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    Johnson 25 Prop size

    When throttle is fully forward, the throttle linkage does max out but the throttle plate I can manually open a miniscule amount more by hand. I plan to do a full carb rebuild and clean with adjustment. As far as engine height, I have 2 sets of holes for adjustment. Other pictures of my boat...
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    Johnson 25 Prop size

    Have new water pump kit, carb gasket kit, and oem prop on the way. 135 top and 130 bottom for compression. Both cylinders confirmed good spark and firing. Only thing I noticed is boat will run on just bottom cylinder but not top cylinder. But both cylinders do fire when both wires are hooked up...
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    Johnson 25 Prop size

    That is about what I expected 20-25. I get about 15-17 tops at the moment with only me on the boat. Supposed to clear up this weekend I will run a compression test on both cylinders and check spark. Also plan to clean out the jets on the carb. Once that is done I will lift the motor up onto the...
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    Johnson 25 Prop size

    I have a tach on the way. The current trim gives me the highest speed and best ride. I’ve tried every position. I will remove the tail and test next time I go out. I believe it was the previous owners attempt at trying to get it to plane out rather than find the source issue.
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    Johnson 25 Prop size

    I will do a compression test and check spark when I take it back out after it stops raining. I was only thinking prop issue because it runs great and revs up fine outside of the water. Bought from a local dealer and obviously they said they went through the motor and everything tested great.
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    Johnson 25 Prop size

    Good day everyone, I am currently troubleshooting low top speed and unable to get on plane with my Lowe Angler 140S 14’ side console aluminum boat. Has a Johnson 25hp long shaft engine which is the factory set up from the dealer. Currently has an aftermarket 10.3x12 3 blade unbranded prop on it...
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