Yamaha 4 hp 4 stroke

ImageThis forum is for general discussion of all things Boating. If it's boating related and doesn't fit in another forum, post it here!
Post Reply
User avatar
Peter
Scurvy Dog
Scurvy Dog
Posts: 49
Joined: March 10th, 2018, 11:56 am
Vessel Info: Carver 38ss 2007
Location: Portsmouth England
Has thanked: 23 times
Been thanked: 7 times

Yamaha 4 hp 4 stroke

Post by Peter »

Hi all
Ive been having starting problems with my tender outboard .
Changed plug etc etc all made no difference then checked oil it was low so filled up & bingo it starts :banghead:
Great but nowhere can i find in the msnual etc anything about a oil safety switch so before i take the tender back out & break down again was the low oil just a coicidence & i still have a problem or ?......
User avatar
pepmyster
Admiral
Admiral
Posts: 1035
Joined: June 5th, 2018, 7:17 am
Vessel Info: 2004 Carver 360 Sport Sedan
8.1 Volvo Penta
Fresh water boating
Location: Ottawa
Has thanked: 492 times
Been thanked: 211 times

Re: Yamaha 4 hp 4 stroke

Post by pepmyster »

It's there as a safety. Is this new to you? Have you ever changed the oil in it? Has you ever leaned it the wrong way on the ground and you lost it's oil. Either way, Yamahas are not known to burn oil. Just low or it's past it's time for an oil change.
User avatar
km1125
Admiral
Admiral
Posts: 3658
Joined: February 28th, 2017, 6:04 pm
Has thanked: 81 times
Been thanked: 1114 times

Re: Yamaha 4 hp 4 stroke

Post by km1125 »

Not sure on the Yamaha, but on most other small outboard you can have a problem with overfilling the oil too. The oil gets foamy and causes the oil pressure switch to sense a loss of pressure, resulting in intermittent spark.
User avatar
Peter
Scurvy Dog
Scurvy Dog
Posts: 49
Joined: March 10th, 2018, 11:56 am
Vessel Info: Carver 38ss 2007
Location: Portsmouth England
Has thanked: 23 times
Been thanked: 7 times

Re: Yamaha 4 hp 4 stroke

Post by Peter »

Yes its new to me
Yes it was leant on its wrong side
Yes it was low on oil :banghead:
Seems to be ok now & by reading your replies i prwsume it does have an oil switch its just the manual doesnt show one ?
Post Reply