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    15hp 4 stroke lower unit changing

    Just to clarify, that housing spacer is just that. A spacer. It would need to be removed to shorten the outboard. Inside that are 3 parts that require the shorter version. The driveshaft, water tube, and shift link. These would need to be replaced/modified to complete the job. There are no...
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    Popping and shaking

    What you are seeing is referred to as a lean sneeze. It could be the carbs out of adjustment, partially blocked with dirt and varnish, or lack of fuel delivered to them.
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    Honda BF25A leaking oil when hot.

    Update time. Powerhead came off without a hitch. Nothing looked amiss with the gasket (metal gasket btw), or the mating surfaces. While hanging I fished around the water passages and found no blockages. Air blows through the block freely as well. The oil pan had a very slight bow in it from...
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    15hp 4 stroke lower unit changing

    Woa, I thought I for sure read that you said tohatsu somewhere, lol. My mind playing tricks on me I guess. The same advise applies. You can see the differences if you bring up a outboard parts website. I'd post a link, but I'm not sure on the rules of doing such a thing because iboats sells...
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    15hp 4 stroke lower unit changing

    Do you know the year of it? Tohatsu had a couple different ways of doing the shift linkage. You can likely cut off 5" from the bottom rod and rethread remainder. However a used bottom end should have the shift rod with it though since it is pinned into the gearcase. The water tube can just...
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    15hp 4 stroke lower unit changing

    The biggest issue is the driveshaft length. The water pump tube, and gearshift linkage can be shortened without too much effort, but you really need to buy the correct driveshaft. I have a friend who cut his driveshaft down to length and resplined it, but he also works at a machine shop. If...
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    Honda BF25A leaking oil when hot.

    Well... you were right. I actually found em before I read your message. These 2 little devils were causing all my grief! Revisiting the manual, it does indeed say 10 bolts. I should have looked a little harder before getting mallet happy. The result is 2 bent bolts. I cannot believe I...
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    Honda BF25A leaking oil when hot.

    Well, I have the gaskets on order so I started to take this thing apart. I got the extension case off to expose the oil pan. I removed the exhaust pipe and water tube and all 8 bolts holding on the pan. It was fairly corroded in place but some whacks with a rubber mallet and it popped...
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    Honda BF25 identification

    Something else interesting. I called Honda Powersports to order parts for it, gave the 2 vins, and they told me the outboard was sold and registered for warrenty Jun. 2002. That still doesn't nail down the year of manufacture, but it was unlikely to be sitting unsold for 4 years. I'll go with...
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    Honda BF25A leaking oil when hot.

    The replacement was a OEM Honda kit. The outboard was run for an extended time on muffs while troubleshooting the oil leak/overheating issue. I just read that these are not very good at running on muffs because of the 3rd water intake (that I just learned about) by the trim fin. I am willing...
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    Honda BF25A leaking oil when hot.

    When running under load for awhile, then shutting down, and tilting the motor up, oil was seen leaking from the lower cowl weep holes. Looking inside the hood, there is no obvious source of the oil, so I'm thinking powerhead base gasket. See pictures. I didn't think the motor was getting hot...
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    Honda BF25 identification

    Right on, I really appreciate it. I am having some trouble with this motor leaking oil, I'll start another thread to ask about it.
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    Honda BF25 identification

    Thanks. Can you tell me how you came up with 98? I'm actually not convinced. Heres a bit more info. On the lower tray there is a EPA sticker that shows it conforms to 2002 US EPA regulations. On the hood itself there is a factory looking sticker that shows 2006. I know the hood is easily...
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    Honda BF25 identification

    It appears the model number plate/sticker is missing from the R/H transom mount, so I am unsure of the year or exact model number of this outboard. It is a Canadian model 4stroke Honda 25 with the following serial numbers: BAJS-3221134 on a small plate riveted to the center of the transom...
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    Pretty overpropped.

    Who knew there is a time limit for edits... Anyway, I found a picture of the boat before it was painted. It is a Fisher sv-18cc, rated for a 115hp originally from what I can google.
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    Pretty overpropped.

    Ok, its been awhile, but I just had it out again. 25mph is the best she'll muster. With the throttle lever full forward, I disconnected the cable at the motor, and found that there was no more travel for the throttle linkage, so it is indeed maxed out, so I can rule out rigging as a limiting...
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    Pretty overpropped.

    Thanks for that! Top speed was never my goal here, just to get to where the boat/motor combo is happiest. Ill be taking it out later this week, and I'll get my gps speed as well.
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    Pretty overpropped.

    All my experience is with 2-strokes. I have rebuilt several outboards in the past, both Johnson and Mercury. However, this one was more than I wanted to tackle. Rings let go on 2 cylinders, and every other bolt was seized to the point of breaking them off. The trim motor was on its last...
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    Pretty overpropped.

    Thank you. Yea, I guess that statement should be clarified by stating the old OB was a worn out, and terrible running 1980's Johnson 88hp 2-stroke. So of course a good running 4-stroke would put it to shame. I guess what I should check is that the motor is indeed getting to WOT. I know on a...
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    Pretty overpropped.

    I recently repowered a 18ft center console aluminum boat (brand and any model numbers have been painted over). Installed now is a used, but in great shape 2004 Johnson (Suzuki) 70hp 4stroke. It came with a 13x19 3 bladed prop. First run, the motor runs amazing. Using a BRP engine check tach...
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