Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
bobber down

Replacing impeller

Recommended Posts

I heard that you should replace your impeller every two years on a alpha 1 outdrive true or false

Sent from my SAMSUNG-SGH-I747 using Lake Ontario United mobile app

Share this post


Link to post
Share on other sites

I would check the service manual at a marina for sure.....I ran my Merc Optimax for 12 years and after the impeller failed found out that it is supposed to be replaced every two years in an Optimax. It was noted in the service manual but not in my owners manual. (and yes I did know I was skating on thin ice beforehand :lol: ) Basically they take a "set" (e.g. bend out of shape slightly rather than actually being destroyed per se. and no longer fit tightly to pull the water the way they are supposed to. I was surprised that the water still spurted out the ejection port....I figured that it would stop altogether but I was told that not so...but the upper cylinders may not receive the necessary flow for cooling raising the engine temp abnormally and if extreme can "smoke them". Luckily my warning alarm went on and engine only went to 190 degrees and I shut it down so no damage done. Lesson learned...I won't risk it again. I know it is an outboard but still the same principle.

Edited by Sk8man

Share this post


Link to post
Share on other sites

My 150 efi is supposed to get one every year. The original failed early in season 2. I changed it the next two seasons. Then i bought one and kept it in my truck along with the tools to change it. Got three years on that one and just replaced it last week as to not push my luck. When you change one really grease it up with mercury 24c with teflon. Makes it go on real easy.

Share this post


Link to post
Share on other sites

I change mine every spring. I average 250 - 300 hrs a year and its not that hard or expensive to do. I dock my boat and don't want to have to pull it out if there is a problem. This way its done and I don't have to worry about it.

Share this post


Link to post
Share on other sites

I pushed my luck...went 11 years without changing and never had a problem.  When I did change it, the impeller looked brand new, everything still tight, but I changed it anyways...yammy 115efi.  But better safe than sorry.  However, thought I'd comment as I am not all that mechanically inclined but  did it myself with ease...there are several great youtube videos showing you how to do it on a variety of motors.

Share this post


Link to post
Share on other sites

Your manual is based on salt water replacement and you are in fresh water. If you do a lot of shallow fishing where there is sand and mud that gets kicked up go for once a year,if you are in clear water and trailer your boat ,3 or 4 years is ok. If you sometimes turn over your engine for just a few seconds to see if it starts replace after 3 tries.

Share this post


Link to post
Share on other sites

Who cares what the manual says.  Cheap insurance policy if you ask me.  I do mine every other year.  Overheat the engine, it might cost you way more than a simple impellor replacement. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • Replacing Steel Cable On Downriggers

      I have two Big Jon Sportsman Downriggers that I need to replace the cable on this season. Last year I did it, but the cable was constantly coming unspooled when I would take the riggers off the mounts to put on the cover. This has caused a bunch of kinks. Before I replaced the cable, this wasn't an issue. Did I put on the wrong type of cable for these downriggers, or put it on incorrectly? I owned Cannons before this and this was also never a thing when replacing that cable.

      in This Old Boat

    • Replacing coated downrigger cable

      Question, I need to change out the coated downrigger cable on one of my Scotty riggers.  I have a Depth Raider system on the boat.  Does anyone have a video for proper installation?    Thanks 

      in Tackle and Techniques

    • Replacing Line Counter on Marlin Electric HP

      Replacing Line Counter on Marlin Electric HP Hey guys,    I have a Marlin Electric HP downrigger and I need to replace the line counter. I do not want to remove the spool (which means disassembling the entire downrigger) but I might have. I could be wrong though. Any ideas on how to do it? 

      in Tackle Description

    • Bad impeller?

      Bad impeller? Ran the kicker yesterday for about 4 hours with no problems (4hp Johnson 4 stroke). I know it was spitting water out the couple times I went back to adjust the speed. Then I noticed white smoke coming out the side of the engine and ran back and shut it down quick. It must have gotten very hot and actually melted the sight glass on the oil reservoir (the "sight glass" is a plastic lens), it was spitting oil and smoke out of that hole after the lens melted out. I didn't look to

      in This Old Boat

    • Impeller base shot?

      Top was melted. Bottom has a slight lip from wear. Replace or still usable?   Sent from my VS425PP using Lake Ontario United mobile app    

      in This Old Boat

×
×
  • Create New...