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Description
Exhaust Manifold Bellow 70981A3 – Fits MerCruiser 120/140/3.0L 4-Cylinder & Various V6/V8 ModelsExhaust Manifold Bellow 70981A3 Fits MerCruiser 120 140 3. 0L 4 Cylinder & Various V6 V8 Models This exhaust bellow is designed to connect the upper exhaust manifold to the elbow in various MerCruiser sterndrive engines. It is a direct fit replacement for models utilizing a wet joint exhaust system, including a wide range of 4 cylinder, V6, and V8 engines manufactured between 1982 and 2002. This part directly replaces MerCruiser 70981A3, Sierra 18
Exhaust Manifold Bellow 70981A3 – Fits MerCruiser 120/140/3.0L 4-Cylinder & Various V6/V8 Models
This exhaust bellow is designed to connect the upper exhaust manifold to the elbow in various MerCruiser sterndrive engines. It is a direct-fit replacement for models utilizing a wet joint exhaust system, including a wide range of 4-cylinder, V6, and V8 engines manufactured between 1982 and 2002.
This part directly replaces MerCruiser 70981A3, Sierra 18-2762, GLM 89070, Mallory 9-72808, and Quicksilver 70981A3.
- Material: High-durability CR (Chloroprene) rubber for longevity.
- Connection: Fits 3-inch center mounted risers connecting to 4-inch elbows.
- Application: Designed for 2-piece exhaust elbows in wet joint systems.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MerCruiser | 70981A3 |
| Quicksilver | 70981A3 |
| Sierra | 18-2762 |
| GLM | 89070 |
| Mallory | 9-72808 |
| GHmarine | 70981A3 |
| NorthBoat | 70981A3 |
| SoxaMarine | 70981A3 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 120/140 - Inline 4 | 120-140 | 4-Stroke | 1982-1995 | 70981A3 | For 153/181 CID, wet joint models |
| MerCruiser | 2.5L/3.0L | 120-140 | 4-Stroke | 1987-1995 | 70981A3 | Models with wet joint exhaust |
| MerCruiser | 175-205 - V6 | 175-205 | 4-Stroke | 1983-2002 | 70981A3 | GM 229/262 CID, wet joint models |
| MerCruiser | 200-320 - V8 S.B. | 200-320 | 4-Stroke | 1983-2002 | 70981A3 | GM 305/350/377 CID, wet joint models |
| MerCruiser | 330-370 - V8 B.B. | 330-370 | 4-Stroke | 1981-2002 | 70981A3 | GM 454/502 CID, wet joint models |
| MerCruiser | 470/485 | 170-190 | 4-Stroke | 1983-1989 | 70981A3 | 224 CID, wet joint models |
| MerCruiser | 898, 228, 250, 260, 280 | Varies | 4-Stroke | 1983-2002 | 70981A3 | Various models with wet joint exhaust |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Exhaust Bellow / Exhaust Boot |
| Installation | Upper Exhaust Manifold to Elbow Connection |
| Connection | 3-inch Center Mounted Riser to 4-inch Elbow |
| Housing Material | CR (Chloroprene) Rubber Bellow |
| Housing Color | Black |
| Dimensions | 3-inch to 4-inch diameter transition |
| Fitting Type | Hose with Clamp Connection |
| Warranty | Varies by manufacturer (1 Year for GHmarine) |
| Other Technical Attributes | Used with 2-piece exhaust elbow in wet joint applications |
Package Contents
1 x Exhaust Bellow/Boot (70981A3)
Installation Guide
- Safety First: Ensure the engine is completely cool and disconnect the battery terminals.
- Locate the Bellow: Access the exhaust system where the manifold riser connects to the exhaust elbow.
- Remove Old Clamps: Loosen and remove the hose clamps securing the old exhaust bellow at both ends.
- Remove Old Bellow: Carefully pry or cut the old bellow off the riser and elbow. Be prepared for some water to drain out.
- Clean Surfaces: Thoroughly clean the connection surfaces on both the riser and the elbow to ensure a proper seal. Remove any old sealant or rubber residue.
- Install New Bellow: Slide the new clamps over the bellow, then fit the new bellow into position, ensuring the 3-inch side is on the riser and the 4-inch side is on the elbow.
- Tighten Clamps: Position the clamps correctly over the connection points and tighten them securely. Do not overtighten, as this can damage the bellow.
- Final Check: Reconnect the battery, start the engine, and carefully check for any signs of exhaust or water leaks around the new bellow.
Troubleshooting & FAQ
How do I know if this exhaust bellow fits my MerCruiser engine?
