Upgrade my 15hp 2 strokes mercury

[endorphin]

A newbie looking for advice to upgrade outboard for my 14.5' v-shape aluminium boat.
My 15hp 2 stroke Mercury, not sure what year - maybe 90s . Does not always start on a first pull, noisy and can't be used for trolling.

I 'm thinking 20-25hp 4 stroke newer used model. Does it make sense to upgrade to a 4 strock? Or even something like ProKicker - to make sure it can be used for trolling without damaging motor.

Also, not sure what would be a a fier price for my old 15hp 2 strok from the 90s

Thank you boaters!

 

[Pineapple Express]

Strokes not strocks!

The ProKicker and regular 4-stroke are the same in terms of running the engine slow for trolling. I wouldn't put a ProKicker or High Thrust motor on a smaller tinner since you will really handicap yourself for zipping to/from the fishing spots due to the different lower unit design (larger, bigger gear reduction) and low-pitch prop. A regular 4-stroke will do fine.

The motor in your picture is a Yamaha 9.9/15. These were rebranded as Mariners in the early 1980s and painted silver/grey (different than the Yamaha blueish-grey). They were never sold under the Mercury name. Tough to say what a fair price is....it looks like it's well used. If you can show it running well maybe $800. If it needs work to run properly it'll basically be sold for parts.

 

[Barman]

Just be aware of the weight difference from replacing a two stroke with a four stroke, especially if you go with a larger engine.

There doesn't appear to be a lot of freeboard as that boat sits now, but it is hard to tell from your picture.

 

[Pineapple Express]

Just be aware of the weight difference from replacing a two stroke with a four stroke, especially if you go with a larger engine.

There doesn't appear to be a lot of freeboard as that boat sits now, but it is hard to tell from your picture.

Yes. FYI I have one of these Yamaha 9.9s. Mine is a 1984 and still runs great. The weight is around 85lbs. As mentioned by @Barman be mindful of the weight difference when installing a heavier 4-stroke. You may have to shift your fuel tank or other items forward to offset the heavier motor.