need help with lycoming h2ad

[Jon stalzer]

I recently bought a h2ad and got it on my boat and noticed oil pressure was at 10psi hot is the any other reason for low oil pressure besides main bearings before I split the case? Oil pump was a little worn and the oil pressure relief ball was a little rough and there is 7 washers in the relief valve. Also could I use angle valve cylinders in this motor or can I only use the h model cylinders

[woods and water]

Bad bearings and that is a wide deck

[Jon stalzer]

Yes it's a wide deck if you were asking so could I use 0320 angle valve cylinders if there also wide deck?

[diamondback0320]

I have h model also,dont think u can use other cylinders bcause the valve train & lifter is different

[Jon stalzer]

I have h model also,dont think u can use other cylinders bcause the valve train & lifter is different

Do you know where I can find main bearings that aren't 43 dollars+ a half?

[diamondback0320]

Pm sent jon

[Jon stalzer]

Would a fairly pitted oil pressure relief ball cause oil pressure to be this low?

[Deano]

Realistically . . . . no.

[diamondback0320]

If its not seating right I think it could imo,but could b wrong

[diamondback0320]

Does the pressure come up when u bring rpm up?

[Jon stalzer]

Oil pressure does come up but not by much. 10 psi idle to maybe 20 to 25 at 1200

[diamondback0320]

Mmm,maybe a weak spring & pitted ball,if all screens r clean,if the parts dnt cost u much Iwould try sping & ball /4 splitting case! Just a thought

[diamondback0320]

Ive owned 2 of these motors & never had a problem with low oil pressure,now have seen fluctuations & screen was dirty or pitted ball,on another note I just done top job on mine & my oil pressure changed & cant figure out why,before the top job my pressure was 75 cold at 1800rpm &70 up ta temp at same rpm & 50 idle up to temp,now whenI take off cold my gauge says 100 for bout 5minutes & then drops back to 70 running & 45-50 idle,don't understand that 1,top job has nothing to do with oil pressure,havnt got that figured out yet!

[Jon stalzer]

I was at about 30 with warm engine not hot then changed a cylinder with new rings and ran at jolly a couple weeks ago it was my first time out with my new hull and this motor. I screwed with the ball a little and my oil pressure went even lower I'm gonna grab a new ball and spring from Don George inn my way home today and see if that fixes it but I'm not getting my hopes up

[GMAC 76]

Mmm,maybe a weak spring & pitted ball,if all screens r clean,if the parts dnt cost u much Iwould try sping & ball /4 splitting case! Just a thought

X2.....weak spring AND pitted ball could easily be the problem....easy and cheap to find out!

[Jon stalzer]

On my way home with the goods well see what happens

[Jon stalzer]

On my way home with the goods well see what happens

[GMAC 76]

On my way home with the goods well see what happens

don't forget even the new spring and ball could need a few shims to get ya where ya want to be pressure wise

[Jon stalzer]

Looks better, all fixed

[diamondback0320]

Good deal bud,glad that worked for ya!