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  1. scout-j-m

    1992 Plastic Topped 15hp Carb vs 1982 All Metal Carb

    Aside from the design, is the performance of the later model 9.9/15 hp OMC carburetor identical to the earlier models which are all metal? I have a 1992 9.9 Johnson which has a 15hp carb of the same year on it....when I got the motor it ran great but never idled well. Found out it had 1993 or...
  2. scout-j-m

    1992 9.9/15 HP Jumping Out of Gear

    I have a 1992 Johnson 9.9 HP with a 15 HP carb. It is relatively new to me but it is in great shape, gas good compression, and runs well. I have it currently mounted on a 1648 Alumacraft flatbottom with a 10" pitch prop which is a good load especially with an extra guy. I have put maybe around...
  3. scout-j-m

    Mini Jack Plates

    I have a 1648 Alumacraft with a 15" transom and as all of my OMC short shaft outboards sit on there, the anti-ventilation plate sits about 1 1/2" below the bottom of the hull. The boat is rated for a 35hp outboard. Can anyone tell me who all makes a manual "mini" jack plate aside from Bob's...
  4. scout-j-m

    OMC/BRP Made Al. Prop vs Al. Aftermarkets for 9.9/15HP Motor

    I recently purchased a 1992 Johnson 15hp. It came with an OMC 8" aluminum prop. Maybe saying it is a BRP prop is a better description as it is identical to the current style of Johnson/Evinrude props they sell here on iboats and I have no clue if thats what the OEM ones looked like back in 1992...
  5. scout-j-m

    1992 9.9/15 hp Idle Adjustment

    I recently picked up a nice little 1992 Johnson 9.9 hp with a 15 hp carb. I have a couple of the same motors from the early 80's with the gear/teeth throttle control and the side idle adjustment screw but this one has the cable system (which is one specific reason I got this one). I received my...
  6. scout-j-m

    1992 15 HP WOT Operating Range

    I have a new to me 1992 Johnson 9.9 hp with a 15 hp carburetor. It came with a 8" pitch 3 blade aluminum prop in good condition. I have only had it out on the water once on my 1648 Alumacraft flatbottom and it peaked pleasantly at 19 mph at 6800 rpms with two people and light gear. I was...
  7. scout-j-m

    9.9 hp Slow Speed Needle VERY HARD to Turn

    Just bought a nice 1992 9.9 hp last night. I checked compression (110 psi) when I bought it and we ran it on muffs. When I got home I put it on my stand and tested it in a tank. It runs great but I would like it to idle down a little lower. I tried to adjust the slow speed needle but the knob...
  8. scout-j-m

    Model 25802C Shaft Length?

    There is a 1978 25hp for sale online I may be interested in, model number 25802C. It appears to be a short shaft but I don't understand where that would be indicated in the model number. Can anyone tell me for sure?
  9. scout-j-m

    1967 9.5hp Sportwin Exhaust Leak

    I definitely have an exhaust leak as the motor does 15 mph at 4800 rpms in my large 1648 flatbottom with the cover off and runs excellent aside from idling as low and smooth as it should. With the cover on it, the rpms drop down 1000 rpms or so and the speed goes down a couple mph too. With the...
  10. scout-j-m

    15 HP with no power and low rpms

    I have a relatively new to me 1982 Evinrude 15HP, model E15RCNC. I bought it based off having good compression and that the seller ran it in a barrel at low speed on top of a good price. Since I have bought it, I have checked the impeller and LU oil and both are in good shape and the motor is...
  11. scout-j-m

    9.9HP Seized Driveshaft

    The driveshaft on my 1982 9.9 hp Evinrude is sized in the crankshaft splines. I was able to remove the LU by pulling the driveshaft out of it and through the water pump housing. I have it upside down right now soaking with PB Blaster which is all I had on hand. What would the best penetrating...
  12. scout-j-m

    1982 Evinrude 9.9/15 hp service manual

    I'm having trouble finding a a factory service manual specifically for my 1982 9.9 hp and 15 hp Evinrudes. I did find a 1980 Johnson 9.9/15 hp one online though. Any specific reason this service manual will not work for my outboards? I don't know if this one will cover the tuned exahsut or reed...
  13. scout-j-m

    1982 15 hp Worn Out Upper Shock Mounts

    I recently bought a 1982 Evinrude 15hp. It runs fairly decent, has 110 psi on both cylinders, and has a solid lower unit, but definitely needs some TLC otherwise. I think it may be getting some water in the cylinders too after running a while... but since I have a backup 9.5 hp, I would like to...
  14. scout-j-m

    9.9/15 hp Shaft Conversion

    Yesterday I bought a pair of running 1982 Evinrude outboards. One is a 9.9 hp long shaft and the other is a 15 hp short shaft. I'd like to swap parts and reverse the two shaft lengths. I already have a couple small short shaft Evinrudes and am in the process of ordering an Alumacraft 1648 flat...
  15. scout-j-m

    Lark II 40HP Identification Help

    Can anyone tell me the year range the Evinrude Lark II 40hp's were produced and confirm that the motor in the pictures is actually that model? Also, what would the parts compatibility be between a 1959 35hp Lark? I ask because my dad has a 59 35hp which used to run great, however, it has sat...
  16. scout-j-m

    New to me 1967 Evinrude 9.5hp Sportwin

    I just bought a 1967 Evinrude 9.5 hp Sportwin (model 9722M). The compression was between 65-70 psi on both cylinders using the recoil starter. From everything I have read, that is acceptable and would likely go up if I used a rope on the flywheel and re-tested it...plus maybe more after a...
  17. scout-j-m

    1959 35hp Compression Release

    I am waiting on a repair manual for this motor to come in before diving into any diagnostics/repairs but wanted to ask something regarding the compression release system. When looking over the powerhead, I noticed the head to have what seemed to be an oily residue on it. This motor is missing...
  18. scout-j-m

    New 9.8 Tohatsu Prices Paid?

    I was wondering if anyone would be willing to post what they paid for their new 9.8HP Tohatsu? Doesn't have to be a 2015 or 16 model, just one from not too long ago. My local dealer has their new 9.8hp short shafts with electric start listed at I believe $1980 + tax. I still need to confirm the...
  19. scout-j-m

    Mercury 9.8 hp - What Year Model?

    Found a 9.8 hp Mercury for sale locally. Seller is going to get me the serial number but in the meantime I thought I would ask here. Anyone care to chime in on the year or likely year? Here are the pics from ad. The ad says it needs a power pack and pull cord. As pretty much all...
  20. scout-j-m

    1959 35hp Power at the Prop?

    What might the horsepower rating at the prop be for a 1959 35 hp Evinrude? My understanding is that at that time it was rated at the crankshaft. I am asking because I was wondering if modern day boats with say a 25 or 30 hp rating could handle that outboard. I think weight-wise that 35hp (130...
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