COVID-19 UPDATE: How Crowley Marine is preparing & responding. Read more...
flat $3.95 shipping
My Account
Order Status
Crowley Marine: serving boaters for over 50 years
Parts in stock Most parts in stock Same day fulfillment
$3.95 shipping on all orders*
Low Price Guarantee
9.6 Pilot logo
0My cart

Select Your Engine:

Oil Reservoir Cap Assembly 36-43300A9

Satisfaction rating 5 out of 5 (95 Ratings)
$59.95
Save $7.88 (12%)
5 in stock Ships Immediately

Product Description

Mercury factory part. Click here to search for more factory parts or view parts diagrams.

2 Product Questions

Raymond Thackrey

Yes I just placed an order and I put the wrong zip code. The right one is 79403 for shipping address.

Answer:

Hello Raymond, We have change the zip code. All the best,

Thomas Childers

Will this oil cap assembly fit and work on 1984, 150hp Mercury outboard?

Answer:

Good Morning, Thomas, Could you please give us your serial number? Kindly, Diego Crowley Support

95 Product Reviews

Mercury XR4 150 1991

Got my order quick thanks
by

Right part. Ordering was easy, shipping on time.
by

Mercury 240 efi

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Right part, right price, fast shipping.
by

Problem fixed: Oil reservoir cap replacement

Easy off, easy on. Just leave the cap off and run for a little while to remove the air and allow the reservoir to fill from main tank.

175 mercury

Search for my reservoir cap started on google... the crowley sights was simple & direct. Ratings were high, so i placed my order. Initial communication was that it would be shipped right away since i paid for it... however, received an email stating it would be delayed due to high volume. Well, they got it out the same day i ordered & overcame any delay from volume. Great job by the warehouse folks! Received a day a head of promise, installed that night & was out on the boat a day before expected. Thanks to everyone at crowley!
by

1998 Mercury 150EFI

They had the part that I needed for an older Mercury at a reasonable price. I received it earlier than expected and was able to get back on the water soon after it was installed.
by

Mercury 2.0

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Very fast shipping and it was really easy to find the part I needed for my motor.
by

Problem fixed: Leaking oil

The oil cap was old and so it cracked, and was spraying oil all over the motor.

Placed and received my order on time and it was the right part . Thank you. Gene
by

by

Mercury 150 2 stroke

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: cap was cracked

discovered oil was leaking from the engine, after further searching I discovered the cap had a hairline crack. I ordered the cap and the float from Crowley Marine and took 15 minutes to install. had to convert the ground from a round connector to a but connector.

Merc Sportjet 175

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Fast shipping with the expedited option. Product was exactly as described. Will use again for any parts I need! Thanks!
by

Problem fixed: Four beep alarm won't stop

Checked oil reserve and engine mounted levels. All were sufficient. Replaced float thinking it may be faulty. Still alarmed. Replaced the cap with sensor and problem was resolved.

Mariner 200 EFI

Excellent experience. Will be my go to marine supplier from here on out.
by

by

200 mercury

by

Mercury 150 V6

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Excellent , faultless quick and easy .
by

Problem fixed: cracked oil cap

cap on oil reservoir cracked due to age its a specialist part as it has a an oil level float on it letting engine know when level is low . Found the part and number on Crowley marine super simple ordered received and on my boat within a week ! I am In UK Crowley USA everyone else 10 days plus .......thankyou .

Excellent
by

Mercury 150 Black Max

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Was a good buying experience, part arrived as stated, part fixed the issue I had and all is good, ready to put my boat back on the water to catch more crappie and bass.
by

Problem fixed: Oil reservoir cap busted

Removed old cap and attached associated wires and replaced with new cap and rewired into place, easy repair and step by step instructions. Do recommend Crowley Marine for others and myself in future purchases.

