some one help me time my 470 please

[richmatt]

Re: some one help me time my 470 please

Sounds like you may have a restriction in the fuel line, a partially blocked fuel filter maybe. Seems like you have a lot on unconnected problems with the engine did it run OK before you took it to the mechanic - you started the thread seeking advice on how to use a timing light seems to me thats the least of your problems

 

[kdmiller8251]

Re: some one help me time my 470 please

bolo789:<br /><br />Ok man I am going to throw a wild idea out..<br />Take it back to the SOB and let him fix it..<br />why are you even messing with this? If it was just rebuilt I would assume there is some sort of warranty and it sounds like the guy did a number on ya....<br /><br />Tallman

 

[bolo789]

Re: some one help me time my 470 please

ok guys the so call mechanic is someone close to the family so i did not take any recept or paper work, too bad i found out he is just a morane. any way this is what i did today ,. change the distributor cap, and the roto, adjust the points, to 022, set the timing at 8 degree on the dot, all sparkplug wire is fireing great. i pull them one at a time and they all did what they sopose to do spark in all. but one problrm if i put in nutral and hit the rev seddenly it seems like it want to bogg then it pop from the carb if i rev it slowly some time it will sound great with no backfire then the next time it will back fire and dies. i try to adjust the carb as the book says but it still back fire. what you think guys carb problem????

 

[bolo789]

Re: some one help me time my 470 please

again thanks all yopu guys for taking me through this step by step.

 

[airman]

Re: some one help me time my 470 please

Your backfiring and bogging down sounds very much like a lean condition. If you're sure the carb is OK then check the fuel pump and filter. A carb kit is only about $50 and if you can troubleshoot your ignition the carb should be easy enough for you.

 

[BRIAN03]

Re: some one help me time my 470 please

Check the shift interrupter switch. If the shift cable is not adjusted correctly or sticking it will kill the spark when you accelerate. You need to watch it as someone drives the boat.

 

[clanton]

Re: some one help me time my 470 please

Check the valve clearance. If the valves were removed, seats ground, valves refaced, and the push rods not installed in the same position. The clearance should be checked. There is no screw adjustments for this, the push rods are different lengths.

 

[rodbolt]

Re: some one help me time my 470 please

Hello <br /> If it will run ok if you open the throttle slowly but lean out and pop when opened quickly you need to check the float level and the accelerator pump and carb passages. sounds like a leanout on hard acceleration.<br /> good luck and keep posting

 

[bolo789]

Re: some one help me time my 470 please

ok guys. the backfire has stop this is what i did . i bought a feeler guage for points, i took of the distributor cap off the port engine that has no problem. check the points setting with the feeler match the feel to the problem engine the problem engin points was set too tight i could hardly slide the guage through it. i made the adjust and from i turn the keys the sound i got from the engine i knew i fix the backfireing. rev it in nutral no backfire, took her out for a ride, man she runs great get on plane in no time. so my only problem i has right now is that high back pressure. and i realy need help on this. even after a run when i go back the next day and open the radiator cap a lot of air gush out when i open the other engine no air build up.<br /><br />so my next prob is high back pressure.

 

[bolo789]

Re: some one help me time my 470 please

also when both engine is running the coolant rezevor on the trouble engine is boiling but the good motor is not boiling could that be head gasket?? i did a compression test, i got 120 on 2-4-3 but i got like 115 on nimber one cilinder is that good compression??? i thought it might be over heating the mechanic has said i must change the guage i did and iam getting the same reading, right now i am running it without the thurmostat and it is running more cool . what i will do this week is take it to the reef with no stat see hoe it runs then install a new stat on my way back.<br /><br />thanks everyone for the input we are almost there <br /><br />just help me with the overheating and high back pressure. <br /><br />thanks again <br />bolo god bless

 

[akriverrat]

Re: some one help me time my 470 please

classic head gasket symptom. you don't want to let this go too long... the exhaust can cut a groove in the head (bad) or block (worse) that has to be machined out to get a new gasket to seal.

 

[bolo789]

Re: some one help me time my 470 please

thanks for the quick come back, so all i have to do is take the head off, get it milled also let them look at the valve and seals, do i have to mill the block surface too?? <br /><br />thanks again