turns over very slowly when hot

[Dan Filetti]

Sooo much for the guys question...nerds.     

Does that make you a dumb jock then?

[rktmanfj]

Sooo much for the guys question...nerds.     

Which was answered on page 1.

Randy T
Indy

[carsick]

If it really is like a Chevy smack the starter with a hammer while trying to crank it. Just like kids, need a good whack when they are troublesome. Beer usually removes any reservations you may have about this technique. And do remember to have it in park while your girlfriend is turning the key since you're prob'ly under the truck and you already twisted the wires together for the PRN switch and that didn't fix it either. Wait, are we still talking about FJ's? 

[racerman_27410]

I'm not convinced its all about the starter motor


just crack the throttle a small amount while cranking and she will fire right up.



KOokaloo!

[jykkeh]

BUY 13Y start (yamaha xjr), thats all

[FJ12]

With all these posts I nearly forgot what the question was, but anyway, my 86 was doing the same thing exactly, for about an annoying year or so of me looking and putting up with it until finally the other day after a few slow cranks it finally stopped turning over for good. And the culprit - that starter relay solenoid thingy that is in the photo's (I would call it a solenoid). Brought a new one, fitted it, guess what, it starts perfect every time now. Fixed, I now love my FJ even more !!

Colin

[FJmonkey]

With all these posts I nearly forgot what the question was, but anyway, my 86 was doing the same thing exactly, for about an annoying year or so of me looking and putting up with it until finally the other day after a few slow cranks it finally stopped turning over for good. And the culprit - that starter relay solenoid thingy that is in the photo's (I would call it a solenoid). Brought a new one, fitted it, guess what, it starts perfect every time now. Fixed, I now love my FJ even more !!

Colin

I am guessing that the old one worked just fine, messing with the connections cleaned up the contact and dropped the resistance. Too many times I replaced a part and the problem went away. Tested the old part to find it also worked properly. Put the old part back on and ran it for years more. The older the bike, the more likely you will find this. On the other hand....it was a bad part some of the time. For some, they take it apart to trouble shoot, don't really find anything, put it back together and suddenly it works. Don't care why, it works now, let's ride! It's all part of the experience.

[indyblue]

With all these posts I nearly forgot what the question was, but anyway, my 86 was doing the same thing exactly, for about an annoying year or so of me looking and putting up with it until finally the other day after a few slow cranks it finally stopped turning over for good. And the culprit - that starter relay solenoid thingy that is in the photo's (I would call it a solenoid). Brought a new one, fitted it, guess what, it starts perfect every time now. Fixed, I now love my FJ even more !!

Colin

I am guessing that the old one worked just fine, messing with the connections cleaned up the contact and dropped the resistance. Too many times I replaced a part and the problem went away. Tested the old part to find it also worked properly. Put the old part back on and ran it for years more. The older the bike, the more likely you will find this. On the other hand....it was a bad part some of the time. For some, they take it apart to trouble shoot, don't really find anything, put it back together and suddenly it works. Don't care why, it works now, let's ride! It's all part of the experience.

Are you sure it was really good?  Like the thread title says "when hot".  By the time you remove it and bench test it is probably cooler.  It could be a hot intermittent condition, so the part may be bad.

[FJmonkey]

Are you sure it was really good?  Like the thread title says "when hot".  By the time you remove it and bench test it is probably cooler.  It could be a hot intermittent condition, so the part may be bad.

Of course I am not sure, that's why I said "I'm guessing" and included a little later that "It was a bad part some of the time". A bad connection will reduce performance and cause it to heat up much faster. Trouble shoot the easy/free stuff first. Connections fall into that category, just saying.

The problem is solved, that part should be trouble free for many years to come. Back to Kookaloo time.

[wakdady]

is there a possibility its not the starter at all and maybe too much compression? i.e. tight valves?
my bike does this. all i gotta do is give it a little throttle and it starts right up. but i was curious, so i did a compression check and it read like this;
155 - 165 - 175 - 160.

that #3 at 175 kinda scares me. i do know the valves are on the tighter side of things. i didn't have smaller shims to swap out so it'll have to be redone first chance i get. i'll have to buy shims from Randy it seems. His prices are good.

[Pat Conlon]

is there a possibility its not the starter at all and maybe too much compression? i.e. tight valves?
my bike does this. all i gotta do is give it a little throttle and it starts right up. but i was curious, so i did a compression check and it read like this;
155 - 165 - 175 - 160.

that #3 at 175 kinda scares me. i do know the valves are on the tighter side of things. i didn't have smaller shims to swap out so it'll have to be redone first chance i get. i'll have to buy shims from Randy it seems. His prices are good.

Short answer: No.  Tight valves would result in the valve left partially open, thus your compression would be lower, not higher.

[weymouth399]

My 86 blows 170 to 175 on all four. The 155 would worry me.
I run my valves on the loose side of spec.

Bob W

[wakdady]

My 86 blows 170 to 175 on all four. The 155 would worry me.
I run my valves on the loose side of spec.

Bob W

i got this using the search

"Standard 142psi
Maximum 171psi
Minimum 128psi"

well, if tight valves produce lower compression... and my #3 valves are tight, what would happen if i got the correct shims in there? i want to bring that 175psi down towards 165 ideally, right?

[weymouth399]

My 86 blows 170 to 175 on all four. The 155 would worry me.
I run my valves on the loose side of spec.

Bob W

i got this using the search

"Standard 142psi
Maximum 171psi
Minimum 128psi"

well, if tight valves produce lower compression... and my #3 valves are tight, what would happen if i got the correct shims in there? i want to bring that 175psi down towards 165 ideally, right?

Put the next bigger shim in it then, but I couldn't imagine wanting less though.

Bob W

[wakdady]

you chure? if i'm at .15 in the exhaust, shouldn't i go with a smaller shim to loosen the valve?