Correct Dip Stick Part Number

aero3113

I ran my engines today. When I shut them down I let them sit and then checked the oil. They haven’t run since I did the oil change in the fall and wanted to make sure the oil level was good. I noticed that the starboard dipstick seemed a little longer than the port side. Sure enough I lined them up together and it is longer! Which one is the correct dipstick!?? The port side part number is 8M2021557 and on the starboard side all I could find was a -9 on it.

Port: 8M2021557

Starboard: -9

aero3113

Port side oil read at the halfway point and starboard was reading full. I’m pretty sure that in the spring I put the same amount of oil in each engine.

Dream_Inn

Dang!  Good catch!  Sorry, can't help with P/N

aero3113

I sent a text to my cousin, he has the same engine in his 04 24 SR. He checked and said his dipstick has a -9 on it. So I guess the longer one is correct? But what’s the PN just a -9 ?

aero3113

Would make sense that the port side was only showing at the halfway mark.

aero3113

If anyone else can verify with the same engine I would appreciate it.

aero3113

I need to do more research but I believe this is the correct part number for the longer dip stick (the -9).

861942T-9


Mercury Marine Mercruiser OEM Dipstick 861942T9 https://www.amazon.com/dp/B003903TDI/ref=cm_sw_r_cp_api_i_RUGNEb58SR7Z1

aero3113

I think the port side has a dipstick for an 8 quart pan rather then a 5 quart.

Liberty44140

Aero have you used marineengine.com to find the right part numbers for your engine? You need your engine serial number and then it gives you the right number for your parts from the drawings 

aero3113

@Liberty44140 , just did. Thanks! It shows the 861942T-9 part number.

http://www.marineengine.com/parts/mercury_marine_parts/sn/1A316620/4442077UU/13884_140

aero3113

I’m assuming that an 8 quart oil pan would be installed on a bigger engine and not installed on my 5.7?

YYZRC

Are your engine serial numbers close? Mine are 4 digits off. 

aero3113

Now I’m really confused?? I took the port dipstick and put it in the starboard side, it hardly reads on the stick. I put the starboard dipstick in the port side and it shows way over full. You can barely see in the picture but the oil is up to the “E” in Range! Any ideas????

aero3113

YYZRC said:

Are your engine serial numbers close? Mine are 4 digits off. 

Port SN: 1A316620

Starboard SN: 1A316622

Liberty44140

Glad marine engine worked! I don’t have an answer on the latest issue. My 350s had 4.5 qt pans but the boats a few years older had 5.7s which had 5.5qt pans for a long time. The POs mechanic just assumed all 5.7/350 were 5.5qt and way over filled it which I quickly learned when I changed the oil the first time. From there I filled to the dipstick, not capacity. So it sounds like whoever changed the oil for you did the same...

YYZRC

I will check my dipsticks when I get on the boat - so maybe July at this rate?!

aero3113

@Liberty44140 I changed the oil myself, I can’t remember if I just filled it or used the dipstick. I want to say I used the dipstick but could be wrong. I do remember when I sucked it out the port side seemed like it had less oil in it.

aero3113

Thanks @YYZRC

YYZRC

Which oil vac do you use?

YYZRC

aero3113 said:

Port SN: 1A316620

Starboard SN: 1A316622

I’m 1A030104 and 108

I wonder if the sequencing is different for horizon and thus the big difference in our serial numbers despite same build year?

Do you know how to decode the HIN?

aero3113

@YYZRC I don’t know how to read the serial numbers. I use this pump, it works well but might upgrade to a high quality one in the future. I modified a washing machine hose so I can screw it onto the dipstick tube.

Amarine Made 12V 60W Oil Change Pump Extractor, Oil/Diesel Fluid Pump Extractor Scavenge Oil Change Pump Transfer Suction Transfer Pump + Tubes Truck Rv Boat ATV https://www.amazon.com/dp/B082TNCJP8/ref=cm_sw_r_cp_api_i_aGKNEb0DNNZ6D

mattie

You fellas are probably taking about engine codes...

Here are the hull code deciphers - Some HINs have a country code before the HIN # 

Example HIN – ABC12345B212

ABC – Manufacturer Identification Code (MIC)

12345 – Manufacturer’s Serial Number

B2 – Manufacture date where the first digit represents the month and the second digit represent the last digit of the year.

A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=Jun, G=Jul, H=Aug, I-Sep, J=Oct, K=Nov, L=Dec

12 – Last 2 digits of the model year

reneechris14

up just -9 on the stick. My motors always read just over full with 4 1/2 quarts like between the O and the K. Never could understand run a motor under heavy load at 4000rpm and oil cooler pan should be more like 6qt. 

aero3113

Thanks @reneechris14 , that’s pretty much where my -9 stick reads on my starboard engine. I’m probably going to have to fill the port engine to the correct full mark on the 8M2021557 stick. Maybe the tubes are different length, I don’t know.

mattie

Hey aero what’s the history of your boat? You’ve been doing lots of repairs - which is cool that you document for us....

how the heck does a motor end up with the wrong dipstick. That’s weird.

reneechris14

This stick is from my 270 years ago replaced it and had the same reading. No my 342 is the same. Don't remember the part #

reneechris14

Both boats had horizons the dip stick comes up right against the alternator had to get the garden hose thingy on it for the oil change.

aero3113

Funny thing is, my 242 had the wrong dipstick also. It was too short, when I first got it I changed the oil and filled to the full mark. Went out and every so often the oil pressure would bounce and RPM’s would rev high. The crank was aerating the oil because it was too high. My 330 was owned by someone that had his mechanic do plugs, oil and filters and routine maintenance every season but didn’t pay much attention to anything else or details. 

YYZRC

mattie said:

You fellas are probably taking about engine codes...

Here are the hull code deciphers - Some HINs have a country code before the HIN # 

Example HIN – ABC12345B212

ABC – Manufacturer Identification Code (MIC)

12345 – Manufacturer’s Serial Number

B2 – Manufacture date where the first digit represents the month and the second digit represent the last digit of the year.

A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=Jun, G=Jul, H=Aug, I-Sep, J=Oct, K=Nov, L=Dec

12 – Last 2 digits of the model year

Looks like mine was a June 2007 build.

aero3113

@Alswagg , have you ever come across this?

aero3113

@mattie , I knew my 242 like the back of my hand. I want to feel the same way with my 330, it only made sense to me to go through everything.