Cruisers Forum

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-02-2024, 11:27   #1
Registered User

Join Date: Jun 2009
Boat: Tartan 37
Posts: 17
Yamaha 8hp 2-stroke fuel pump diaphragm failures

We tend to use our dinghy only every few months. Almost every time we have bogging-down issues at high throttle that leave us limping back to the dock while constantly playing the choke. Taking apart the fuel pump we always find distorted diaphragms like the attached photo. Installing new diaphragms fixes her right up and she'll run for a few days with no problem.

Are the diaphragms failing because we're in California with high ethanol gasonline? Or because the outboard is stored on the stern rail and in the sun every day despite our infrequent use? Is there some other TLC we don't know about that we should be doing?

Thanks in advance.
Attached Thumbnails
Click image for larger version

Name:	PXL_20231210_222006711.jpg
Views:	21
Size:	416.6 KB
ID:	286964  
maddmike is offline   Reply With Quote

agm, diaphragm, fuel, fuel pump, pump

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yamaha 6/8hp vs Tohatsu 9.8hp mikedefieslife Auxiliary Equipment & Dinghy 12 23-04-2020 01:03
For Sale: Fisher Panda 4000i & Yamaha 8hp 2-stroke s4sail Classifieds Archive 10 03-04-2014 14:50
For Sale: Yamaha 8hp 2-Stroke 15" (Short) Shaft konakoma Classifieds Archive 6 14-10-2011 11:03
For Sale: Yamaha 8hp Two-Stroke Outboard - Still Under Warranty Critical Classifieds Archive 3 28-09-2010 13:58
For Sale: Yamaha 8hp, 2-Stroke - $550 - Stuart FL John Drake Classifieds Archive 1 25-07-2009 18:35

Advertise Here

All times are GMT -7. The time now is 02:11.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.