This bellow fits specific MerCruiser models from 1982-2002 with a "wet joint" exhaust system. It is compatible with 4-Cylinder (120/140HP, 3.0L), V6 (175-205HP), and V8 (200-370HP) engines. Please verify your model and year in the compatibility table and ensure your system uses a 3-inch center riser connecting to a 4-inch elbow.
What are the signs that my exhaust bellow needs replacement?
Common signs of a failing exhaust bellow include visible cracks, splits, or perishing of the rubber. You may also notice water leaking into the engine bilge from the exhaust area or hear an unusual amount of exhaust noise in the engine compartment.
Is this part for a "wet joint" or "dry joint" system?
This part is specifically designed for wet joint exhaust systems, which were standard on MerCruiser engines from 1983 to 2002. It is not compatible with the "dry joint" systems that were introduced after 2002.
OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Outstanding Frother!
Color: Space Gray
Exceptional! This frother is in another league compared to the cheapo push button frothers. The motor is smooth, quiet and powerful. This has an intuitive thumb dial on top that operates smoothly with a wide range of smooth speed adjustment. It’s gentle enough to froth a little bit of milk for a macchiato and powerful enough to scramble 3 eggs. The head is removable for easy cleaning. It’s also rechargeable. I charged this the day I bought it on April first. I use it at least twice a day. It’s September 26th today and I have yet to recharge it and it’s not showing any signs of needing a charge. One minor quibble is that they give you 2 of the same frother heads. They are built so well, that I don’t imagine it ever wearing out. It would have been nice to get a whisk or something different. Not a deal breaker at all though.
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Reviewed in the United States on September 26, 2025
★★★★★ 5
Solid unit
Color: Black
Handheld Mixer/Frother Review
A Premium Choice That Transforms Morning Coffee
I am thoroughly impressed with this handheld mixer and frother. Each morning, I blend cacao and collagen powder into my coffee, and in the past, I always ended up with stubborn lumps using only a spoon or whisk. I had previously purchased a few inexpensive handheld mixers, but they disappointed me both in price and performance, struggling to mix the powders thoroughly—especially at the bottom of the cup. I came close to abandoning handheld mixers altogether, but decided to give it one last try.
After reading countless reviews and carefully comparing models, I opted to invest in a higher-end handheld mixer. The anticipation was high—would this mixer truly distinguish itself from the budget options cluttering my kitchen drawer? From the moment I unboxed it, the difference was clear. The mixer felt substantial in my hand, and the build quality reflected thoughtful engineering.
While this model cost roughly twice as much as the cheaper alternatives, it proved to be well worth the investment. Initially, I was concerned about the dial at the top, fearing it might be difficult to control. However, I was pleasantly surprised by its intuitive operation. The unit offers a solid feel, plenty of power, and a versatile range of speeds—from a gentle stir perfect for coffee to an impressively fast setting.
I had not previously considered using this mixer as a frother, but as a cappuccino enthusiast, I decided to give it a try. I heated both 2% milk and oat milk to take the chill off, then submerged the mixing wand. Allowing the mixer to rise above the milk introduced air and created a rich, creamy foam—an unbelievable result. My homemade cappuccino now tastes like something from a café.
The controls are robust, the construction is reliable, and the power is consistent. Cleanup is effortless, requiring only a quick rinse under the tap. The battery life is also noteworthy, lasting through several uses without losing strength.
If you are hesitant to spend a bit more on a quality handheld mixer, I wholeheartedly recommend making the investment. This mixer has become an essential part of my morning routine. Excellent product—well done!
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Reviewed in the United States on August 13, 2025
★★★★★ 5
Solid, powerful, rechargeable
Color: Black
Very impressed with its weight, speed and performance. The dial is great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 4
Very nearly the perfect frother for all your basic frothing & mixing needs
Color: Black
There are a lot of middle-of-the-road frothers out there. I've been through a few of them in my recent search for something that could mix and froth well, without taking up any more outlets in my basement kitchen. Of the three Maestri frothers I've tried so far, this one wins the race by a nose.
Most recently, these Maestri frothers come in basically three versions: A single-speed @ 8000 RPM, a two-speed @8000/5500 RPM, and this stepless variable-speed version. Aside from that, the only real difference in recent version pack-outs is which attachments they come with.
Look over the reviews of the single-speed version and you'll find that while it can and does froth well, it starts at a single, high speed and gets there fast. This makes it pretty easy to spin liquid right out of most common cups and mugs.
