the boat out and accelerated great out of the hole (has powerslot) and gets up to 28mph or 31 very well. However when I am cruising at 31mph and want to go to 36, I expect that it would instantly respond and jump to the speed immediately. Instead it gets to 34 and acts like that is everything it has, I then put the throttle down more and it actually slows down! Then when I pull the throttle back a touch, the boat will accelerate by 1 or 2mph tops.

I have a OJ 4 blade, but I should be able to do 36 or 38 or even 40 with no problem. i don't care about top speed, however I should be able to get to 36mph from 32 without a problem.

Thoughts? Suggestions? Didn't see a thread out there, but point me in the direction.

bret
07-04-2012, 06:56 AM
On the bottom of the fuel pump you will find ANOTHER screen inside. Pull the pump, clean this out, change your fuel filter at the same time and your top speed will return. I had the same problems about 2 years ago, thanks to Andre, this cured mine, hope it does for yours. I bet you find small amount of paper wadding inside - most likely cause is ethanol breaking down the fuel filter media.

h2oskifreak
07-04-2012, 10:37 AM
Don't forget there are 2 fuel filters on this model.

bret
07-07-2012, 05:34 AM
Where is the second one, mine only has one and I've replaced the line all the back to the valve on the tank.

wtrskr
07-07-2012, 11:48 AM
Do you have the corvette engine or the throttle body? Not sure of this, but I beleive the corvette engine has two but the tbi does not.

katsjp
07-09-2012, 10:49 AM
I just have the standard throttle body engine. I talked to my dealer and the suggested I pull the filter out and bring it to them to order the fuel filter to be sure I get the correct one.

André
07-09-2012, 03:33 PM
I just have the standard throttle body engine. I talked to my dealer and the suggested I pull the filter out and bring it to them to order the fuel filter to be sure I get the correct one.
Did you check the screen at the inlet side of the pump under the brass barb fitting as Bret mentionned? Mine gets block with dog hairs and carpet fibers and other debris every 2 years .It's a 15 minutes job,very easy,no cost!!!ALWAYS be careful working with gas!!!
Unplug battery.
Close manual shut off valve on top of tank.
Remove electric connector from pump.
Remove hoses and tubing from pump.Use wrags or small container for whatever will drop.
Remove the brass fitting,inlet side.
Clean the screen.
Check that!
Take your filter to any car parts dealer for an instant replacement...

bret
07-14-2012, 05:58 AM
well...? Fixed or not?

katsjp
07-10-2013, 03:36 PM
Was able to get to the bottom of it, ending up replacing the fuel filter and that did it. Also changed oil, checked the fuel tank, related screens, replaced spark plugs and is now running very strong!!