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    Merc 115HP ECM Part #

    Does anyone know the part number for a 2007 115HP EFI 4 stroke ECM and a good source to buy? All the parts diagrams have these two options Mercury ECM, Engine Control Module - 115 Part# 89772721T and Mercury ECM, Engine Control Module - 115 EU Part# 89772724T Which one?? :facepalm:
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    2008 75hp 4 Stroke Air Filter?

    I have a '08 Merc 4 stroke that has a air filter/silencer and the foam has deteriorated on the filter. I did a search on the net and discovered this is a problem with the new 75-115 motors and they seem to fall apart after just 25-50 hours. What's the solution. These filters cost anywhere...
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    This is a Strange One!

    OK, I removed my old bilge pump to install an automatic bilge. Confirmed that the new pump is working by jumping it to a battery, float and manual override works fine. Install the pump and put the switch to auto and the pump starts to run. Put the switch to off and it stops. Put the switch...
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    Removing Restrictor Plate on Merc 75 EFI

    I have a '08 Merc 75 EFI and noticed it uses a restrictor plate under the air filter. Is there any issue with removing it. I'm not trying to make a 75 into a 90 just noticed that it was a huge restriction and thought I would remove it for some added performance benefits. Really only want to...
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    No-Feedback Steering

    Can I just change the steering box (helm) and use the existing cable to give me no- feedback steering? How do I know which box to buy? The boats a 08 Princecraft 164 with a 75 Merc. Thanks
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    '08 Honda 40hp no spark?

    This is a new to me '08 Honda 40 4 stroke with remote. I purchased the motor just before winter to put on my pontoon boat. I purchased the motor from a marine dealer in MN which is about 200 miles from me. The motor did come with a 50/50 warranty. I installed the motor on my pontoon and...
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    Longer Tiller Handle?

    I just installed a new 2006 Merc 60hp on my G3 V170T to replace the Yamaha 40hp 2 stroke. I'm very happy with the motor but just wondering in Merc offers an optional longer tiller handle? I find myself having to reach further back then the Yamaha.
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    Video of Rough Idling Yamaha 40hp 2 Stroke

    This is a continuation of a previous post. The motor is a '04 Yamaha 40hp 2 stroke which I bought this spring. It has around 30-40 hours on it . This is the idle after I have done the following which didn't really seam to help much. I replace the spark plugs with NGK's, all the carbs were...
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    Is a 40hp Yamaha Suppose to have a Rough Idle?

    I have a 2004 40hp Yamaha that's new to me this year. I bought it earlier this year and the motor has maybe 30-40 hours on it. Ever since I've owed it the motor has a "lumpy" idle. At up to around 1500 it idles rough but after that start to smooth out and runs fine. I can troll with it at...
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    Yamaha 40hp Rattle Noise, Video

    The motor is a 2004 Yamaha 40tlrc that has about 15 hours of use. If you listen carefully you can hear a rattle noise as soon as it put into gear (forward or reverse) and as soon as you get off idle the rattle stops. It doesn't rattle in neutral. Noise seems to be coming in the area between...
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    Is This Normal? (Yamaha 40hp 2 stroke)

    I just purchase a 2004 Yamaha 40TLRC that is like new. It has about 15 hours of use on it. Today after mounting it to my boat I started it up in the yard with the ear muffs on to run some Seafoam through it and notice at idle and in gear a rattle noise which seams to come from between the...
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    Tiller Handle for an '04 Yamaha 40hp 2 Stroke

    I got a good line on a 40hp used maybe 30 hours but has console steering and I need a tiller for my fishing boat. I found a complete tiller on Ebay for a year 2000 40hp Yamaha 2 storke. Will this fit the 2004? Also does the 40 tiller use a friction lever? Would there be a friction bolt on a...
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    Is this how you measure prop shaft runout??

    http://www.youtube.com/watch?v=7vNuCMyC8Gg I measured at the very end of the shaft and that reading would be higher.
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    Slightly bend in Prop shaft?

    The 2004 50hp Merc 4 stroke that I've bought has a slight bend in the shaft after the seal. It's about .001 to .002 out (a guess, I haven't measured it yet). Is this going to be a problem? Previous owner said they never noticed any vibration. Local shop said they could straighten it for $300.
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    Merc 50hp 4 stroke on this boat??

    Ok, I have a '98 Princecraft 14.5" boat with a beam of 73" and transom measures 70.5". Picture is an example. The transom measure 20". The boat weight from the manufactures website is 520lbs. The boat has a full floor with livewell in front and Minkota trolling motor with battery mounted...
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    4 Blade to 3 Blade?

    I have a 1998 Evinrude 25hp 3 cylinder that is mounted on a 1998 Princecraft Pro 142 (14' with a beam of 73"). The boat is running a OMC 10.5 X 12 four blade prop and achieve 25 mph. I want better top end performance and considering a 3 blade 10 X 13. Will the 13 pitch result in the same...
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    1998 25hp 3 cylinder oil injection problems?? Pictures

    I just purchased a 1998 Evinrude that had it's oil injection system removed. The previous owner was told by his marine mehanic that the oil injection system would fail and to remove the tank and run mixed gas. Is this true? I got the tank from him and it would be nice to not have to mix fuel...
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    Which boat to buy? Need help, Pics

    OK the first boat is a 1999 Tracker 16' console steer with a 25 Merc 2 stroke. The boat has some dock rash but the interior is very clean and modern. It has a live well, motor has electric start power trim and tilt. The boats sold at a dealership and comes with a warranty (I have to find out...
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    2003 Merc 25hp 2 stroke, reliable?

    I have a good deal coming up on a 03 Merc 25hp 2 stroke, 94 Northwood 16' and nice trailer for $2,500. I already have a Northwood 14 so I know the boat but haven't owned a Merc (70ish 20hp) in 25 years and hated the one I had. It was hard starting and idle so bad it shock the whole boat. Are...
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    '08 20hp Tohatsu and '01 15hp Yamaha, Same?

    I have both these four stroke motors and the powerheads on both of these look identical. Are the Nissan/Tohastu motors copies of the 15hp Yamahas? The Yamahas were redesigned (I think) in 2006 so did Yamaha sell the design to Tohatsu? Can you change the 15hp Yamaha to a 20hp by swapping in...
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