Larger Filter for Boat

[Cuplable]

I was visiting my parents this Memorial Weekend who live on a lake. One moring I was going to take the boat out for a spin and popped the engine cover to check the oil and saw a big orange can staring at me. A PH30 to be exact. The boat is a 1984 and dad thinks that PH30's have been used as long as he can remember.

Being a BITOG enthusiast, I wondered if there was a larger oil filter out there that dad could use. Mainly because I've always thought that this boat's oil pressure was a little high for a given throttle setting....cold or hot. Then again, that engine has been performing without hiccup since 1984!

I just was wondering if a larger oil filter would ease that pressure back a little. I believe that the PH30 has a 13/16-16 thread and has bo bypass.

What is the largest non-bypass filter that would fit. Length of filter will not be an issue as there's at least a foot clearance.

Also, would using a filter with a bypass be a bad thing? I think I could see the downside as the engine uses only a metal strainer instead of a air filter and you'd want every drop of oil to be forced through the oil filter to get all those little particles out that get through the air intake.

Any help would be appreciated.

 

[JonS]

What engine and year? There are usually a short and long version of each filter.

 

[Gary Allan]

If you have enough room you can go all the way up to a "2 Qt" filter. This is a common Chevy V8 filter.

PB30 Fram B27 Baldwin 1069NAPA 51069 WIX

art Number: 51069
UPC Number: 765809510692
Principal Application: GM Family of Cars/Trucks (64-97)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 4.338
Outer Diameter Top: 3.660
Outer Diameter Bottom: Closed
Thread Size: 13/16-16
By-Pass Valve Setting-PSI: None
Beta Ratio: 2/20=2/26
Burst Pressure-PSI: 225
Max Flow Rate: 9-11 GPM
Nominal Micro Rating: 19

Gasket Diameters
Number O.D. I.D. Thk.
15267 3.444 3.100 0.260

Two quart size

Part Number: 51794
UPC Number: 765809517943
Principal Application: Chevrolet and GMC Trucks (73-93)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 7.822
Outer Diameter Top: 3.674
Outer Diameter Bottom: Closed
Thread Size: 13/16-16
By-Pass Valve Setting-PSI: None
Burst Pressure-PSI: 270
Max Flow Rate: 9-11 GPM
Nominal Micro Rating: 24

Gasket Diameters
Number O.D. I.D. Thk.
15267 3.444 3.100 0.260

The micron rating is a little lower ..but everything else appears to work.

This is the standard (considered) 1 quart version

Part Number: 51061
UPC Number: 765809510616
Principal Application: Chevrolet and GMC Trucks (63-90) - (Two Quart Version is 51794)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 5.178
Outer Diameter Top: 3.660
Outer Diameter Bottom: Closed
Thread Size: 13/16-16
By-Pass Valve Setting-PSI: None
Beta Ratio: 2/20=11/27
Burst Pressure-PSI: 285
Max Flow Rate: 9-11 GPM
Nominal Micro Rating: 19

Gasket Diameters
Number O.D. I.D. Thk.
15267 3.444 3.100 0.260

Basically a difference in length and maybe a minor .00x in diameter for the 2Qt

 

[Cuplable]

Gary:

Thank you for the information. My next question is...how do you do the X-ref for larger sizes on the wix website? Am I missing something?

 

[Gary Allan]

Yes, you're missing something

I've used these filters ..so I had a clue how to do it. I knew that they were available on 70's Chevy/GMC trucks. So I just plugged in the HD truck application guide from the "filter lookup" ..there they had the "2quart" reference (and two or three other part numbers) ...clicked on them ..tape and paste.

 

[Schmoe]

The oil pressure will not change if you go to a bigger filter. All that means is that you'll have to add more oil.