pn for 1997 502 mag MPI's fuel pressure regulator
#1
Registered
Thread Starter
![Default](/forums/images/icons/icon1.gif)
I am going to order new regulators for my 1997 502's with VST's. Anybody have a part number handy. The "resident mechanic" at our marina let me use his pressure gauge at the end of the season as he stated with around 500hrs, he would bet they were reading low. Well he was right as Port was 34psi and SB was 38PSI.
Would everyone agree that the regulators are bad, or is there something else to look at in the VST system to alleviate the low PSI?
Would everyone agree that the regulators are bad, or is there something else to look at in the VST system to alleviate the low PSI?
#3
Registered
![Default](/forums/images/icons/icon1.gif)
I am going to order new regulators for my 1997 502's with VST's. Anybody have a part number handy. The "resident mechanic" at our marina let me use his pressure gauge at the end of the season as he stated with around 500hrs, he would bet they were reading low. Well he was right as Port was 34psi and SB was 38PSI.
Would everyone agree that the regulators are bad, or is there something else to look at in the VST system to alleviate the low PSI?
Would everyone agree that the regulators are bad, or is there something else to look at in the VST system to alleviate the low PSI?
If you experiencing vapor lock the do to things; Stop using ethanol fuel and make sure you let the engine cool down on hot days before you turn it off.
#4
Registered
Thread Starter
![Default](/forums/images/icons/icon1.gif)
Engines run fine. Yes, I have an occasional vapor lock issue if I forget to let her idle with the hatch cracked for a few minutes.
Reason I ask is because he said they should be at 43psi.
Reason I ask is because he said they should be at 43psi.
#5
Registered
![Default](/forums/images/icons/icon1.gif)
I have the same setup as you with the VST in my cruiser and I would not be worried
#6
Gold Member
![](https://www.offshoreonly.com/forums/images/icons/gold_member_star.gif)
Join Date: Oct 2004
Location: Houston, Tx
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
I have found this site VERY helpful with both the part numbers and matching engine serial numbers to what they actually are.
http://www.perfprotech.com/mercruise.../04/mercruiser
http://www.perfprotech.com/mercruise.../04/mercruiser