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    1989 Force 35 - Model 357Y94 Serial 1012 - Tachometer Install Question

    Hello, So, my TinyTach just died and I'm thinking about installing a Teleflex or similar style in dash tach. The motor is the 1989 Force 35 - Model 357Y94 Serial 1012. Attached is a photo of the "electrical connection strip" on my motor with the corresponding sticker that describes where...
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    1989 Force 35 - Model 357Y94 Serial 1012 - Thermostat??

    Hi- I am wondering if there is actually a thermostat in this motor? 1989 Force 35 - Model 357Y94- Serial 1012 I know there is a cover somewhere...but I have read that the 35hp did not have a thermostat. Can anyone shed some light? I also need to change the plastic "water inlet screen"...
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    Deep Cycle Starter Battery?

    Hello, I have been using a "deep cycle marine" (550cold crank, 700 marine crank) battery as my starter battery for my 89 force 35. It has started my motor without issue for 2 years. It is now struggling to turn it over. I am guessing that I need a new battery. On my way to pick up a new...
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    89 Force 35 - Solenoid Part #?

    Hi, My Problem: Motor (89 force 35) ran great yesterday. Started up nicely 30 - 40 times fishing around the lake. On the last 2 starts I noticed some hesitation from the "starter". Normally I turn the ignition and the starter will spin the flywheel until the motor starts. Sounds perfect...
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    Piranha Prop on 89 force 35

    Hello- I have a 89 Force 35 with non-through exhaust. Has anyone had any luck with a Piranha prop fitting this motor? I am trying to install the hub "chmc-2" part #MC3, and I can not see how this is supposed to fit. Any help or info is hugely appreciated!
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    Is the drive shaft boot necessary?

    hello- I have a 1989 force 35 model #357F9A - this motor is in mint condition, not a scratch, super clean, always maintained, starts right up, and runs like a top... For the first time I dropped the lower unit and attempted to change the impeller. Everything seemed to go smooth. I had to tap...
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    something has gone wrong!

    hello- I have a 1989 force 35 model #357F9A - this motor is in mint condition, not a scratch, super clean, always maintained, starts right up, and runs like a top... For the first time I dropped the lower unit and attempted to change the impeller. Everything seemed to go smooth. I had to tap...
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    Any Pre-disassembly advice?

    I am about to drop the lower unit on a 89 force 35 (357F9A) to change the impeller and the seals. I have the parts catalog and diagrams to follow, but both the clymer and the seloc manuals are not very specific to this motor. Does anyone know of any disaster waiting to happen during this...
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    89 Force 35- Water in L.U. after prop hit rock...

    Hello, I have an 89 force 35 in great shape. The Lower Unit has never allowed water in, in the past, I have changed the oil several times on same gaskets, The other day I had a light impact, prop. vs. rock. The motor never stalled, and still runs great with no apparent damage. I am changing...
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    can't get right idle setting

    i have an 89 force 35 that i am trying to tune. the book says idle should be at 600-750 when i set the idle this low the motor really wants to choke and sputter, and 1/2 the time will stall when put into gear (the shifting is super smooth at this rpm, no clunk at all) - at this rpm the motor...
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    motor just a little to big.....big deal?

    I am looking at purchasing a 16' aluminum bass boat with a 75hp 4 stroke Merc. The Coast Guard warning says the boat is rated for a max 50hp motor. I'm a bit new to the boating word...how big of a deal is this? The boat is a 1989 Spectrum 1609 - in what appears to be great shape. Thanks for...
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    new gasket for lower unit fill screw?

    I have an '89 force 35 I have changed the lower unit oil a few times and have used the same crushable gaskets when replacing the oil fill screw and the vent screw. I have read that this is bad practice. Any idea where to pick up more of these gaskets. I can't find this motor listed for parts...
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    '89 Force 35 impeller change

    Hello I am getting ready to tackle the impeller on this motor...after reading the instructions for the 3 and 4 cylinder motors posted above these questions remain....I was wondering? 1. Are there any hidden bolts (other than the 4 showing) that are attaching the Lower Unit to the upper? 2...
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    Ticking sound coming from motor.

    Hello, I have an 89 force 35 on a 16' Alum Bass Boat Out fishing the other day, during a quiet moment, I noticed a soft ticking sound, like the ticking of a clock, that was coming from under the motor cover, and also at the control box. I had run the motor open for 15 minutes and had been...
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    How to care for motor between lake trips?

    Hello I have an 89 force 35 on a 16 spectrum bass boat - I use it every 3-4 weeks or so...6 - 12 gallons of fuel get burned per use. Other than an annual tune-up..... For the best reliability and longevity, What is the recommended motor care for the month in between trips. Any tips or advice is...
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    I read on a post to use a 45:1 mix for better Lubrication?

    I have a 89 force 35hp - i currently run it 50:1 as the manual states- I recently read that it may be a good idea to run a richer mix 45:1 for better lubrication in the engine. This post stated that he "tuned" the motor to run with this mix. 1.) Is this a good practice? 2.) If so, how...
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    How much gear oil is ok to loose when changing lower unit?

    Hello, I am wondering how much Lower Unit Oil is ok to loose when doing the oil change. No matter what, I tighten the upper vent hole, and then quickly pull out oil bottle nipple and replace the lower screw, I am loosing some oil. Is this to be expected? 1989 Force 35
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    Pirannah Props...flex on 35hp?

    I have a 1989 force 35 on a 16 spectrum aluminum bass boat, with a 10 3/8 x 13 1/2" michigan match aluminum prop. w/ a cone nut and cotter pin attachment. I'm revving to high at WOT. Problem is I can not find a manufacturer that makes a prop. (that is listed for that motor,) with more...
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    1989 Force 35- Help with info....Tach Help, Impeller help, Fuel filter Help

    Thanks for all of the help so far, and .... I have a few more questions... I have spent an hour in this forum looking for this info and I just can not find it. 1. What are the specifications for a tachometer that will work on this motor? 1989 Force 35 Serial # 1012 Model #357y9a 2. Also...
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    Mystery Oil / Seafoam added to 50:1 mix?

    Do you add the de-carb additive to the 50:1 mixed fuel..... or is the additive replacing the 2 stroke oil and mixed with the gasoline as per the instructions on the bottle..... thanks
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