Mercuiser 140hp stern drive

[fishrdan]

Re: Mercuiser 140hp stern drive

Can anyone tell me what year motor this is SN 2911428

71 or 72, the 140 out in my old 72 SeaSwirl was S/N 2913009

 

[Ryanlewis2010]

Re: Mercuiser 140hp stern drive

Thanks fisher also this is the seal kit i was refering to above it would work with my unit http://www.iboats.com/Gear-Housing-...1740432--**********.337667494--view_id.173049 thats a heck of a price if it works and it includes the impeller

 

[Fordiesel69]

Re: Mercuiser 140hp stern drive

That kit will work fine, but I would also opt for a new "lower pump housing" and be complete. That way if you find it to be plastic, you can replace it. If you are luky to have the alumunim lower housing, then by all means put a new oring and shaft seal on it. You will also have to stop by a local shop and have them remove the shift shaft nust to replace that bushing / seal. Don't call, or they will book you for an hour. Just show up with just the lower unit and they will more than llikely just do it or charge a tiny fee.

 

[Ryanlewis2010]

Re: Mercuiser 140hp stern drive

Thanks ford so imofficaly legal today boat and trailer lol so illlook at that part and see what works forme I still got a lil bit to do to make the engine work perfect

 

[fishrdan]

Re: Mercuiser 140hp stern drive

That seal kit will work fine. But, I agree with Ford, get the complete water pump kit with housing. I've been using #1-Alpha kits from my ol' 140 HP Mercruiser without problems, done the bellows 3-4 times since owning it the last 15 years. The bellows have a lip inside that does not mate up to the #1 drive (no groove on housings for bellows lip), I just carefully slice off the lip with an Xacto knife or razor blade and haven't had problems.

You mentioned replacing the bellows, how bad is the drive/transom assy, how long has it been since they were serviced. Just me, but I'd do the gimble bearing, shift shaft bushings, and lower shift cable, just to make sure there are not any gremlins hiding. Also, pop the extra $ for a genuine OEM Mercruiser/Quicksilver lower shift cable, if replacing the lower shift cable, it's worth the extra money.

BTW, try to change the shift shaft seal yourself, before hauling the lower down to a dealer. I've changed that seal (carrier with seals) out on my M1 drive several times.

Check your PM's, PM sent

 

[Ryanlewis2010]

Re: Mercuiser 140hp stern drive

so i shot a video of the motor running but it doesnt sound right compared to the other engines ive herd running not sure if its cuz its out of water or not but tell me if it sounds

http://www.youtube.com/watch?v=neQokC4Mhu0

 

[Ryanlewis2010]

Re: Mercuiser 140hp stern drive

also just found out that i need a valve cover gasket PO put the wrong sized one on lol

 

[Ryanlewis2010]

Re: Mercuiser 140hp stern drive

Ayuh,... It's a Model 1, with a leaking seal or 2...

Disconnect the aft ends of the trim rams to let the drive down, then ya can pull it...
It could be the ram's end caps dragging, or the drives tilt pins need greasin',...
Donno which is causin' it not to go down...

Hey bondo what you know they did need greasin i put some wd40 on the rods and sat on it n it went down like a charm

 

[Ryanlewis2010]

Merc 140hp 71 Compression

Merc 140hp 71 Compression

So i did some compression test on my beast today and i got some confusing feed back i had decided to run the thing for a lil while here and there just to kind of burn thing off and get a good reading . total run time all together for about two weeks is 30-45 mins on muffs. but today i found out i had a valve cover gasket that was leaking, so i dug a lil farther figureing why not fix everything at once i got these readings

From stern to bow

CYL4 90 no start
CYL3 85 no Start
CYL2 65 w/oil 70 No start
CYL1 110 Engine Started and ran as usual (cant say fine because it runs a lil rough)

So what do these readings mean should i look at a blown head gasket or something els

Its a 71' merc 140hp S/N2911428 and II drive

 

[Bondo]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

So i did some compression test on my beast today and i got some confusing feed back i had decided to run the thing for a lil while here and there just to kind of burn thing off and get a good reading . total run time all together for about two weeks is 30-45 mins on muffs. but today i found out i had a valve cover gasket that was leaking, so i dug a lil farther figureing why not fix everything at once i got these readings

From stern to bow

CYL4 90 no start
CYL3 85 no Start
CYL2 65 w/oil 70 No start
CYL1 110 Engine Started and ran as usual (cant say fine because it runs a lil rough)

So what do these readings mean should i look at a blown head gasket or something els

Its a 71' merc 140hp S/N2911428 and II drive

Ayuh,... That explains why the motor runs so rough,...

