Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
Luck e 1

Changing oil in four-stroke

7 posts in this topic

Got a two year old Yamaha 25 horse, 4-stroke. We want to change the oil and oil filter.

Can you use regular 5w30 or 10w30 oil, or do you have to use the Yamalube?

Share this post


Link to post
Share on other sites

i was told by a marine mechanic that a 4 stroke engine is a 4 stroke engine you do not need to use special oil just regular car oil is fine i would suggest running synthetic. i use car quest synthetic because at 4.00 a quart you can't beat the price.

Share this post


Link to post
Share on other sites

Use only marine oil, they have additives that adsorb water and others made just for a boat oil. It is true a 4 stroke is a 4 stroke but one you run on dry pavement and one on run on water. If you want to save $5 and then do $1000 worth of damage to your motor then it was worth the $5 savings.

Share this post


Link to post
Share on other sites

Be careful, marine grade oils have higher shears and tighter viscosity standards due to the constant high revving conditions of a outboard motor. How often does you car run at 5-6,000 RPMs and how often or should I say constantly does your outboard run at 5-6,000 RPMs. Not to mention you are dealing with huge amounts of moisture that marine grade have inhibitors within them to help with the corrosion and milking issues.

You can use auto grade oils that will work, but do you want to be so mean to the one thing that takes you fishing?

Share this post


Link to post
Share on other sites

Dumb question, I dont use it but does amsoil have these additives in it for water?

Share this post


Link to post
Share on other sites

Thanks guys...I will probably just use the Yamalube becuase I really only change it once a year...so the savings wouldn't be that great compared to the potential risks.

Share this post


Link to post
Share on other sites

Yes, AMSOIL does have the oil for marine 4-stroke engines.

Especially when new, you should use a "NMMA" certified oil - and the specs really are different - these engines turn up higher RPMs and do it quicker than automotive engines. Plus you need NMMA certification to meet warranty specs for the marine 4-strokes.

AMSOIL has NMMA certified marine 4-stroke oil in 10W-30 and 10W-40. E-mail me off the forum for more info.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • HunterFisher11
      Well thinking that I will give it a try thaks for all the input. Will post again if I get out.
    • CigarGuy
      Cook, MN facebook page has a picture and info on it.  I don't know how to post a link, but here's the post-minus the photo.   The combination of record mild temperatures in late February and more seasonable temperatures in early March, has prompted dramatic ice movement on Lake Vermilion.... The south shore of Birch Point, which faces Big Bay, has seen some of the most extensive damage, as the ice has twisted lift docks, damaged boat houses, downed trees, and rearranged sizeable chunks of shoreline. Only a handful of docks along the heavily-developed lakeshore have so far escaped damage from the ice. Many docks have been damaged beyond repair. The pressure of expanding ice is typically relieved out in the lake, where large pressure ridges often form. But those ridges didn’t form as usual this year, and that left the shorelines vulnerable to the immense power of expanding ice. Lake property owners are likely to be shocked when they arrive back at their cabins and lake homes later this year. And the cost of repairs could be especially painful since, in many cases, the damage is likely not covered by insurance. “It will depend on their individual policies,” said Donna Mosher, with the Tower-Soudan Agency, which serves many Lake Vermilion property owners. She said standard insurance policies typically don’t cover ice movement, which can be a frequent source of property damage in areas where thick ice builds up in winter. Many property owners on Vermilion and other larger area lakes have turned to lift-out docks to minimize their risk of damage, but this year’s unusual conditions are leaving many of those docks damaged or destroyed as well. Some property owners do obtain insurance that includes a specific schedule or rider to cover more expensive docks, according to Mosher, but that’s usually the exception rather than the rule. “I’ve had to tell people ‘no’ already,” said Mosher. “It’s unfortunate.”
    • T-water
      The good news is you can't lose!  Let us know what you decide.
    • tacklejunkie
          Downriggers are not necessary but if you use them this time of year, don't go down  deep. I used to use boards but they were more complicated for others on my boat to use so it's small dipseys off the side or a clean line straight back. Spoons and sticks work well this time of year   Shallow and high. One year, I ran DR in the spring with the counter reading 6 feet.  
    • Musky hunter 82
      No problem, I always try to help out another fisherman whenever I can.  Squarebill crankbaits 12# fluoro would be good, but if you're talking lipless crankbaits I'd run that on 17# as well.  Here's how I have my baitcasters setup:   6'6" MH - 50# braid (Swim jigs, and topwater frogs) 7' MH - 15# mono with a  18" - 17# fluoro leader (Spinnerbaits/Chatterbaits) 7' MH - 17# fluoro (Jigs, Lipless Crankbaits) 7' M - 12# fluoro (Squarebill crankbaits)   Worms, tubes, jerkbaits and topwater poppers I use a spinning rod