200 mercury pro max

The was exactly what I needed. The site information and pictures and part numbers made it easy to select and pay for my item. Will use again in the future.
by

ggreat got my parts a day early
by

by

by

by

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Recieved order in a timely manner and was the correct part.
by

Fantastic experience, easy to order and part came faster than I thought it would.
by

by

Exact part needed, quick ship! Will use again when in need!
by

Mercury 175

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: Shift until continuously beeping

Replaced oil reservoir cap

by

Great
by

by

by

GREAT
by

by

by

Good nice people willing to help there costumer. And me
by

Mercury 150 Black Max

Very happy with my purchase and transaction with this store!
by

Easy to navigate and fast shipping
by

QUICK AND ACCURATE SHIPMENT
by

Mariner 135

Repair Difficulty
Easy
Repair Time
Less than 30 mins
very good, will definitely use them again.
by

Problem fixed: Leaking two stroke oil

Removed the two stroke oil reservoir from under the cowl cleaned it out. Refitted it using the new cap supplied by Crowley Marine.

by

by

by

by

by

Mariner

Really quick postage. Website easy to navigate. Would defiantly use again if needed.
by

by

by

by

by

by

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Great. They did what they stated they would do.
by

The staff at The Ship's Store is always extremely helpful
by

The part was delivered as promised and on time so we could use the boat for a vacation. Thanks. jmm
by

Although the price was higher than some other offers, the realistic shipping costs pretty much made up the difference. The most attractive point was the delivery time as I was under a tight time constraint. I placed my order during the Memorial Day Holiday and, yet received the part the next business day. I was very impressed. From now on, Crowley will be my first stop in searching for parts, etc.
by

This is my second purchase from Crowley. They are wonderful to deal with and ship very quick
by

by

Great no complaints Received part sooner than expected
by

Mercury 150

by

by

by

Mercury 175

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Products spot on, just what I needed. Closed Monday's a downer for mail orders though. Thanks.
by

Problem fixed: Cracked lid on engine oil tank.

Unscrew cap, disconnect 2 wires. Repair in reverse order.

mercury black max 135 hp

Repair Difficulty
Easy
Repair Time
Less than 30 mins
No issues at all
by

Problem fixed: oil alarm going off

Replaced the oil reservoir cap inside the engine that has the float attached to it

by

promt
by

by

by

Mercury 200XL OS

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: Cracked engine oil reservoir cap

Genuine Quicksilver part had the correct whip length & bullet connection for simple replacement of cap with float level sensor wire and ground wire. The cap replacement couldn't have been easier.

by

150 Merc

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: Leaking oil--- cap cracked

Replaced oil cap assbly. Just payed attention to routing and connections of old wires

Mariner 200 Magnum

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: Oil level cap level switch

Remove old switch weave new wiring make conections.

Merc 175 XR6

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Great Price and extra fast shipping!!!
by

Problem fixed: Engine alarm

Replaced oil injection sensor.

Awesome.
by

1985 Mariner Magnum 150 Hp

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Very well laid out parts listing, drawings etc. Easy to figure out what the parts are and if they are available. Good to see that a significant number of parts are still available for my 1985 Mariner. Pricing is competitive, however shopping from Canada is expensive due to shipping and duty charges.
by

Problem fixed: Low oil alarm kept going off, replaced module, still going off, troubleshot found the problem.

After replacing the oil control module the low oil alarm finally shut off, for a few days. After it set off again I troubleshot per the service manual and determined that the module was good, etc. After removing the cowl I noticed a lot of oil entering the water and traced it back to a crack in the oil reservoir cap, under pressure leaking oil was observed. I ordered a new cap assembly from Crowley and replaced it, cleaned the electrical ground, stared the motor.............no alarm! Everything appears to working as required. The cap was defective.

Over all very good experience
by

Mercury 150 Saltwater

Repair Difficulty
Easy
Repair Time
Less than 30 mins
FLAWLESS!!!
by

Problem fixed: Oil reservoir sensor cap cracked

My oil reservoir sensor cap was cracked either from age or over-tightening by previous repair. The IDENTICAL "Quicksilver" Mercury part was identified on their website, and ordered, and took less than 4 days to arrive. Since the oil cap on the engine was cracked, and rather than attempt to remove multiple wiring harnesses, and oil tanks, I removed the replacement connectors from the wiring, and, spliced the wires to the already attached wires, using heat shrink tubing to insulate the repair. Works perfectly!