There is a two-speed version, but it's harder to find, only comes in one color (Grape Purple), and while it's much better than the Maestri single-speed, it still has a couple of quirks that make this variable-speed version win out.
This mixes and froths whole milk, half-and-half, or heavy whipping cream, or just about anything else very well. Like all frothers, it takes a little time to learn its nuances and nail down the technique, this will definitely get you there.
The best feature of this is easily the speed control. Turn the knob to turn it on at a low speed that's great to get things started, then turn the knob to crank up the speed just enough to do what you need, whether that's mixing or frothing. The low starting speed makes it easy to keep things under control without undue spilling, and the max speed is more than enough to make quick work of getting your froth on.
There are really only two complaints I have with this stepless, variable speed version:
- I'd really like to have a Press On / Release Off button in addition to the Speed Control knob. More than one time have I gone to turn this off, only to spin the knob the wrong way and crank the speed up to ludicrous, sloshing liquid on the counter. Being able to turn it Off just by letting go of the button would be quick and easy. This configuration would allow using a preferred speed right from the start, while still allowing speed to be adjusted on-the-fly when needed.
- Give it a bigger battery. It would cost mere pennies to give this a 2000mAH+ instead of a 1200mAH battery, and I can't think of any reasonable downside to that.
- Give the motor a little more torque. It's fairly easy for the current motor, at any speed, to get bogged down in a thick protein powder mix, or when pressing the frother or other attachment a bit too hard into the bottom or side of the frothing container. A bit more "oomph" would prevent that.
I really like the overall design and features of thes Maestri frothers better than many other, cheaper versions. This variable-speed version is pretty great as it is and probably the one I would recommend over the single- or two-speed, for most people. But I often find myself using two hands -- one to hold it steady, and the other to turn it on and tweak the knob to the desired speed(s) -- for a device that should arguably need only one hand to use. Just a couple of minor tweaks as noted above would make this the overall best frother of its type that I've used.
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Reviewed in the United States on May 23, 2025
★★★★★ 5
Hands down, the BEST handheld frother I've ever used!
Color: Black
Hands down, the BEST handheld frother I've ever used! I got the black one, but any color will have the same results.
Over the past 12 years or so, I've used so many different handheld frothers and they've ALL fallen short of expectations for quality, longevity, power, features, and usability.
I've used everything from cheap, $15 models to $50+ models and everything in-between. Some with fancy attachments for various types of mixing, frothing, beating, whipping, etc. Some with rechargeable batteries, some without. Some AC powered, some with fixed whisks, some with detachable/replaceable whisks, some with stands, etc. NONE have been spectacular. Most broke within 6 months and got tossed. ALL were major disappointments in the end, including the "revered" Zulay models of which I tried several.
I finally found this Maestri House branded, variable speed frother with detachable / replaceable whisks and got one to try. I was literally on Cloud Nine the first time I turned it on. Like, WOW! Not only was it FAST on the highest speed, but it was powerful enough to churn right through milk, eggs, cream, etc, without bogging down like many others.
This thing makes milk froth like a milkshake and Matcha Lattes like nothing else I've ever experienced. I used to have to sift my Matcha, then whisk it in hot water, then froth milk and then blend them together to make the perfect latte. and if the milk was cold (my preference), pre-whisking in hot water was a must to avoid lumps. However, with THIS frother? I literally pour my milk into a tall tumbler, drop in un-sifted Matcha powder, and spin up the Maestri House frother at first on a medium low speed to get it mixed, then jump straight to the highest speed to really whip that milk and match up. After about 30-45 seconds, I've got the thickest, richest, smoothest, most aerated latte around. And NO LUMPS at all!!! What a time and dish saver!
And cleaning? I just run it under hot running water to get the shaft cleaned and then spin it up in a dish with hot running water for a few moments, then spin it on high for a few seconds in the air to dry it off instantly.
Now, I'll be honest here, too. The specs say it can go months on a charge, using it for a couple minutes a couple times daily. Well, I guess it could do that and still spin. But I use it FULL SPEED, churning hard for at least a minute a couple times per day. After about 2 weeks, I can start to notice a speed reduction so I just plug it back in on the charger. All things considered, this is still better than all the other handheld frothers I've used over the years.
After using the heck out of this thing for the past 7 months, I've even decided to start selling these in our Japanese gift shop. The manufacturer is has been very responsive both in customer support (I called them about an issue I thought I was having, and they called me back with a couple hours even though I didn't leave voicemail when they didn't answer right away) and in reseller support. I have to give these guys an A+ for responsiveness and quick resolution when problems might arise.
HIGHLY recommended!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
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