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  1. madman2021

    Mercury 25 hp efi no spark

    This 25 hp has less than 2 hours on it and already broken. Well anyway. I put the boat in storage for one month and go to fire it up today and no start. Fuel pump works, good fuel(non ethonal), I'm getting fuel. Spark plugs good, but I'm not getting spark off of any of the 3 spark plug wires...
  2. madman2021

    Which motor? Yamaha 90 or evinrude 90

    I have a 2008 south fork 18x60 center console flat boat. I'm looking at 2 motors for it. Looking for which one is more powerful. One is a 2009 brand new in crate Yamaha 90 3 cylinder 2 stroke with 5 year warranty. Or a 2000 Johnson 90 2 stroke 4 cylinder.
  3. madman2021

    Inline 3 or v4 for my boat

    I have a 18 foot 60 inch wide south fork flat boat center console with a 4 foot fantail. Capacity plate says max hp is 70. But that's for a heavy 4-stroke. I've added a little weight to the boat and wondering if I should go with a 2-stroke 3 cylinder or v4? I'm looking to do over 40 mph. I've...
  4. madman2021

    Charging trolling motor battery with main engine electrical help needed

    I've been working on this for a while now and need to get some help. I am trying to charge my trolling motor battery with my mercruiser 140 engine alternator. I have a solenoid rigged up to connect both the main battery and the trolling motor battery only when the key is on and engine is...
  5. madman2021

    big boat trolling motor options?

    we have a custom built 26 foot(30 foot with fan tail) flat boat with a cabin on it. we use it for both fishing and hunting. for the last 30 years it has been an issue with fishing off it due to not having a trolling motor. what options do we have for trolling motors to power this beast? who...
  6. madman2021

    Mercury warranty questions

    I'm getting an amazing deal on a lot of mercury and Briggs and Stratton outboards from a local store that were customer returns. I'm getting 2 25hp mercury efi motors, 1 9.9 mercury, and 4 Briggs and Stratton outboards. My question is can I get the mercurys fixed or replaced under warranty. They...
  7. madman2021

    Prop for 35 evinrude?

    My buddies boat is a 1979 16 foot monark aluminum bass boat. Identical to the bass trackers. It has a mid 80's evinrude 35hp on it with a 11 pitch prop. He doesn't care about low end torque. He fishes with about 1-4 people. With the current prop it tops out at 27mph. He's wanting more top speed...
  8. madman2021

    1989 funjet resto/conversion

    I've got a 10 foot 1989 funjet mini jet boat that has never been finished from the factory. All I have is the top and bottom of the hull and hin number. I want to build the boat but had a few questions before I get started. The top and bottom hulls were never mated together. How do I connect...
  9. madman2021

    Cheapest new ski boat?

    What's the cheapest new ski boat. 16-18 feet I/O 4 cylinder?
  10. madman2021

    Are Good Year Marathons still bad tires?

    Well im finally retiring my original 1986 bias ply trailer tires. theyve lasted quite a while but I just bought a set of new Goodyear Marathons for my boat trailer. i read some old posts from 2008 that the marathons are junk. i hope i didnt make a big mistake here. i paid $282 for 2 with 3 year...
  11. madman2021

    high performance cam for 140/3.0???

    ive found on ebay about 3 or 4 different cams made by isky for the chevy 151 or 181. was wondering if these would be any good for better performance/gas milage/and rough idle with thru hull exhaust? has anyone used them before? good or no good? thoughts or opinions? thanks
  12. madman2021

    biggest alternator for 3.0/140?

    i need to know whats the biggest alternator that will fit on my 1986 mercruiser 140 with v-belt setup? i run alot of electronics and 4 batteries. thanks
  13. madman2021

    minn kota 42 auto pilot intermitten problems and power loss

    ive got one of those old black and white colored minn kota auto pilot powerdrive 42 lb thrust trolling motors. like an idiot i bought mine used off of ebay in so called perfect working order just got out the shop. yea... BULLSH1T. well didnt get a refund so im stuck with it. anyway... the motor...
  14. madman2021

    Best oil for mercruiser 140?

    I'm currently running penzoil I think. I'm wanting to run amsoil full synthetic. What's yalls opinion??
  15. madman2021

    Which hifive prop pitch for my boat?

    I've got a 1986 glasstream 17 foot with a mercruiser 140. Currently running a 19P alum 3 blade for pulling and heavey loads, but a 21P SS 3 blade for bass fishing. I was told with a hifive prop I can get the best of both worlds, low end and top speed. My ? Is which pitch of a hifive prop to...
  16. madman2021

    original factory interior design of 86 GS cutlass 172?

    looking to see what the original factory layout of a 1986 glasstream 172 cutlass looks like post pics if some has one
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