What type of oil would you recommend for a hp500 carb.
the flame arrester says SAE 40 But the book says 20/50.

who carries this oil filter: WIX 51794 CAN'T FIND ANYWHERE.

WHEN USING A BUCKET AND EAR MUFFS FOR ANTIFREEZE, WHAT DO YOU THINK ABOUT DRAINING THE BLOCK, MANIFOLDS ECT FIRST THAN
RUNNING THE ANTI FREEZE THROUGH? I THINK THATS HOW I DID IT LAST YEAR AND BURN'T UP A IMPELLER.

What Oil Filter Do You Recommand ? The Wix 51794 Is A Tall Filter. The Fram Hp4 Is Much Smaller.

Thanks
Joe

As far as changing the oil again in the spring.......

A few months back Poker Runs America told a story about a guy whose carb float stuck over the winter, the gas drained down ,contaminated all the oil with gas and he wasted the engine within two hours in the spring.......doug

As far as oil filters go......this is a list for the BBC's. I'm sure there are a few sizes that are missing but these should all work:

Oil Filter
FYI:The thread type on the filter is 13/16-16.
Fram:PH5,PH13, HP4, DG5
Pureolator: L34631
Purolator Pure One: PL34631 (prefered)
AC: PF1218 AC Delco pf35, pf1218
Motorcraft: FL-12A
NAPA: 1060
Wix: 51060, 51061
K&N: HP3002 (prefered)
Amsoil: SDF-24
Hastings: LF279
Fleetguard: LF3653, LF3679
Mobil 1: M1-302 (prefered)
Baldwin: B1428 (top rated)
Mercruiser: 35-802885Q
Kendall: K31
Penzoil: PZ45
Quaker State: QS5
Shell: S63, SH38
Texaco: T38, T38B
Warner: PH1218
STP: S01218
Valvoline: V056

what about the water pressure lines & speedo hoses, Gauges? is this self draining?

I drained the blocks of my 500's but cannot start the boat and run it up to temp., no fresh water accessable. How do i get the antifreeze through the entire system without getting motor up to operating temp?

I like to drain the motors, then fill thru the t-stat housing. Also fill up the hoses. May take longer, but at least it is fool proof.

This yr for the 1st time, I decided to try the bucket and muffs method. So, with a bucket full sitting on the swim platform, started motors and waited for the 'word' that it is coming out the exhaust. Never heard the 'word', so shut motor down to investigate. Apparently the level in the bucket never dropped. Not sure why not, but guess the pump couldn't get a suction going. using 3/4 clear hose. Too small??

So, I'm guessing with the smell of burnt rubber that followed the shutting off of the motor, I probably should replace the S/W pump this spring.

You probably had a weak SW pump. You need to prime the hose before starting. I actually use a small bildge pump with a 3/4" hose to assure I have positive pressure.

Holy crap .. yall do that every year ????

Is the reason nobody just leaves the block DRY is the fear that they may have missed some water drainage?

I was told years ago by a Merc mechanic that draining the block/fittings without adding antifreeze is just fine. If you are careful and accurate in what you are draining, you will be able to get all of the damaging water out without having to add antifreeze.

Just wondering