1969 Mercury Kiekhaefer 4HP lower unit compatability

[Quad82]

Hello
I have a 1969 red stripe 4 horse ( S# 2598184) with a trashed lower unit. Hit a rock. I have located a late 60s early 70s 7.5HP Kiekhaefer doner lower unit. From pictures and measurements, they seen to be the same. Can any one give me a year and or horsepower conversion chart? I have searched all I could find on 69 lower unit. But have not found the answer I was after. I do see water impellers for this motor listed as 4, 5 and 6 HP. Or if some one has a used lower unit for this 4 horse, I would be interested. Thanks, Darrell

 

[Quad82]

Re: 1969 Mercury Kiekhaefer 4HP lower unit compatability

Any help would be helpful. Thanks

 

[purz]

Re: 1969 Mercury Kiekhaefer 4HP lower unit compatability

I think I have the same motor (serial 3028880) and cannot find hardly any info on them. Sorry I cant help on your question but instead have a question of my own. I am trying to find the correct size of the female fuel line adapter to use with this motor. Have you tried this web site http://www.nicksoutboardmarine.com ? I just found it tonight but they are closed so I wasn't able to get a hold of anyone. You might see if they can help you.

 

[mmf]

Re: 1969 Mercury Kiekhaefer 4HP lower unit compatability

look up your lower unit housing and driveshaft on boats.net or usboatsupply.com and write down the mercury part numbers for the 4 hp motor then do a similar lookup on a 7.5 hp and see if the part number correspond with each other, I believe the 7.5 will work

 

[mmf]

Re: 1969 Mercury Kiekhaefer 4HP lower unit compatability

Here is the diagram of your 4 hp lower unit,http://http://www.boats.net/parts/search/Merc2/Mercury/40%20%281%20CYL.%29/2498136%20THRU%203296136/GEAR%20HOUSING%20%28DRIVE%20SHAFT%29%20%28PAGE%201%29/parts.html http://www.boats.net/parts/search/M...EAR HOUSING (DRIVE SHAFT) (PAGE 1)/parts.html
and here, http://http://www.boats.net/parts/search/Merc2/Mercury/75/2529895%20THRU%203274632/GEAR%20HOUSING%20ASSEMBLY%2C%20COMPLETE%20%28PAGE%201%29/parts.html is the diagram for a 1969 model 7.5 hp lower unit, now go compare part numbers