Mercury XR6

by

Mercury marine 175xr2 sport jet

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Top notch!!
by

Problem fixed: No start issue

Step by step install with the service manual in hand

by

by

Great experience
by

by

Smooth transaction and lightning fast delivery!
by

easy
by

MERCURY 150 XRI

EXCELLENT. FAST SHIPPING
by

by

Shipping was quick price was right
by

by

Excellent experience. I will continue to buy from Crowley.
by

by

by

Fantastic! Helpful people, fast emails, fast shipping, and tracking info the whole time. It was great!
by

mercury outboard v6 150hp

Repair Difficulty
Easy
Repair Time
Less than 30 mins
by

Problem fixed: 2 stroke oil leak from engine oil reservoir cap

With age and engine heat the oil reservoir cap was cracked and oil was spilling out into the engine cowl. This threaded cap had a float and two wires connected and I traced them to their connectors and wala , fixed

by

by

Mercury 135

by

Mercury

Repair Difficulty
Medium
Repair Time
Less than 30 mins
Very good
by

Product Fitment Grid

This guide is to be used as a reference only. You must verify fitment using your model or serial number.

BRAND MODEL 1986 1987 1988 1989 1990
Mariner Outboard 135 [ELPTO] x - - - -
Mariner Outboard 135 [EXLPTO] x - - - -
Mariner Outboard 135 [L] - - x x -
Mariner Outboard 135 [XL] - - x x -
Mariner Outboard 150 [CXL] - - - x -
Mariner Outboard 150 [ELPTO] x x - - -
Mariner Outboard 150 [EXLPTO] x - - - -
Mariner Outboard 150 [L] - - x x -
Mariner Outboard 150 [XL] - - x x -
Mariner Outboard 150MG [ELPTO] x - - - -
Mariner Outboard 150MG2 [ELPTO] - - x x x
Mariner Outboard 175 [CXL] - - - x -
Mariner Outboard 175 [L] - - - x -
Mariner Outboard 175 [XL] - - - x -
Mariner Outboard 220XRI [L] - x x - -
Mariner Outboard 220XRI [XL] - x x - -
Mercury Outboard 135 [ELPTO] x - - - -
Mercury Outboard 135 [EXLPTO] x - - - -
Mercury Outboard 135 [L] - - x x -
Mercury Outboard 135 [XL] - - x x -
Mercury Outboard 150 [CXL] - - - x -
Mercury Outboard 150 [ELPTO] x - - - -
Mercury Outboard 150 [EXLPTO] x - - - -
Mercury Outboard 150 [L] - - x x -
Mercury Outboard 150 [XL] - - x x -
Mercury Outboard 150XR2 [ELPTO] x x - - -
Mercury Outboard 150XR4 [ELPTO] - - x x x
Mercury Outboard 175 [CXL] - - - x -
Mercury Outboard 175 [L] - - - x -
Mercury Outboard 175 [XL] - - - x -
Mercury Outboard 200XRI - - - x -
Mercury Outboard 200XRI [ELPTO] - - - x x
Mercury Outboard 220XRI [ELPTO] - x x - -
Mercury Outboard 220XRI [EXLPTO] - x x - -
Sea Ray 135 [L] - - x - -
Sea Ray 135 [XL] - - x - -
Sea Ray 175 [SXL] - - - x -

Customers Also purchased

Parts included in this kit

Please note: Some of the included items may not be available for purchase separately and won't be listed here.

Name SKU Price Brand
Float Assembly 99022A1 Mercury Marine
Push Nut- 99265 Mercury Marine
Reservoir Gasket 43307 Mercury Marine

Supersession Chain

Name SKU Superceding SKU
Oil Reservoir Cap Assembly VIEWING THIS PRODUCT 43300A9 CURRENT
OIL RESERVOIR CAP ASSEMBLY 43300A1 43300A9
SWITCH ASSY 99024A4 43300A1
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.