Recent content by adam98

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    Changed lower unit now overheating

    I have an 89 xr4 150hp 2.4l that runs perfect after lots of parts and trouble shooting. After a year my 1.78 3.75" lower unit stared kicking out of gear and after taking apart needs new forward and reverse gear for $1800for parts. So I got a 1.87 4" lower unit, fits, shifts and works great on...
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    Check valve question

    V6 150hp oil injection Is the check valve on the oil injection supply line and where fuel mixes from injection pump the same? Looks like same part and part # but diff nipples. Are they both 2psi? When blowing on them, the oil tank input check valve feels like a good 2 psi and solid seal but my...
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    89 xr4 150 high idle @ 0* timing

    Ill keep this short. 89 xr4 150 new stator, switch box's, plugs, fuel filter, 120psi all cyl. New fuel lines and bulb. Rebuilt carbs twice no change. No air leak I can find. Rebuilt fuel pump, flows good. No idle stabilizer. Runs great above 2k rpm When I do sync and set timing at 0* cranking...
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    1988 xr4 150 issues

    This is my first merc. Blackmax as I have only had small omc v4's and thought I would run with the big boys but there's a learning curve... Your input is appreciated. I have a 1988 champion bass 18' with an merc xr4 150. It starts right up, drop in to gear and idles. Any more throttle and it...
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    12v + 6v on 12v trolling system

    This worked for me, I don't mind taking a logical "risk" but easy way to get more out of your trolling motor with out buying a new one. I'm sure some brands are more over built then others... And can handle higher loads just make sure to wire it in series not parallel. Otherwise you will have...
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    75 115 v4 random working spark cyl 1

    1975 115 v4 cyl 1 sparks good now and again. at wot will some times only go to 4500 and slugish and other times flat out rips and screams past 5500+rpm. so i unpluged spark plug caps and ran one at a time to find cyl 1 spark plug looked like the odd one, and if i left cyl 1 spark plug cap off...
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    how much piston slop is ok? and how many hours should pistons last?

    I have a 1975 115 v4. hour meter is discontected and reads 800hours. 100% untouched factory motor. besides carbs rebuilt. all 4 cly read 120psi , but when plugs are out you can use a screw driver to move the pistons. seems to have a goog bit of slop. should i worry about what seams to be 1/16...
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    How to test my speedo

    i have a speedo that hasent been hooked up ut has been in the boat since 1975... it has not been used for at least 8 years and when i apply compressed air to it the needle moves.... but how many psi should be a given speed. 25psi only got it to 40 ish if i remember correctly. but is there a...
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    performance form?

    first off this is me just thinking out loud and do apreciate any input even if its not what i want to hear. I value all opinions! so dont take this wrong but... Why when i see or ask about changing something to gain performance most say dont do it you are crazy (cost to much) and everyone is...
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    1975 v4 115 powered bass boat....is this all im going to get out of it

    Ok 17' deck bass boat with a 115 hp v4 all cyl are 125psi runs fine. has cmc 6" jack plate hyd. tilt unit with 13x17 stainless prop. anti cav plate sits 1" above bottom of boat.. On a good day with min. fishing cargo by myself trim down 4000rpm trim it up to 5500 rpm 39-40mph via gps hole shot...
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    will bubble back exhaust fit on 76 115 v4

    will the bubble back exhaust fit my 1976 115hp v4 and should that increase the performance much?
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    1976 115hp w/o water pee stream?

    I had a frankinstein 1974 1969 115hp v4 and my new to me all stock 1976 115hp v4 does not have a water pee hose and the cover base does not have a hole in it for a factory hose to be there like my last omc.. i have had it in the water and no water peeing out the motor from anywhere i have...
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    Have two same boats but different ride quality

    I had two 1978 17.5 ranger bass boats... Same hual same motor one might be 200lb + if that, and that one does not really plane out and skim the water. It goes 40mph but even trimming it out and just sits in the water more. The lighter one with 4 people on board really planes out drramaticly at...
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    Is a late 80's suzuki 115hp outboard worth buying?

    I looking at a small bass boat with a 87 115hp suzuki powering it. has not been used for 8 years and said to be in great condition sitting in side storage... are these motors any good or problematic and or any thing i should know about? thanks for your input
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    about to dump my 115hp v-4 not running well

    1969 v4 johnson on bass boat ok motor pops miss's and somethimes runs wot great but mid range sputters and other times mid low range good and wot hardly runs at all. always idles fine. carbs are clean, cant find air leak in case, changed plugs and cleaned fuel pump, no clog or kink in fuel line...
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