Need new mechanical fuel pump

[glennj3]

1985 ish, MC 165. The engine was replaced. I can’t find the serial #. This pump has an extension on the plunger part that goes into the engine.
thanks

 

[alldodge]

I think your saying that you think the fuel pump on your motor needs a shaft which would run off cam shaft. If that's the case I need to know what motor you have because I'm unable to find a 4 cyl which requires one

 

[glennj3]

It’s the Mercruiser 165. 1985 model. The finger that goes into the block is longer than the one I ordered on EBay and it has an additional plate over the end, the cam hits that. Fits on the right side of the block. Thanks for looking.

 

[achris]

It’s the Mercruiser 165. 1985 model...

Can't be....

In-line 6 'Mercruiser 165' ran from 1970 to 1981. In-line 4 cylinder (the infamous '470') 'Mercruiser 165' ran from 1987 to 1989...

Is it a 6 cylinder or a 4 cylinder?

Both engines had the fuel pump on the starboard side, but neither ran an extension rod into the block. The pump lever ran directly on the cam lobe.

Chris........

Edit: Just ran through a few of your threads. You've called it an MC160, a 170 and a 165 in 3 different threads... If you don't even know what it is, how are we expected to?

 

[glennj3]

It’s the Mercruiser 165. 1985 model. The finger that goes into the block is longer than the one I ordered on EBay and it has an additional plate over the end, the cam hits that. Fits on the right side of the block. Thanks for looking.

 

[glennj3]

165 MC, 4 cylinder. I wish I could post a photo of the pump for you. My boat is a 1985 but as I said, I replaced the original 175 several years ago, so I’m not sure what year this one is. It looks like the 175 but has a different valve cover.

 

[achris]

It’s the Mercruiser 165. 1985 model. The finger that goes into the block is longer than the one I ordered on EBay and it has an additional plate over the end, the cam hits that. Fits on the right side of the block. Thanks for looking.

The 4 cylinder 165 was only 1987 to 1989. Are you buying a genuine Merc part, or some aftermarket thing? (like GLM or Sierra?) If it's genuine, you have the wrong part... If it's aftermarket, you have the wrong part. What is the part number you bought?

What is the number on the carb? (I may be able to identify your engine from that.)

165 MC, 4 cylinder. I wish I could post a photo of the pump for you. My boat is a 1985 but as I said, I replaced the original 175 several years ago, so I’m not sure what year this one is. It looks like the 175 but has a different valve cover.

My boat is 1972, that doesn't make the engine in it 1972...

Merc never configured the 3.7L as a 175... Here's a list of the 3.7L engines and their years, from the Merc parts catalogue.

 

[glennj3]

I would assume from the parts list that it is the 1987-1989 engine. Again it is possible that the valve cover was replaced too, I would not know but is says a 165. The serial # is scratched off.
it does have Drive unit # OB640563
transom unit OB758616 on the valve cover.
also the riser I think it’s called has a # stamped on it # 9856101
Im not sure where the # is on the carburetor?
it does not matter which pump I ordered on EBay. It looks just like the one that came off, but the rocker arm that goes into the engine and rides on the cam is longer than the one I ordered and it has that extra piece on it that actually rides on the cam.
ill go to NAPA tomorrow and see if I can find one.
I see it is an early pump model and is serviceable.
I took it apart and found no busted diaphragm.
the problem was that at idle the pump was pumping fuel into the top of the carburetor throat causing flooding.
maybe I can overhaul it?

 

[glennj3]

It’s a “Carter” 2A. I-2210
how can I post a picture?

 

[achris]

0B640563 shows up as a 1987, 1.84:1 drive, so if that's the drive that was with that engine, it's 1987. And yes, in '87 the 3.7 litre engine was known as a '165'. Have you looked at the back of the starboard side of the engine, just above the oil pan gasket, for a serial number plate? Have a read of this... https://forums.iboats.com/forum/eng...rcruier-stern-drive-and-engine-serial-numbers

Correct part number for the fuel pump is 8M0073435.

As the forum picture posting software appears to be 'broken', I have been posting pictures by saving them to my FTP site (a 1GB space my ISP provides with the internet connection), and then just posting the link to that address. Until the current software problem is resolved, that's all I can offer.

Chris.....

 

[Grub54891]

If the carb was overflowing, its not the pump that's the issue. It's a carb problem. The float is sticking allowing fuel to overfill and flow out. You need to rebuild the carb.

 

[Scott Danforth]

I took it apart and found no busted diaphragm.
the problem was that at idle the pump was pumping fuel into the top of the carburetor throat causing flooding.
maybe I can overhaul it?

you have dirt in your needle and seat in the carb. your fuel pump is most likely fine...... or was until you took it apart

 

[glennj3]

I found the serial #! Starboard rear. Darn I looked so many places so many times!
B770750
I can put the pump back together, no problem. It looks pretty tough.
the carburetor was rebuilt about 4 years ago. I have an in line fuel filter then a water separater, then the fuel pump.
I use non ethanol fuel. Maybe I can clean it up without removing the carburetor?
Thank you guys for being there for us!

 

[glennj3]

The pump is not working. I can’t find one like the one I removed.
im heading to see my mechanic with the pump.

 

[glennj3]

Can you help me find a pump, flange # is 60337.
thanks

 

[achris]

I found the serial #! Starboard rear. Darn I looked so many places so many times!
0B770750...

So, 1987 Mercruiser '165', model number 01651337.

Now, record those 3 serial numbers somewhere safe and easy to use whenever you start a thread, like in your post signature file... (Like most of us do. )

Can you help me find a pump, flange # is 60337.
thanks

Gave you the pump number in an earlier post. Post #10

Chris.....

 

[glennj3]

Great idea. I already wrote all those #’s in my repair book. For the rest of the story. My mechanic had one in stock but the pump lever is shorter than the original and does not have that extension on it. It does have all of the correct ID #’s though. Specifically part # 18-7282.
& 861676A1.
Strange that the one I ordered on line for $45 have the same #’s but the lever is not as long and neither has the lever as long as the original one. So I have 3 pumps with the same #s but each has a different length lever. The on line one is too short to work but the one I got from my mechanic look like it will just reach over the cam ok.

 

[alldodge]

Take a close look and see if the arms can be swapped

 

[BigWeakSauce]

No busted diaphragm doesn't mean the pump isn't toast... the rubber can stretch/dry out and provide little to no vacuum to pump with, spring can also break on the pump lever. Take the fuel line out of the carb and stick it into a clear bottle, crank the engine and see if fuel spurts out in a healthy manner, then you know if its bad.
I have the Mercruiser 165 I/L 6, 1974 and my fuel pump had a ball valve plumbed to the fuel inlet port. I broke that ball valve and replaced it but it wasn't sealed and leaking JUST ENOUGH air to cause the pump to provide weak flow and too little fuel to the carb. And FYI my fuel pump has the standard short lever, no long extension on it.
Marine Engine Dot com is a great resource if you want an exploded parts diagram for your engine, check the serial # on the block to be sure you're dealing with the right block and cam set up. Sounds like someone did some rebuild work on yours already.