It's Worn Out, 'n needs to be rebuilt, or replaced...

 

[Ryanlewis2010]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

So you what should i throw on my shopping list to rebuild it (ie, just some piston rings and all the head stuff?)
Never rly rebuilt a motor just work on them and swap them out.

 

[Bondo]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

So you what should i throw on my shopping list to rebuild it (ie, just some piston rings and all the head stuff?)
Never rly rebuilt a motor just work on them and swap them out.

Ayuh,... There's Alot more to rebuildin' a motor than changin' the rings....

Pull it out, 'n drag it to a Machine Shop...
After it's torn down, 'n inspected,...
They'll tell ya how big to write the check....

 

[Ryanlewis2010]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

To bad my bank doesnt supplu me checks for free LOL Im going to do everything my self in my shed ill be clearing a spot in the morning for the motor to go but i wanted to know what parts i should need like new main and rod barrings and rings. because i dont think i will be boring the head out just hone. and i dont think there will be a need for new rods and pistons.

 

[Don S]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

and i dont think there will be a need for new rods and pistons.

Until you take it apart and inspect all the parts, there is no way of knowing which parts you need. That is why you go through the inspection part of the disassembly process in the manual.

With the compression numbers you have, I wouldn't be assuming you don't need the cylinders bored (not the head) or new pistons. You may also need to have the cranshaft turned, which means different sized bearings. You also need to get the head reworked, and you don't have the right stuff for doing heads.

 

[Ryanlewis2010]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

well im already going to send the head off to be re machined and im not ASSuming any thing im going of from previous experience that others have had(typically if the engine will run from what ive been told its normally just the rings and bearings and hone that has to be done) and i will have access to all the tools because my dad owns a full 6 bay mechanic shop w/ a trans and engine rebuild station.
But as for as for knowing the size barrings im not concerned with that i just want to know parts wise not for a shopping list w. price just what is the usual for and engine overhaul i.e example:

Reply from XXXXXXX
when i had my engine rebuilt they bored the cylinders XX
replaced main and rod baring
All the seals
and the put new rings on....

thats really all i was looking for was what typically is done

Thanks for all the help don.

world rly needs more helpful and friendly people like you

 

[Ryanlewis2010]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

Ok so long time no talk but i think im getting somewhere so in the last two days i have got the motor on my engine stand(that was probly the biggest problem i have faced with this thing right now) so when i got out of work i decided to tear down the motor and ive gotten pretty far all thats left in is the crank and pistons. im also happy that as far as i can tell (untill i get the tool to check it) that all my pistons are within specs so ill only have to hone them, with new rings, main bearings, rod inserts, and rod bearings. Then ill leave the head up to the professionals at my dads shop for like 450 full reman and painted which sould be nice here are some pics of the tear down.

 

[Fishermark]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

all my pistons are within specs so ill only have to hone them, with new rings, main bearings, rod inserts, and rod bearings.

What are rod inserts?

 

[RogersJetboat454]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

im also happy that as far as i can tell (untill i get the tool to check it) that all my pistons are within specs so ill only have to hone them

It's not so much the pistons are in spec (one look at the skirts will most of the time tell you whether they are junk or not) it's that the cylinders are in spec. The cylinders need to be measured to be sure they are within specifications.

 

[fishrdan]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

Then ill leave the head up to the professionals at my dads shop for like 450 full reman and painted

$450 for ?????

 

[Ryanlewis2010]

Re: Merc 140hp 71 Compression

Re: Merc 140hp 71 Compression

fishr 450 for the head to be machined and valve job, Roger i said pistons when i meant cylinders sorry i was tired and had just worked a full shift b4 even begin the tear down so i was dead lol. and fisher mark not sure if rod inserts are the technical term or not but if im correct (winch my info comes from my dad who runs an automotive shop) is there the pieces that hold the piston to the rod. tomorrow i will be dropping the head off to get remaned (a 2-6 week process leaning on the latter based on the timing of holidays). Also does any one know if they shave the head will i need new push rods to accommodate for the lower valves or should they still be within spec.

Thanks ryan