Mistery: what model and Hp is this motor?

[OldMercsRule]

Hi folks, I am getting ready to travel a few miles this Sunday to investigate an old "tower of power" I am thinking of purchasing and I need some help. The seller has a "100 hp short shaft" It has a red stripe on the cowling and the late sixties look with respect to the block. He gave me a serial # from the motor bracket of 2211156 which looks to me to be either a 1100 or a 950 not a 1000. As long as the motor is sound I plan to buy it as any of those three motors would be acceptable. That said, how do I tell what it is? It sounds like the type II Thunderbolt ignition, (trigger actuated: not points), which I preferr, as I had trouble with the point triggerd ignition years back and have a bad attitude about those.
As long as it is a 1967 110 or 95 hp I would be good with either. How do I tell which one this is, and where would there be a confirming serial # on this motor, (if there is one)? How much of a problem will it be to maintain if I can't tell which one this thing is? Thanks for your help.

 

[Laddies]

Re: Mistery: what model and Hp is this motor?

66 was 1869776 and 67 was 2097280 for the 950 and 66 was 1870204 and 67 was 2097385 for the 1100, the 1000 that started in 68 was 2318586 and 69 started 2484633

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

I thought the 1967 950 had a serial number range that would include this number.

 

[Laddies]

Re: Mistery: what model and Hp is this motor?

James, I need typing lessions the start number for 67, 950s should have been 2097280 I will correct that sorry Bob

 

[AMD Rules]

Re: Mistery: what model and Hp is this motor?

One way to determine which hp it is would be to inspect the carbs closely. Typically, you will note differences in the jet sizes and venturi type. Scouring parts lists may narrow it down. Other way may be to identify casting numbers on the blocks, although they may be similar across power models.

Assume it is a silver block?

The serial number alone may not help, as there is often overlap in serial number ranges for the same year with various horsepowers.

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Hi Guys, Yes the block is silver, and the decals are all 100 HP from that era. He claims it is a fresh water engine that runs great. I understand that the 950 had KC6A carbs and the 1000 and the 1100 both had KC7A carbs. I hope I can tell the difference between the two. I have a pristene 1969 1000 short shaft on another boat that I plan to carefully examine prior to making the trip to check out this motor. The owner claims the switch box has the three wires on the distributer side, (which means it is not the point triggered ignition that the 1966 models had). The SELOC manual claims there is a serial number stamped on the top of the block, (which I will search for to confirm the number on the transom bracket). Does anyone know how to tell which carbs are which? Thanks again. JR

 

[Scaaty]

Re: Mistery: what model and Hp is this motor?

Either a 950
http://www.oldmercs.com/1967merc950.htm

or 1100
http://www.oldmercs.com/1967merc1100.htm

But who cares. GREAT motor, especially a SS!

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Hey Scaaty, I agree that either a sound 950SS or a 1100SS or even a 1000SS would be great. My son blew up my 1968 1250 (Short Shaft) that I had owned and run long and hard from 1986 to 2004, (only the lord knows how many wonderfull care free hours that reliable engine actually ran pulling my three kids and their friends on their toys;[but: many many]). One of the Merc people I had crossed paths with years ago warned me that the 1250 was a "grenade" if over reved, (5200 red line) and I think that is what my son did to end that engine's carreer. I decided not to increase the transom height on one of my boats to accept my 1981 115 with a 20" shaft, so I have been looking for a short shaft six with the non point triggered type II Thunderbolt ignition. I was hoping someone could send a picture of the two different carbs, (or the 950 KC6A since I have a 1000 and know what the KC7A looks like). JR

 

[Scaaty]

Re: Mistery: what model and Hp is this motor?

Try going here and ask...

http://www.pfs-ware.com/kwast/mercboard/index.htm

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Hey SCAATY, Thanks but that site won't alow me to enter. I tried typing in the address directly and it still blocked my access. JR

 

[Scaaty]

Re: Mistery: what model and Hp is this motor?

Hey SCAATY, Thanks but that site won't alow me to enter. I tried typing in the address directly and it still blocked my access. JR

I had no problem...try it again. Make sure you have a good full email addy in it. Click here, but whan you get to the site, hit your browser refresh button, and try it.

http://www.pfs-ware.com/kwast/mercboard/index.htm

 

[AMD Rules]

Re: Mistery: what model and Hp is this motor?

Another good place to look for older Merc Inline info is this discussion forum:

<a href="news://news.bigweek.org/bigweek.mercury-inlines">news://news.bigweek.org/bigweek.mercury-inlines</a>

 

[Plainsman]

Re: Mistery: what model and Hp is this motor?

Another good place to look for older Merc Inline info is this discussion forum:

<a href="news://news.bigweek.org/bigweek.mercury-inlines">news://news.bigweek.org/bigweek.mercury-inlines</a>

Thanks AMD, neat newsgroup

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Thanks SCAATY, and AMD, I was able to get into both of these sites by getting a little creative. I had to Google my way into the "bigweek" site recomended by AMD, which educated me about the "Tiger" casting name on the Starboard side of the 1000, and the 1100, (possibly the 950 too, [but that was a little unclear]). I loved the history lession posted by Clams and others, very cool site! I think my AOL account was stopping me from getting into Old John's so I tried my Internet Explorer Browser, and I got in first try. Another great site full of things to investigate! Thanks! I was never able to find drawings or pics of the 950 carbs, but I am going to buy the motor if it runs good, if the lower unit looks OK, and the compression is decent. I can put it next to my 1969 1000 to see if the carbs look different once I buy it. The 1250 my son killed was way too much power for the boat I am looking to repower, so a 90 ci or 93 ci should work great if it runs good. Thanks again JR

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Thanks for the help. Bought the motor, (it had the 1000 markings, and the desired pointless ignition), had even compression on all 6, started and ran fine in the yard, lower unit seemed fine, and shifted into reverse no problem. It looked like a forty year old engine, (my other towers look like new), and I need to take the wiring harness from the blown 1250 and replace the rough one on the 1000, (950 or 1100), other then a little black paint, carb filters, 2 fuel lines from the 1250, fuel pump kits, and a fresh water pump impeller she should be good to go next spring. Still don't know exactly what it is, (could not find a serial number on the block) so the mistery still exists. JR

 

[Scaaty]

Re: Mistery: what model and Hp is this motor?

Seems sometimes the mystery motors turn out the best, like a left at the pound old dog. Good luck!

 

[OldMercsRule]

Re: Mistery: what model and Hp is this motor?

Thanks AMD and SCAATY! The guys on the "news big week" site showed me where to find the serial #, (which was on the flange that the starter bolts up to). I am the proud owner of a 1969 Merc 1000 short shaft # 2575523! That site is a great read! If the wire tag is still through the stud holding the crank case and block together, does that mean she's a virgin, or do some shops/dealers put those back on after they crack the case? Thanks again JR

 

[Scaaty]

Re: Mistery: what model and Hp is this motor?

Thanks AMD and SCAATY! The guys on the "news big week" site showed me where to find the serial #, (which was on the flange that the starter bolts up to). I am the proud owner of a 1969 Merc 1000 short shaft # 2575523! That site is a great read! If the wire tag is still through the stud holding the crank case and block together, does that mean she's a virgin, or do some shops/dealers put those back on after they crack the case? Thanks again JR

I know one of those people there personally, and he's a real Merc freak. You should see his shop...engulfed in old Mercs!