Need help in identifying my outboard

[Jeff Oosse]

New member here.... I recently bought a smaller boat and am having a hard time identifying the motor. The previous owner says it is a 110 hp mercury motor. I can not determine the year but from the FAQs and searching through posts I think it is a 1976. The S/N falls in that year range but I could be wrong. The S/N is 45925**, I'm hoping it is an actual 110 hp motor and not the model 110, 9.8hp.

We took it out and it would not plane the 16' foot boat. I think it's gunned up from 2 years of sitting after the supposed rebuild. That's another topic for later.

Thanks all, I've learned a ton just by reading the posts here too.

 

[gm280]

:welcome: aboard Jeff Oosse. Always great to welcome a new member...

Some how I would think that if it was a mere 9.8HP engine, you would know it just from the size difference between the 9.8HP and a 110HP engine. One way you can check is to look and see how many spark pugs it has. If it has more then two, it is not a 9.8HP model.

 

[ThomW]

Hey there. It should be obvious if its a 110 or a 110 (9.8) as one would weigh maybe 50 lbs and the other would be closer to 200+ lbs. Is there a model number? The serial number you have does sync with a 1976 9.8 motor. Like GM said, check and see how many plugs ya got. That will tell you. honestly though, the size alone should tell you your answer. Post a picture and we can definitely give you your answer.

 

[Jeff Oosse]

I tried to post up the pictures I took with my phone but it's giving me an invalid file, even though it's a .jpg. But anyway, it has 4 sparkplugs and dual carbs on it. It does have the power trim kit and it's pretty hefty, so I would think its one of the bigger motors. I'm thinking the reason its sluggish is because it sat so long. Maybe a tune-up is in order? When we pulled the plugs, 1,3 and 4 were clean but 2 was a tad dirty. Not horrible but dirtier than the rest.
As for it being the 9.8 hp, I had my doubts but with all the little things I've been finding, it wouldn't surprise me. I knew there would be some issues but not knowing the year of the motor makes it difficult to order parts. I honestly believe it is a 1976 110 hp motor though.

 

[flyingscott]

If it is a 4 cylinder probably a 65 or an 85 hp. Anything over 90 hp from Mercury in the 70s would have been an I6 TOP motor you would have 6 plugs not 4. I would put my money on a 85 hp using the serial # also Mercury never made a 110 HP motor.

85

1977

EL

4590512 - - UP

7091098

 

[Jeff Oosse]

Hmmmm.... I used the chart in the FAQ section, well, the one that wasn't dead. and it listed a 110hp in 1976 but hey, what do I know? That's why I'm here I'm soaking up Oops knowledge on re-decking... But I want to make sure that the motor is correct. BTW, this motor is pushing a 1972 16' Caravelle.
this is the one I used from the sticky ... http://www.autorepairmanuals.biz/page/609774 .... down there at the 110hp one, it lists one there... but I see the 850 (85.0) as well.....

Man, I wish I could post these pictures. The odd thing is I was looking at pics for all 3 motors and don't really see anything on my wrap around that denotes it as anything. It just has the blue looking M and no other markings for a model number or anything. It does have a thunderbolt ignition saying on the front cover but that could be a different cover as it has red lettering not blue like the rest of the decals.

 

[gm280]

Jeff, your pictures may be too large in size to post. Try taking lower resolution shots and see if they will post. I think anything under 700kb will work. JMHO

 

[GA_Boater]

Now that you have 3 posts, the newbie photo attaching restriction is lifted.

Click on the Forum Help link in the sig below and look at the tutorial for attaching photos.

Welcome to iboats, Jeff.

 

[flyingscott]

I use www.maxrules.com to find all my Mercury serial #s as I have found it to be the best and most comprehensive list. The 110 hp you found is a 2 yr model only and maxrules does not even list it. Your serial # does not even fall in the range for the 110 hp on the list you found.. If that 110 hp was made in 1966/67 could very well have been it would still be a 6 cylinder not 4. They do not list a 110 hp in 1976 what Mercury did with that motor was put 110 decals on a 9.8 hp motor. Mercury in the late 60s and 70s was add a 0 to the hp ratings. A 115 motor would have 1150 decals on it a 150 hp would be called a 1500 a 9.8 hp was called a 110 and so on.

 

[Jeff Oosse]

No Title

I looked at that chart again... the first number is the model number... lol... but looking at the ranges of serial numbers it could be anywhere from a 70 to a 115.... from all different years... I cropped this one to be able to upload it... I will crop the others a bit to see if they will upload...

 

[flyingscott]

Put a pic up of the powerhead. The 70 hp in those years was a 3 cylinder anything bigger than 90 was a 6 cylinder. With 4 cylinders the only motor that lines up is an 85 hp.

 

[Jeff Oosse]

I think you are right... I can't get the pic down to less than 2Mb... Damn note 7 camera... but it does have 4 spark plugs and 2 carbs on it....

 

[flyingscott]

More than likely an 85 hp motor.

 

[jimmbo]

also Mercury never made a 110 HP motor.

Actually they did
http://www.boatinfo.no/lib/mercury/brochures/1966mercury.html#/4

 

[flyingscott]

Actually they did
http://www.boatinfo.no/lib/mercury/brochures/1966mercury.html#/4

If you look at post #9 I did say I found it but it is still out of his serial # range.

 

[jimmbo]

If you look at post #9 I did say I found it but it is still out of his serial # range.

Yes you did:embarassed:

 

[Jeff Oosse]

Hmmmm.... I looked at the maxrules page... I do have powertrim on it but no of the 70's models do not have that option it looks like... i wonder if its a newer motor at this point...

 

[flyingscott]

They had power t/n/t in those years. You could also have one retrofitted. I do not think your motor is newer than what it is. Put up a pic of the powerhead all sides.

 

[Jeff Oosse]

I will have to figure out how to drop the resolution on these pictures... they are all 4Mb or bigger... I'll take some more tonight